* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2009-05-14 15:01 Joshua Saddler (nightmorph)
0 siblings, 0 replies; 14+ messages in thread
From: Joshua Saddler (nightmorph) @ 2009-05-14 15:01 UTC (permalink / raw
To: gentoo-doc-cvs
nightmorph 09/05/14 15:01:19
Modified: power-management-guide.xml
Log:
Updated kernel info for bug 269808, thanks to fauli@g.o for the patch
Revision Changes Path
1.39 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.39&view=markup
plain: http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.39&content-type=text/plain
diff : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.38&r2=1.39
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.38
retrieving revision 1.39
diff -u -r1.38 -r1.39
--- power-management-guide.xml 28 Sep 2008 20:29:25 -0000 1.38
+++ power-management-guide.xml 14 May 2009 15:01:19 -0000 1.39
@@ -1,6 +1,6 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.38 2008/09/28 20:29:25 nightmorph Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.39 2009/05/14 15:01:19 nightmorph Exp $ -->
<guide link="/doc/en/power-management-guide.xml">
<title>Power Management Guide</title>
@@ -23,8 +23,8 @@
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
<license/>
-<version>1.41</version>
-<date>2008-09-28</date>
+<version>1.42</version>
+<date>2009-05-14</date>
<chapter>
<title>Introduction</title>
@@ -160,14 +160,12 @@
</p>
<pre caption="Minimum kernel setup for Power Management (Kernel 2.6)">
-Power Management Options --->
- [*] Power Management Support
+Power management and ACPI options --->
+[*] Power Management Support
[ ] Software Suspend
ACPI( Advanced Configuration and Power Interface ) Support --->
- [*] ACPI Support
- [ ] Sleep States
- [ ] /proc/acpi/sleep (deprecated)
+ [ ] Deprecated /proc/acpi/ files
[*] AC Adapter
[*] Battery
<M> Button
@@ -1326,10 +1324,10 @@
<p>
There are two different implementations for S4. The original one is swsusp,
-then there is the newer tuxonice (former suspend2) with a nicer interface
+then there is the newer tuxonice (formerly suspend2) with a nicer interface
(including fbsplash support). A <uri
-link="http://tuxonice.net/features.html#compare"> feature comparison</uri> is
-available at the <uri link="http://www.tuxonice.net">tuxonice Homepage</uri>.
+link="http://tuxonice.net/features.html#compare">feature comparison</uri> is
+available at the <uri link="http://www.tuxonice.net">tuxonice homepage</uri>.
There used to be Suspend-to-Disk (pmdisk), a fork of swsusp, but it has been
merged back.
</p>
@@ -1337,7 +1335,7 @@
<p>
TuxOnIce is not included in the mainline kernel yet, therefore you either have
to patch your kernel sources with the patches provided by <uri
-link="http://tuxonice.net">tuxonice.net</uri> or use
+link="http://www.tuxonice.net">tuxonice.net</uri> or use
<c>sys-kernel/tuxonice-sources</c>.
</p>
@@ -1346,22 +1344,21 @@
</p>
<pre caption="Kernel configuration for the various suspend types">
-Power Management Options --->
+Power Management and ACPI options --->
<comment>(hibernate with swsusp)</comment>
- [*] Software Suspend
+ [*] Hibernation (aka 'suspend to disk')
<comment>(replace /dev/SWAP with your swap partition)</comment>
(/dev/SWAP) Default resume partition
<comment>(hibernate with TuxOnIce)</comment>
Enhanced Hibernation (TuxOnIce)
- --- Image Storage (you need at least one writer)
- [*] File Writer
- [*] Swap Writer
+ --- Image Storage (you need at least one allocator)
+ [*] File Allocator
+ [*] Swap Allocator
--- General Options
- [*] LZF image compression
- <comment>(replace /dev/SWAP with your swap partition)</comment>
- (swap:/dev/SWAP) Default resume device name
+ [*] Compression support
[ ] Allow Keep Image Mode
+ [*] Replace swsusp by default
</pre>
<p>
@@ -1420,13 +1417,13 @@
</pre>
<p>
-Now edit <path>/etc/hibernate/suspend2.conf</path>, enable the <c>TuxOnIce</c>
+Now edit <path>/etc/hibernate/tuxonice.conf</path>, enable the <c>TuxOnIce</c>
options you need. Do not enable the <c>fbsplash</c> options in
<c>common.conf</c> just yet.
</p>
<pre caption="Hibernating with TuxOnIce">
-# <i>nano -w /etc/hibernate/suspend2.conf</i>
+# <i>nano -w /etc/hibernate/tuxonice.conf</i>
<comment>(Make sure you have a backup of your data)</comment>
# <i>hibernate</i>
</pre>
@@ -1450,7 +1447,7 @@
</p>
<pre caption="Using the livecd-2005.1 theme during hibernation">
-# <i>ln -sfn /etc/splash/livecd-2005.1 /etc/splash/suspend2</i>
+# <i>ln -sfn /etc/splash/livecd-2005.1 /etc/splash/tuxonice</i>
</pre>
<p>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2009-08-05 14:51 Joshua Saddler (nightmorph)
0 siblings, 0 replies; 14+ messages in thread
From: Joshua Saddler (nightmorph) @ 2009-08-05 14:51 UTC (permalink / raw
To: gentoo-doc-cvs
nightmorph 09/08/05 14:51:17
Modified: power-management-guide.xml
Log:
updated kernel config layout, bug 278557
Revision Changes Path
1.40 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.40&view=markup
plain: http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.40&content-type=text/plain
diff : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.39&r2=1.40
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.39
retrieving revision 1.40
diff -u -r1.39 -r1.40
--- power-management-guide.xml 14 May 2009 15:01:19 -0000 1.39
+++ power-management-guide.xml 5 Aug 2009 14:51:17 -0000 1.40
@@ -1,6 +1,6 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.39 2009/05/14 15:01:19 nightmorph Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.40 2009/08/05 14:51:17 nightmorph Exp $ -->
<guide link="/doc/en/power-management-guide.xml">
<title>Power Management Guide</title>
@@ -23,8 +23,8 @@
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
<license/>
-<version>1.42</version>
-<date>2009-05-14</date>
+<version>1.43</version>
+<date>2009-08-05</date>
<chapter>
<title>Introduction</title>
@@ -161,7 +161,7 @@
<pre caption="Minimum kernel setup for Power Management (Kernel 2.6)">
Power management and ACPI options --->
-[*] Power Management Support
+[*] Power Management support
[ ] Software Suspend
ACPI( Advanced Configuration and Power Interface ) Support --->
@@ -1250,9 +1250,7 @@
<pre caption="Kernel configuration for the various suspend types">
Power Management Options --->
[*] Power Management support
- ACPI (Advanced Configuration and Power Interface) Support --->
- [*] ACPI Support
- [*] Sleep States
+ [*] Suspend to RAM and standby
</pre>
<p>
@@ -1344,7 +1342,7 @@
</p>
<pre caption="Kernel configuration for the various suspend types">
-Power Management and ACPI options --->
+Power Management support --->
<comment>(hibernate with swsusp)</comment>
[*] Hibernation (aka 'suspend to disk')
<comment>(replace /dev/SWAP with your swap partition)</comment>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2009-08-12 2:24 Joshua Saddler (nightmorph)
0 siblings, 0 replies; 14+ messages in thread
From: Joshua Saddler (nightmorph) @ 2009-08-12 2:24 UTC (permalink / raw
To: gentoo-doc-cvs
nightmorph 09/08/12 02:24:57
Modified: power-management-guide.xml
Log:
Rewrite some parts around the cpufreq comparison table. I missed these in the last commit when I switched stuff over to cpufrequtils as the default. Also added more examples on how to use cpufrequtils to show its flexibility. Other improvements elsewhere.
Revision Changes Path
1.41 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.41&view=markup
plain: http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.41&content-type=text/plain
diff : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.40&r2=1.41
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.40
retrieving revision 1.41
diff -u -r1.40 -r1.41
--- power-management-guide.xml 5 Aug 2009 14:51:17 -0000 1.40
+++ power-management-guide.xml 12 Aug 2009 02:24:57 -0000 1.41
@@ -1,6 +1,6 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.40 2009/08/05 14:51:17 nightmorph Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.41 2009/08/12 02:24:57 nightmorph Exp $ -->
<guide link="/doc/en/power-management-guide.xml">
<title>Power Management Guide</title>
@@ -23,8 +23,8 @@
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
<license/>
-<version>1.43</version>
-<date>2009-08-05</date>
+<version>1.44</version>
+<date>2009-08-11</date>
<chapter>
<title>Introduction</title>
@@ -460,7 +460,7 @@
</body>
</section>
<section>
-<title>Setting The Frequency Manually</title>
+<title>Setting The Frequency</title>
<body>
<p>
@@ -479,7 +479,7 @@
<p>
It's time to test whether CPU frequency changing works. Let's install another
-tool which is very handy for debugging purposes: <c>sys-power/cpufrequtils</c>
+tool: <c>sys-power/cpufrequtils</c>.
</p>
<pre caption="Checking CPU frequency">
@@ -514,20 +514,37 @@
section</uri> in the end of this guide.
</p>
+<p>
+<c>cpufrequtils</c> can operate in an automatic mode (when you use the
+<b>ondemand</b> governor), you can also switch to the <b>userspace</b> governor
+if you want to manually set a specific speed. You can also statically set your
+CPU to its highest or lowest frequency by using the <b>performance</b>
+and <b>powersave</b> governors, respectively.
+</p>
+
+<pre caption="Changing CPU speeds">
+<comment>(Set the highest available frequency)</comment>
+# <i>cpufreq-set -g performance</i>
+<comment>(Set the lowest available frequency)</comment>
+# <i>cpufreq-set -g powersave</i>
+<comment>(Set a specific frequency)</comment>
+# <i>cpufreq-set -g userspace</i>
+# <i>cpufreq-set -f 2.00ghz</i>
+</pre>
+
</body>
</section>
<section>
-<title>Automated frequency adaption</title>
+<title>Other CPU Speed Utilities</title>
<body>
<p>
-The above is quite nice, but not doable in daily life. Better let your system
-set the appropriate frequency automatically. There are many different
-approaches to do this. The following table gives a quick overview to help you
-decide on one of them. It's roughly separated in three categories <b>kernel</b>
-for approaches that only need kernel support, <b>daemon</b> for programs that
-run in the background and <b>graphical</b> for programs that provide a GUI for
-easy configuration and changes.
+While <c>cpufrequtils</c> may be the best all-around program, there are some
+other choices available in Portage. The following table gives a quick overview
+of available CPU speed utilities. It's roughly separated in three categories
+<b>kernel</b> for approaches that only need kernel support, <b>daemon</b> for
+programs that run in the background and <b>graphical</b> for programs that
+provide a GUI for easy configuration and changes.
</p>
<table>
@@ -741,7 +758,7 @@
<pre caption="Starting cpufreqd">
# <i>rc-update add cpufreqd default battery</i>
-# <i>rc</i>
+# <i>/etc/init.d/cpufreqd start</i>
</pre>
<p>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2010-01-22 15:48 Joshua Saddler (nightmorph)
0 siblings, 0 replies; 14+ messages in thread
From: Joshua Saddler (nightmorph) @ 2010-01-22 15:48 UTC (permalink / raw
To: gentoo-doc-cvs
nightmorph 10/01/22 15:48:01
Modified: power-management-guide.xml
Log:
use new ACPI event messages, bug 301840
Revision Changes Path
1.42 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.42&view=markup
plain: http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.42&content-type=text/plain
diff : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.41&r2=1.42
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.41
retrieving revision 1.42
diff -u -r1.41 -r1.42
--- power-management-guide.xml 12 Aug 2009 02:24:57 -0000 1.41
+++ power-management-guide.xml 22 Jan 2010 15:48:00 -0000 1.42
@@ -1,7 +1,8 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.41 2009/08/12 02:24:57 nightmorph Exp $ -->
-<guide link="/doc/en/power-management-guide.xml">
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.42 2010/01/22 15:48:00 nightmorph Exp $ -->
+
+<guide>
<title>Power Management Guide</title>
<author title="Author">
@@ -11,7 +12,7 @@
<mail link="chriswhite@gentoo.org">Chris White</mail>
</author>
<author title="Editor">
- <mail link="nightmorph@gentoo.org">Joshua Saddler</mail>
+ <mail link="nightmorph"/>
</author>
<abstract>
@@ -23,8 +24,8 @@
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
<license/>
-<version>1.44</version>
-<date>2009-08-11</date>
+<version>1.45</version>
+<date>2010-01-22</date>
<chapter>
<title>Introduction</title>
@@ -333,7 +334,7 @@
</p>
<pre caption="Determining ACPI events for changing the power source">
-# <i>tail -f /var/log/messages | grep "received event"</i>
+# <i>tail -f /var/log/messages | grep "ACPI event"</i>
</pre>
<p>
@@ -342,8 +343,8 @@
</p>
<pre caption="Sample output for power source changes">
-[Tue Sep 20 17:39:06 2005] received event "ac_adapter AC 00000080 00000000"
-[Tue Sep 20 17:39:06 2005] received event "battery BAT0 00000080 00000001"
+[Tue Sep 20 17:39:06 2005] ACPI event "ac_adapter AC 00000080 00000000"
+[Tue Sep 20 17:39:06 2005] ACPI event "battery BAT0 00000080 00000001"
</pre>
<p>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2010-04-05 1:25 Joshua Saddler (nightmorph)
0 siblings, 0 replies; 14+ messages in thread
From: Joshua Saddler (nightmorph) @ 2010-04-05 1:25 UTC (permalink / raw
To: gentoo-doc-cvs
nightmorph 10/04/05 01:25:54
Modified: power-management-guide.xml
Log:
switch powermgmt-base to pm-utils, bug 309899
Revision Changes Path
1.43 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.43&view=markup
plain: http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.43&content-type=text/plain
diff : http://sources.gentoo.org/viewcvs.py/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.42&r2=1.43
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.42
retrieving revision 1.43
diff -u -r1.42 -r1.43
--- power-management-guide.xml 22 Jan 2010 15:48:00 -0000 1.42
+++ power-management-guide.xml 5 Apr 2010 01:25:53 -0000 1.43
@@ -1,6 +1,6 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.42 2010/01/22 15:48:00 nightmorph Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.43 2010/04/05 01:25:53 nightmorph Exp $ -->
<guide>
<title>Power Management Guide</title>
@@ -24,8 +24,8 @@
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
<license/>
-<version>1.45</version>
-<date>2010-01-22</date>
+<version>1.46</version>
+<date>2010-04-04</date>
<chapter>
<title>Introduction</title>
@@ -273,12 +273,12 @@
<p>
First you need a script which changes the runlevel to <c>default</c>
respectively <c>battery</c> depending on the power source. The script uses the
-<c>on_ac_power</c> command from <c>sys-power/powermgmt-base</c> - make sure the
+<c>on_ac_power</c> command from <c>sys-power/pm-utils</c> - make sure the
package is installed on your system.
</p>
-<pre caption="Installing powermgt-base">
-# <i>emerge powermgmt-base</i>
+<pre caption="Installing pm-utils">
+# <i>emerge pm-utils</i>
</pre>
<p>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2010-07-18 6:36 Jan Kundrat (jkt)
0 siblings, 0 replies; 14+ messages in thread
From: Jan Kundrat (jkt) @ 2010-07-18 6:36 UTC (permalink / raw
To: gentoo-doc-cvs
jkt 10/07/18 06:36:58
Modified: power-management-guide.xml
Log:
#301840, s/received event/ACPI event/
Revision Changes Path
1.44 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.44&view=markup
plain: http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.44&content-type=text/plain
diff : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.43&r2=1.44
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.43
retrieving revision 1.44
diff -u -r1.43 -r1.44
--- power-management-guide.xml 5 Apr 2010 01:25:53 -0000 1.43
+++ power-management-guide.xml 18 Jul 2010 06:36:58 -0000 1.44
@@ -1,6 +1,6 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.43 2010/04/05 01:25:53 nightmorph Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.44 2010/07/18 06:36:58 jkt Exp $ -->
<guide>
<title>Power Management Guide</title>
@@ -24,8 +24,8 @@
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
<license/>
-<version>1.46</version>
-<date>2010-04-04</date>
+<version>1.47</version>
+<date>2010-07-18</date>
<chapter>
<title>Introduction</title>
@@ -348,7 +348,7 @@
</pre>
<p>
-The interesting part is the quoted string after <c>received event</c>. It will
+The interesting part is the quoted string after <c>ACPI event</c>. It will
be matched by the event line in the files you are going to create below. Don't
worry if your system generates multiple events or always the same. As long as
any event is generated, runlevel changing will work.
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2011-03-02 9:18 Joshua Saddler (nightmorph)
0 siblings, 0 replies; 14+ messages in thread
From: Joshua Saddler (nightmorph) @ 2011-03-02 9:18 UTC (permalink / raw
To: gentoo-doc-cvs
nightmorph 11/03/02 09:18:04
Modified: power-management-guide.xml
Log:
remove outdated keywording instructions now that tuxonice-userui is stable
Revision Changes Path
1.45 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.45&view=markup
plain: http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.45&content-type=text/plain
diff : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.44&r2=1.45
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.44
retrieving revision 1.45
diff -u -r1.44 -r1.45
--- power-management-guide.xml 18 Jul 2010 06:36:58 -0000 1.44
+++ power-management-guide.xml 2 Mar 2011 09:18:04 -0000 1.45
@@ -1,6 +1,6 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.44 2010/07/18 06:36:58 jkt Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.45 2011/03/02 09:18:04 nightmorph Exp $ -->
<guide>
<title>Power Management Guide</title>
@@ -24,8 +24,8 @@
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
<license/>
-<version>1.47</version>
-<date>2010-07-18</date>
+<version>2</version>
+<date>2011-03-02</date>
<chapter>
<title>Introduction</title>
@@ -1452,8 +1452,6 @@
<pre caption="Installing tuxonice-userui">
# <i>echo "sys-apps/tuxonice-userui fbsplash" >> /etc/portage/package.use</i>
-<comment>(It may be marked ~arch, so first it must be keyworded)</comment>
-# <i>echo "sys-apps/tuxonice-userui" >> /etc/portage/package.keywords</i>
# <i>emerge tuxonice-userui</i>
</pre>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2011-03-28 10:26 Joshua Saddler (nightmorph)
0 siblings, 0 replies; 14+ messages in thread
From: Joshua Saddler (nightmorph) @ 2011-03-28 10:26 UTC (permalink / raw
To: gentoo-doc-cvs
nightmorph 11/03/28 10:26:10
Modified: power-management-guide.xml
Log:
typo fix, no content change. bug 360277.
Revision Changes Path
1.46 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.46&view=markup
plain: http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.46&content-type=text/plain
diff : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.45&r2=1.46
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.45
retrieving revision 1.46
diff -u -r1.45 -r1.46
--- power-management-guide.xml 2 Mar 2011 09:18:04 -0000 1.45
+++ power-management-guide.xml 28 Mar 2011 10:26:10 -0000 1.46
@@ -1,6 +1,6 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.45 2011/03/02 09:18:04 nightmorph Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.46 2011/03/28 10:26:10 nightmorph Exp $ -->
<guide>
<title>Power Management Guide</title>
@@ -65,7 +65,7 @@
sections will work. This includes BIOS settings, kernel configuration and some
simplifications in user land. The following three chapters focus on devices
that typically consume most energy - processor, display and hard drive. Each
-can be configured seperately. <uri link="#doc_chap3">CPU Power Management</uri>
+can be configured separately. <uri link="#doc_chap3">CPU Power Management</uri>
shows how to adjust the processor's frequency to save a maximum of energy
without losing too much performance. A few different tricks prevent your hard
drive from working unnecessarily often in <uri link="#doc_chap5">Disk Power
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2011-08-17 7:10 Sven Vermeulen (swift)
0 siblings, 0 replies; 14+ messages in thread
From: Sven Vermeulen (swift) @ 2011-08-17 7:10 UTC (permalink / raw
To: gentoo-doc-cvs
swift 11/08/17 07:10:12
Modified: power-management-guide.xml
Log:
Bug #367145 - Update powermanagement guide to reflect OpenRC changes
Revision Changes Path
1.47 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.47&view=markup
plain: http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.47&content-type=text/plain
diff : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.46&r2=1.47
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.46
retrieving revision 1.47
diff -u -r1.46 -r1.47
--- power-management-guide.xml 28 Mar 2011 10:26:10 -0000 1.46
+++ power-management-guide.xml 17 Aug 2011 07:10:12 -0000 1.47
@@ -1,6 +1,6 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.46 2011/03/28 10:26:10 nightmorph Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.47 2011/08/17 07:10:12 swift Exp $ -->
<guide>
<title>Power Management Guide</title>
@@ -24,8 +24,8 @@
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
<license/>
-<version>2</version>
-<date>2011-03-02</date>
+<version>3</version>
+<date>2011-08-17</date>
<chapter>
<title>Introduction</title>
@@ -391,18 +391,20 @@
<c>softlevel=battery</c>, but it's likely to forget choosing it. A better way
is faking an ACPI event in the end of the boot process and letting
<path>pmg_switch_runlevel.sh</path> script decide whether a runlevel change is
-necessary. Open <path>/etc/conf.d/local.start</path> in your favourite editor
-and add these lines:
+necessary. Create a <path>/etc/local.d/battery.start</path> file with the
+following contents:
</p>
-<pre caption="Runlevel adjustment at boot time by editing local.start">
+<pre caption="Runlevel adjustment at boot time through local.d/battery.start">
+#!/bin/sh
<comment># Fake acpi event to switch runlevel if running on batteries</comment>
/etc/acpi/actions/pmg_switch_runlevel.sh "battery/battery"
</pre>
<p>
-Prepared like this you can activate Power Management policies for individual
-devices.
+Don't forget to mark the file as executable (<c>chmod +x
+/etc/local.d/battery.start</c>). Prepared like this you can activate Power
+Management policies for individual devices.
</p>
</body>
@@ -886,11 +888,17 @@
loaded with the experimental parameter.
</p>
-<pre caption="automatically loading the thinkpad_acpi module">
+<pre caption="Automatically loading the thinkpad_acpi module">
<comment>(Please read the warnings above before doing this!)</comment>
+
# <i>echo "options thinkpad_acpi experimental=1" >> /etc/modprobe.d/thinkpad_acpi</i>
# <i>update-modules</i>
-# <i>echo thinkpad_acpi >> /etc/modules.autoload.d/kernel-2.6</i>
+# <i>nano /etc/conf.d/modules</i>
+<comment># Autoload the thinkpad_acpi module</comment>
+modules_2_6="thinkpad_acpi"
+<comment># Parameters for the thinkpad_acpi module</comment>
+modules_thinkpad_acpi_args_2_6="experimental=1"
+
# <i>modprobe thinkpad_acpi</i>
</pre>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2011-08-17 7:19 Sven Vermeulen (swift)
0 siblings, 0 replies; 14+ messages in thread
From: Sven Vermeulen (swift) @ 2011-08-17 7:19 UTC (permalink / raw
To: gentoo-doc-cvs
swift 11/08/17 07:19:29
Modified: power-management-guide.xml
Log:
Bug #367145 - Update pmg_switch_runlevel.sh script and add a note in the beginning of the document that this script has been updated
Revision Changes Path
1.48 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.48&view=markup
plain: http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.48&content-type=text/plain
diff : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.47&r2=1.48
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.47
retrieving revision 1.48
diff -u -r1.47 -r1.48
--- power-management-guide.xml 17 Aug 2011 07:10:12 -0000 1.47
+++ power-management-guide.xml 17 Aug 2011 07:19:29 -0000 1.48
@@ -1,6 +1,6 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.47 2011/08/17 07:10:12 swift Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.48 2011/08/17 07:19:29 swift Exp $ -->
<guide>
<title>Power Management Guide</title>
@@ -24,7 +24,7 @@
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
<license/>
-<version>3</version>
+<version>4</version>
<date>2011-08-17</date>
<chapter>
@@ -32,6 +32,18 @@
<section>
<body>
+<!--
+ Remove this note after 6 months - ETA 01/02/2012
+ By then, we can assume that OpenRC migrations are not that frequent
+ anymore and this note can be dropped.
+ ~ Sven Vermeulen
+-->
+<impo>
+Since the introduction of OpenRC, the <c>pmg_switch_runlevel.sh</c> script
+needs to be updated. If you have issues after the OpenRC upgrade, please update
+this script according to this guide.
+</impo>
+
<p>
Capacity and lifetime of laptop batteries have improved much in the last years.
Nevertheless modern processors consume much more energy than older ones and
@@ -291,34 +303,42 @@
<pre caption="/etc/acpi/actions/pmg_switch_runlevel.sh">
#!/bin/bash
-<comment># BEGIN configuration</comment>
+# BEGIN configuration
RUNLEVEL_AC="default"
RUNLEVEL_BATTERY="battery"
-<comment># END configuration</comment>
+
+if [ -x /usr/bin/logger ]; then
+ LOGGER="/usr/bin/logger -s -p daemon.info -t /etc/acpi/actions/pmg_switch_runlevel.sh"
+else
+ LOGGER="/bin/echo"
+fi
+
+ON_AC_POWER=/usr/bin/on_ac_power
+# END configuration
if [ ! -d "/etc/runlevels/${RUNLEVEL_AC}" ]
then
- logger "${0}: Runlevel ${RUNLEVEL_AC} does not exist. Aborting."
+ ${LOGGER} "${0}: Runlevel ${RUNLEVEL_AC} does not exist. Aborting."
exit 1
fi
if [ ! -d "/etc/runlevels/${RUNLEVEL_BATTERY}" ]
then
- logger "${0}: Runlevel ${RUNLEVEL_BATTERY} does not exist. Aborting."
+ ${LOGGER} "${0}: Runlevel ${RUNLEVEL_BATTERY} does not exist. Aborting."
exit 1
fi
-if on_ac_power
+if ${on_ac_power}
then
- if [[ "$(</var/lib/init.d/softlevel)" != "${RUNLEVEL_AC}" ]]
+ if [[ "$(rc-status --runlevel)" != "${RUNLEVEL_AC}" ]]
then
- logger "Switching to ${RUNLEVEL_AC} runlevel"
- /sbin/rc ${RUNLEVEL_AC}
+ ${LOGGER} "Switching to ${RUNLEVEL_AC} runlevel"
+ /sbin/rc ${RUNLEVEL_AC}
fi
-elif [[ "$(</var/lib/init.d/softlevel)" != "${RUNLEVEL_BATTERY}" ]]
+elif [[ "$(rc-status --runlevel)" != "${RUNLEVEL_BATTERY}" ]]
then
- logger "Switching to ${RUNLEVEL_BATTERY} runlevel"
+ ${LOGGER} "Switching to ${RUNLEVEL_BATTERY} runlevel"
/sbin/rc ${RUNLEVEL_BATTERY}
fi
</pre>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2011-09-23 18:41 Sven Vermeulen (swift)
0 siblings, 0 replies; 14+ messages in thread
From: Sven Vermeulen (swift) @ 2011-09-23 18:41 UTC (permalink / raw
To: gentoo-doc-cvs
swift 11/09/23 18:41:52
Modified: power-management-guide.xml
Log:
Fix bugs #379523 and #381059, rewrite power management guide reflecting recent developments in userspace support
Revision Changes Path
1.49 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.49&view=markup
plain: http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.49&content-type=text/plain
diff : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.48&r2=1.49
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.48
retrieving revision 1.49
diff -u -r1.48 -r1.49
--- power-management-guide.xml 17 Aug 2011 07:19:29 -0000 1.48
+++ power-management-guide.xml 23 Sep 2011 18:41:52 -0000 1.49
@@ -1,109 +1,74 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.48 2011/08/17 07:19:29 swift Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.49 2011/09/23 18:41:52 swift Exp $ -->
<guide>
<title>Power Management Guide</title>
<author title="Author">
- <mail link="earthwings@gentoo.org">Dennis Nienhüser</mail>
-</author>
-<author title="Editor">
- <mail link="chriswhite@gentoo.org">Chris White</mail>
-</author>
-<author title="Editor">
- <mail link="nightmorph"/>
+ <mail link="swift"/>
</author>
<abstract>
-Power Management is the key to extend battery run time on mobile systems like
-laptops. This guide assists you setting it up on your laptop.
+In recent years, power management has become one of the differentiating
+features in the quest for finding the perfect laptop. Yet, the operating system
+must support the various power saving functionalities too. In this guide, we
+cover how to setup your Gentoo installation so it manages power-hungry resources
+in a flexible yet automated manner.
</abstract>
<!-- The content of this document is licensed under the CC-BY-SA license -->
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
<license/>
-<version>4</version>
-<date>2011-08-17</date>
+<version>5</version>
+<date>2011-09-22</date>
<chapter>
<title>Introduction</title>
<section>
+<title>About this document...</title>
<body>
-<!--
- Remove this note after 6 months - ETA 01/02/2012
- By then, we can assume that OpenRC migrations are not that frequent
- anymore and this note can be dropped.
- ~ Sven Vermeulen
--->
-<impo>
-Since the introduction of OpenRC, the <c>pmg_switch_runlevel.sh</c> script
-needs to be updated. If you have issues after the OpenRC upgrade, please update
-this script according to this guide.
-</impo>
+<p>
+This document describes the setup of power management features on your laptop.
+Although some of the information in this guide can be applied to power
+management for servers, it is not the intention of this document to go that
+route. Please be careful when applying this on a non-laptop system.
+</p>
<p>
-Capacity and lifetime of laptop batteries have improved much in the last years.
-Nevertheless modern processors consume much more energy than older ones and
-each laptop generation introduces more devices hungry for energy. That's why
-Power Management is more important than ever. Increasing battery run time
-doesn't necessarily mean buying another battery. Much can be achieved applying
-intelligent Power Management policies.
+Within this document, we will focus primarily on the laptop mode tools since it
+offers a complete set of functionalities. However, we will also refer to other
+tools that might offer a more detailed approach on individual settings. In such
+cases, you will need to disable the feature from the laptop mode tools so that
+both tools do not fight over the same resource control.
</p>
</body>
</section>
<section>
-<title>A Quick Overview</title>
+<title>About laptop_mode</title>
<body>
<p>
-Please notice that this guide describes Power Management for <e>laptops</e>.
-While some sections might also suite for <e>servers</e>, others do not and may
-even cause harm. Please do not apply anything from this guide to a server
-unless you really know what you are doing.
-</p>
-
-<p>
-As this guide has become rather long, here's a short overview helping you to
-find your way through it.
-</p>
-
-<p>
-The <uri link="#doc_chap2">Prerequisites</uri> chapter talks about some
-requirements that should be met before any of the following device individual
-sections will work. This includes BIOS settings, kernel configuration and some
-simplifications in user land. The following three chapters focus on devices
-that typically consume most energy - processor, display and hard drive. Each
-can be configured separately. <uri link="#doc_chap3">CPU Power Management</uri>
-shows how to adjust the processor's frequency to save a maximum of energy
-without losing too much performance. A few different tricks prevent your hard
-drive from working unnecessarily often in <uri link="#doc_chap5">Disk Power
-Management</uri> (decreasing noise level as a nice side effect). Some notes on
-graphics cards, Wireless LAN and USB finish the device section in <uri
-link="#doc_chap6">Power Management For Other Devices</uri> while another
-chapter is dedicated to the (rather experimental) <uri link="#doc_chap7">sleep
-states</uri>. Last not least <uri link="#doc_chap8">Troubleshooting</uri> lists
-common pitfalls.
+The <c>laptop_mode</c> setting is an in-kernel configuration setting that
+optimizes I/O, allowing disks to spin down properly (and not be woken up
+immediately afterwards for queued operations).
</p>
</body>
</section>
<section>
-<title>Power Budget For Each Component</title>
+<title>About laptop-mode-tools</title>
<body>
-<figure link="/images/energy-budget.png" short="Which component consumes how
-much energy?" caption="Power budget for each component"/>
-
<p>
-Nearly every component can operate in different states - off, sleep, idle,
-active to name a few - consuming a different amount of energy. Major parts are
-consumed by the LCD display, CPU, chipset and hard drives. Often one is able to
-activate OS-independent Power Management in the BIOS, but an intelligent setup
-in the operating system adapting to different situations can achieve much more.
+The <e>Laptop Mode Tools</e> is a software package
+(<c>app-laptop/laptop-mode-tools</c>) which allows the user to optimize power
+saving functions. It allows managing the <c>laptop_mode</c> setting in the Linux
+kernel, but has additional features allowing you to tweak other power-related
+settings on the system.
</p>
</body>
@@ -111,881 +76,566 @@
</chapter>
<chapter>
-<title>Prerequisites</title>
+<title>Linux Kernel Configuration</title>
<section>
+<title>Minimum kernel setup</title>
<body>
<p>
-Before discussing the details of making individual devices Power Management
-aware, make sure certain requirements are met. After controlling BIOS settings,
-some kernel options want to be enabled - these are in short ACPI, sleep states
-and CPU frequency scaling. As power saving most of the time comes along with
-performance loss or increased latency, it should only be enabled when running
-on batteries. That's where a new runlevel <e>battery</e> comes in handy.
+There are different kernel sources in Portage. We recommend using
+<c>gentoo-sources</c>, but if you want advanced hibernation support you might
+need <c>tuxonice-sources</c>. To enable proper power management features in the
+Linux kernel, enable at least the following settings:
</p>
-</body>
-</section>
-<section>
-<title>The BIOS Part</title>
-<body>
+<pre caption="Minimum kernel setup for Power Management (Kernel 2.6)">
+<![CDATA[
+General setup --->
+ [*] Configure standard kernel features (expert users) --->
+
+Power management and ACPI options --->
+ [*] ACPI (Advanced Configuration and Power Interface) Support --->
+ <*> AC Adapter
+ <*> Battery
+ -*- Button
+ -*- Video
+ <*> Fan
+ <*> Processor
+ <*> Thermal Zone
+ [*] Power Management Timer Support
+
+ [*] CPU Frequency scaling --->
+ [*] CPU Frequency scaling
+ <*> 'performance' governor
+ <*> 'powersave' governor
+ <*> 'userspace' governor
+ <*> 'ondemand' governor
+ <*> 'conservative' governor
+ <*> ACPI Processor P-States driver
+]]>
+</pre>
<p>
-First have a look into your BIOS Power Management settings. The best way is to
-combine BIOS and operating system policies, but for the moment it's better to
-disable most of the BIOS part. This makes sure it doesn't interfere with your
-policies. Don't forget to re-check BIOS settings after you configured
-everything else.
+Don't forget to enable the CPU frequency scaling driver for your CPU, located
+right after the <e>ACPI Processor P-States driver</e> mentioned above.
</p>
-</body>
-</section>
-<section>
-<title>Setting USE Flags</title>
-<body>
-
<p>
-Please check that the <c>acpi</c> USE flag is set in
-<path>/etc/make.conf</path>. Other USE flags that might be interesting for your
-system are <c>apm</c>, <c>lm_sensors</c>, <c>nforce2</c>, <c>nvidia</c>,
-<c>pmu</c>. See <path>/usr/portage/profiles/use*.desc</path> for details. If
-you forgot to set one of these flags, you can recompile affected packages using
-the <c>--newuse</c> flag in <c>emerge</c>, see <c>man emerge</c>.
+Build and install the new kernel (if necessary) and reboot.
</p>
</body>
</section>
-<section>
-<title>Configuring The Kernel</title>
+<!--
+<section id="kernelconfig">
+<title>Additional kernel configuration entries</title>
<body>
<p>
-ACPI (Advanced Configuration and Power Interface) support in the kernel is
-still work in progress. Using a recent kernel will make sure you'll get the
-most out of it.
+Further down this guide, additional kernel settings might be suggested. To
+lessen the effort to maintain the guide, and to make sure settings are correctly
+identified, we will use the kernel configuration short-hand notations. These
+notations are simple strings, like <c>CONFIG_USB_SUSPEND</c>. But how to read
+this?
</p>
<p>
-There are different kernel sources in Portage. I'd recommend using
-<c>gentoo-sources</c> or <c>tuxonice-sources</c>. The latter contains patches
-for TuxOnIce, see the chapter about <uri link="#doc_chap7">sleep states</uri>
-for more details. When configuring the kernel, activate at least these options:
+Well, then you configure your kernel (through <c>make menuconfig</c>), you can
+search through the configuration settings for a particular entry. Press <c>/</c>
+while configuring the Linux kernel and type the setting
+(<c>CONFIG_USB_SUSPEND</c>). The software will tell you what the setting is,
+what it is for, when you can select it (i.e. on which settings it depends before
+you can see it) but most importantly, where you can find it.
</p>
-<pre caption="Minimum kernel setup for Power Management (Kernel 2.6)">
-Power management and ACPI options --->
-[*] Power Management support
- [ ] Software Suspend
-
- ACPI( Advanced Configuration and Power Interface ) Support --->
- [ ] Deprecated /proc/acpi/ files
- [*] AC Adapter
- [*] Battery
- <M> Button
- <M> Video
- [ ] Generic Hotkey
- <M> Fan
- <M> Processor
- <M> Thermal Zone
- < > ASUS/Medion Laptop Extras
- < > IBM ThinkPad Laptop Extras
- < > Toshiba Laptop Extras
- (0) Disable ACPI for systems before Jan 1st this year
- [ ] Debug Statements
- [*] Power Management Timer Support
- < > ACPI0004,PNP0A05 and PNP0A06 Container Driver (EXPERIMENTAL)
-
- CPU Frequency Scaling --->
- [*] CPU Frequency scaling
- [ ] Enable CPUfreq debugging
- < > CPU frequency translation statistics
- [ ] CPU frequency translation statistics details
- Default CPUFreq governor (userspace)
- <*> 'performance' governor
- <*> 'powersave' governor
- <*> 'ondemand' cpufreq policy governor
- <*> 'conservative' cpufreq governor
- <*> CPU frequency table helpers
- <M> ACPI Processor P-States driver
- <*> <i>CPUFreq driver for your processor</i>
+<pre caption="Result of a search operation during menuconfig">
+<![CDATA[Symbol: USB_SUSPEND [=n]
+Type : boolean
+Prompt: USB runtime power management (autosuspend) and wakeup
+ Defined at drivers/usb/core/Kconfig:93
+ Depends on: USB_SUPPORT [=y] && USB [=y] && PM_RUNTIME [=n]
+ Location:
+ -> Device Drivers
+ -> USB support (USB_SUPPORT [=y])
+ -> Support for Host-side USB (USB [=y]) ]]>
</pre>
-<p>
-Decide yourself whether you want to enable Software Suspend, and Sleep States
-(see below). If you own an ASUS, Medion, IBM Thinkpad or Toshiba laptop, enable
-the appropriate section.
-</p>
+</body>
+</section>
+-->
+</chapter>
+
+<chapter>
+<title>Using Laptop Mode Tools</title>
+<section>
+<title>Installation</title>
+<body>
<p>
-The kernel has to know how to enable CPU frequency scaling on your processor.
-As each type of CPU has a different interface, you've got to choose the right
-driver for your processor. Be careful here - enabling <c>Intel Pentium 4 clock
-modulation</c> on a Pentium M system will lead to strange results for example.
-Consult the kernel documentation if you're unsure which one to take.
+It comes to no surprise that installation of the <e>Laptop Mode Tools</e>
+software is easily done through <c>emerge laptop-mode-tools</c>. However, this
+package takes on additional, optional settings through USE flag configuration.
+So let's first take a look at the supported USE flags and what they mean to the
+package.
</p>
+<table>
+<tr>
+ <th>USE flag</th>
+ <th>Description</th>
+ <th>Suggested when...</th>
+</tr>
+<tr>
+ <ti>acpi</ti>
+ <ti>
+ Depend on <c>sys-power/acpid</c> so that changes in the system are
+ captured and power saving features are automatically enabled/disabled.
+ </ti>
+ <ti>your laptop is not too old (~ year 2003 and later)</ti>
+</tr>
+<tr>
+ <ti>apm</ti>
+ <ti>
+ Depend on <c>sys-apps/apmd</c> so that changes in the system are captured
+ and power saving features are automatically enabled/disabled.
+ </ti>
+ <ti>your laptop is very old</ti>
+</tr>
+<tr>
+ <ti>bluetooth</ti>
+ <ti>
+ Depend on <c>net-wireless/bluez</c>, enabling the <c>laptop-mode-tools</c>
+ to manage bluetooth settings (enabling/disabling the service based on
+ battery availability)
+ </ti>
+ <ti>your laptop (and kernel) supports bluetooth</ti>
+</tr>
+<tr>
+ <ti>scsi</ti>
+ <ti>
+ Depend on <c>sys-apps/sdparm</c>, enabling the <c>laptop-mode-tools</c> to
+ manage SCSI (<e>and not</e> SATA) disk parameters.
+ </ti>
+ <ti>your laptop uses SCSI disks</ti>
+</tr>
+</table>
+
<p>
-Compile your kernel, make sure the right modules get loaded at startup and boot
-into your new ACPI-enabled kernel. Next run <c>emerge sys-power/acpid</c> to
-get the acpi daemon. This one informs you about events like switching from AC
-to battery or closing the lid. Make sure the modules are loaded if you didn't
-compile them into the kernel and start acpid by executing <c>/etc/init.d/acpid
-start</c>. Run <c>rc-update add acpid default</c> to load it on startup. You'll
-soon see how to use it.
+As you can see, there are two USE flags that seem to collide: <c>acpi</c> and
+<c>apm</c>. So what's the deal there?
</p>
-<pre caption="Installing acpid">
-# <i>emerge sys-power/acpid</i>
-# <i>/etc/init.d/acpid start</i>
-# <i>rc-update add acpid default</i>
-</pre>
+<ul>
+ <li>
+ The <c>apm</c> USE flag enables support for <e>Advanced Power
+ Management</e>, an older (before year 2000) standard for power management
+ features within a system.
+ </li>
+ <li>
+ The <c>acpi</c> USE flag enables support for <e>Advanced Configuration and
+ Power Interface</e>, the successor of APM. All modern laptops support ACPI.
+ </li>
+</ul>
-</body>
-</section>
-<section>
-<title>Creating A "battery" Runlevel</title>
-<body>
+<p>
+Depending on your system, you will either need <c>acpi</c> or <c>apm</c> set. In
+the remainder of this guide, we assume that your laptop is recent enough to use
+ACPI.
+</p>
<p>
-The default policy will be to enable Power Management only when needed -
-running on batteries. To make the switch between AC and battery convenient,
-create a runlevel <c>battery</c> that holds all the scripts starting and
-stopping Power Management.
+So, with the USE flags set, let's install <c>laptop-mode-tools</c>.
</p>
<note>
-You can safely skip this section if you don't like the idea of having another
-runlevel. However, skipping this step will make the rest a bit trickier to set
-up. The next sections assume a runlevel <c>battery</c> exists.
+If you have USE="acpi" set, the installation will pull in <c>acpid</c>. However,
+the current stable ACPI daemon (2.0.9) does not support the new ACPI interfaces
+within the Linux kernel (using the netlink interface). As such, we recommend
+unmasking <c>sys-power/acpid-2.0.12</c> (or higher). For more information about
+unmasking packages, please read
+<uri link="/doc/en/handbook/handbook-amd64.xml?part=3&chap=3">Mixing Software
+Branches</uri> in the Gentoo Handbook.
</note>
-<pre caption="Creating a battery runlevel">
-# <i>cd /etc/runlevels</i>
-# <i>cp -a default battery</i>
+<pre caption="Installing laptop-mode-tools">
+# <i>emerge laptop-mode-tools</i>
</pre>
-<p>
-Finished. Your new runlevel <c>battery</c> contains everything like
-<c>default</c>, but there is no automatic switch between both yet. Time to
-change it.
-</p>
-
</body>
</section>
<section>
-<title>Reacting On ACPI Events</title>
+<title>Configuration</title>
<body>
<p>
-Typical ACPI events are closing the lid, changing the power source or pressing
-the sleep button. An important event is changing the power source, which should
-cause a runlevel switch. A small script will take care of it.
-</p>
-
-<p>
-First you need a script which changes the runlevel to <c>default</c>
-respectively <c>battery</c> depending on the power source. The script uses the
-<c>on_ac_power</c> command from <c>sys-power/pm-utils</c> - make sure the
-package is installed on your system.
+Having <c>laptop-mode-tools</c> installed on your system does not automatically
+enable the power management features that you might need. To configure the
+package, first take a look at <path>/etc/laptop-mode/laptop-mode.conf</path>.
+This is the main configuration file for the package and is pretty well described
+(through comments).
</p>
-<pre caption="Installing pm-utils">
-# <i>emerge pm-utils</i>
-</pre>
-
-<p>
-You are now able to determine the power source by executing <c>on_ac_power
-&& echo AC available || echo Running on batteries</c> in a shell. The
-script below is responsible for changing runlevels. Save it as
-<path>/etc/acpi/actions/pmg_switch_runlevel.sh</path>.
-</p>
-
-<pre caption="/etc/acpi/actions/pmg_switch_runlevel.sh">
-#!/bin/bash
-
-# BEGIN configuration
-RUNLEVEL_AC="default"
-RUNLEVEL_BATTERY="battery"
-
-if [ -x /usr/bin/logger ]; then
- LOGGER="/usr/bin/logger -s -p daemon.info -t /etc/acpi/actions/pmg_switch_runlevel.sh"
-else
- LOGGER="/bin/echo"
-fi
-
-ON_AC_POWER=/usr/bin/on_ac_power
-# END configuration
-
-
-if [ ! -d "/etc/runlevels/${RUNLEVEL_AC}" ]
-then
- ${LOGGER} "${0}: Runlevel ${RUNLEVEL_AC} does not exist. Aborting."
- exit 1
-fi
-
-if [ ! -d "/etc/runlevels/${RUNLEVEL_BATTERY}" ]
-then
- ${LOGGER} "${0}: Runlevel ${RUNLEVEL_BATTERY} does not exist. Aborting."
- exit 1
-fi
-
-if ${on_ac_power}
-then
- if [[ "$(rc-status --runlevel)" != "${RUNLEVEL_AC}" ]]
- then
- ${LOGGER} "Switching to ${RUNLEVEL_AC} runlevel"
- /sbin/rc ${RUNLEVEL_AC}
- fi
-elif [[ "$(rc-status --runlevel)" != "${RUNLEVEL_BATTERY}" ]]
-then
- ${LOGGER} "Switching to ${RUNLEVEL_BATTERY} runlevel"
- /sbin/rc ${RUNLEVEL_BATTERY}
-fi
-</pre>
-
<p>
-Dont forget to run <c>chmod +x /etc/acpi/actions/pmg_switch_runlevel.sh</c> to
-make the script executable. The last thing that needs to be done is calling the
-script whenever the power source changes. That's done by catching ACPI events
-with the help of <c>acpid</c>. First you need to know which events are
-generated when the power source changes. The events are called
-<c>ac_adapter</c> and <c>battery</c> on most laptops, but it might be different
-on yours.
+But it is not the only configuration file to work with. The Laptop Mode Tools
+package supports plugins (or modules) which have their own configuration
+file(s). These files are located in <path>/etc/laptop-mode/conf.d</path> and are
+named after the module they represent (such as
+<path>intel-sata-powermgmt.conf</path>).
</p>
-<pre caption="Determining ACPI events for changing the power source">
-# <i>tail -f /var/log/messages | grep "ACPI event"</i>
-</pre>
-
<p>
-Run the command above and pull the power cable. You should see something like
-this:
+Now, one of the important settings in each configuration file is if the Laptop
+Mode Tools package should govern a particular setting or not. This is important
+when you want to combine <c>laptop-mode-tools</c> with other services like
+<c>cpufreqd</c>. In this example case, you will need to set
+<c>CONTROL_CPU_FREQUENCY=0</c>:
</p>
-<pre caption="Sample output for power source changes">
-[Tue Sep 20 17:39:06 2005] ACPI event "ac_adapter AC 00000080 00000000"
-[Tue Sep 20 17:39:06 2005] ACPI event "battery BAT0 00000080 00000001"
+<pre caption="Editing /etc/laptop-mode/conf.d/cpufreq.conf">
+# <i>nano -w /etc/laptop-mode/conf.d/cpufreq.conf</i>
+CONTROL_CPU_FREQUENCY=<i>0</i>
</pre>
<p>
-The interesting part is the quoted string after <c>ACPI event</c>. It will
-be matched by the event line in the files you are going to create below. Don't
-worry if your system generates multiple events or always the same. As long as
-any event is generated, runlevel changing will work.
+The next few sections will help you configure <c>laptop-mode-tools</c> to suit
+your needs. When you are finished, start the <c>laptop_mode</c> service and make
+sure it is started when you boot up your system.
</p>
-<pre caption="/etc/acpi/events/pmg_ac_adapter">
-<comment># replace "ac_adapter" below with the event generated on your laptop</comment>
-<comment># For example, ac_adapter.* will match ac_adapter AC 00000080 00000000</comment>
-event=ac_adapter.*
-action=/etc/acpi/actions/pmg_switch_runlevel.sh %e
+<pre caption="Starting the laptop_mode service">
+# <i>/etc/init.d/laptop_mode start</i>
+# <i>rc-update add laptop_mode default</i>
</pre>
-<pre caption="/etc/acpi/events/pmg_battery">
-<comment># replace "battery" below with the event generated on your laptop</comment>
-<comment># For example, battery.* will match battery BAT0 00000080 00000001</comment>
-event=battery.*
-action=/etc/acpi/actions/pmg_switch_runlevel.sh %e
-</pre>
+</body>
+</section>
+<section>
+<title>How does laptop-mode-tools work</title>
+<body>
<p>
-Finally acpid has to be restarted to recognize the changes.
+When running the <c>laptop_mode</c> service, the software will check in which
+state your system is in. The states are defined as:
</p>
-<pre caption="Finishing runlevel switching with acpid">
-# <i>/etc/init.d/acpid restart</i>
-</pre>
+<ul>
+ <li>
+ <e>Battery</e>, in the configuration files using the <c>BATT_</c> prefix, is
+ active when the system is running on battery power
+ </li>
+ <li>
+ <e>AC</e>, in the configuration files using the <c>AC_</c> prefix, is active
+ when the system is running on AC power
+ </li>
+ <li>
+ <e>Laptop Mode</e>, in the configuration files using the <c>LM_</c> prefix,
+ is active when <e>laptop mode</e> is enabled
+ </li>
+ <li>
+ <e>No Laptop Mode</e>, in the configuration files using the <c>NOLM_</c>
+ prefix, is active when <e>laptop mode</e> is disabled
+ </li>
+</ul>
<p>
-Give it a try: Plug AC in and out and watch syslog for the "Switching to AC
-mode" or "Switching to battery mode" messages. See the <uri
-link="#doc_chap8">Troubleshooting section</uri> if the script is not able to
-detect the power source correctly.
+The <c>AC/BATT_</c> and <c>LM/NOLM_</c> prefixes can be combined (so you can
+have a <c>AC_LM_</c> prefix).
</p>
<p>
-Due to the nature of the event mechanism, your laptop will boot into runlevel
-<c>default</c> regardless of the AC/battery state. This is fine when running
-from AC, but we'd like to boot into the battery runlevel otherwise. One
-solution would be to add another entry to the boot loader with the parameter
-<c>softlevel=battery</c>, but it's likely to forget choosing it. A better way
-is faking an ACPI event in the end of the boot process and letting
-<path>pmg_switch_runlevel.sh</path> script decide whether a runlevel change is
-necessary. Create a <path>/etc/local.d/battery.start</path> file with the
-following contents:
-</p>
-
-<pre caption="Runlevel adjustment at boot time through local.d/battery.start">
-#!/bin/sh
-<comment># Fake acpi event to switch runlevel if running on batteries</comment>
-/etc/acpi/actions/pmg_switch_runlevel.sh "battery/battery"
-</pre>
+When the <c>laptop_mode</c> service is started, it will switch modes based on
+events that occur (and of course based on the configuration settings). For
+instance, the setting <c>ENABLE_LAPTOP_MODE_ON_BATTERY=1</c> will make sure that
+the laptop mode tools switch to <e>laptop mode</e> when battery power is used.
+If that is the case, then the settings starting with <c>LM_</c>,
+<c>LM_BATT_</c>, <c>BATT_LM_</c> and <c>BATT_</c> will be used.
+</p>
<p>
-Don't forget to mark the file as executable (<c>chmod +x
-/etc/local.d/battery.start</c>). Prepared like this you can activate Power
-Management policies for individual devices.
+To make sure settings to not collide, it is not allowed to have overlapping
+settigns. In the next example, the first set (for <c>CPU_MAXFREQ</c>) is valid,
+but the second one (for <c>CPU_GOVERNOR</c>) isn't.
</p>
-</body>
-</section>
-</chapter>
-
-<chapter>
-<title>CPU Power Management</title>
-<section>
-<body>
+<pre caption="Colliding settings">
+<comment>## Valid set</comment>
+BATT_CPU_MAXFREQ=fastest
+LM_AC_CPU_MAXFREQ=fastest
+NOLM_AC_CPU_MAXFREQ=fastest
-<p>
-Mobile processors can operate at different frequencies. Some allow changing
-voltage as well. Most of the time your CPU doesn't need to run at full speed
-and scaling it down will save much energy - often without any performance
-decrease.
-</p>
+<comment>## Invalid set</comment>
+BATT_CPU_MINFREQ=fastest
+LM_AC_CPU_MINFREQ=fastest
+<comment># The following includes AC and BATT, but BATT is already defined</comment>
+NOLM_CPU_MINFREQ=fastest
+</pre>
</body>
</section>
<section>
-<title>Some Technical Terms</title>
+<title>Configuring CPU frequency management</title>
<body>
<p>
-CPU frequency scaling brings up some technical terms that might be unknown to
-you. Here's a quick introduction.
+The support for CPU frequency management in the laptop mode tools allows
+switching frequencies. It supports setting the CPU frequency governor, minimum
+frequency and maximum frequency. The configuration file used here is
+<path>/etc/laptop-mode/conf.d/cpufreq.conf</path>.
</p>
<p>
-First of all, the kernel has to be able to change the processor's frequency.
-The <b>CPUfreq processor driver</b> knows the commands to do it on your CPU.
-Thus it's important to choose the right one in your kernel. You should already
-have done it above. Once the kernel knows how to change frequencies, it has to
-know which frequency it should set. This is done according to the <b>policy</b>
-which consists of a <b>CPUfreq policy</b> and a <b>governor</b>. A CPUfreq
-policy are just two numbers which define a range the frequency has to stay
-between - minimal and maximal frequency. The governor now decides which of the
-available frequencies in between minimal and maximal frequency to choose. For
-example, the <b>powersave governor</b> always chooses the lowest frequency
-available, the <b>performance governor</b> the highest one. The <b>userspace
-governor</b> makes no decision but chooses whatever the user (or a program in
-userspace) wants - which means it reads the frequency from
-<path>/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed</path>.
+The <e>CPU frequency governor</e> is a kernel-level policy that defines how the
+kernel will select the CPU frequency. We already selected the governors we want
+to use in the kernel configuration earlier. Let's recap:
</p>
+<ul>
+ <li>
+ <c>performance</c> always picks the highest frequency
+ </li>
+ <li>
+ <c>powersave</c> always picks the lowest frequency
+ </li>
+ <li>
+ <c>userspace</c> does not pick anything, but let the user decide (or any
+ process that the user is running that will decide for the user)
+ </li>
+ <li>
+ <c>ondemand</c> will scale the CPU frequency up to the highest frequency
+ when load is available
+ </li>
+ <li>
+ <c>conservative</c> will scale the CPU frequency up gradually when load is
+ available
+ </li>
+</ul>
+
<p>
-This doesn't sound like dynamic frequency changes yet and in fact it isn't.
-Dynamics however can be accomplished with various approaches. For example, the
-<b>ondemand governor</b> makes its decisions depending on the current CPU load.
-The same is done by various userland tools like <c>cpudyn</c>, <c>cpufreqd</c>,
-<c>powernowd</c> and many more. ACPI events can be used to enable or disable
-dynamic frequency changes depending on power source.
+When switching between AC or battery, or (no) laptop mode, the appropriate
+governor (as well as its minimum and maximum frequency) is selected.
</p>
</body>
</section>
<section>
-<title>Setting The Frequency</title>
+<title>Configuring display brightness</title>
<body>
<p>
-Decreasing CPU speed and voltage has two advantages: On the one hand less
-energy is consumed, on the other hand there is thermal improvement as your
-system doesn't get as hot as running on full speed. The main disadvantage is
-obviously the loss of performance. Decreasing processor speed is a trade off
-between performance loss and energy saving.
+With <path>/etc/laptop-mode/conf.d/lcd-brightness.conf</path>, you can have the
+laptop mode tools govern the brightness of your LCD screen.
</p>
-<note>
-Not every laptop supports frequency scaling. If unsure, have a look at the list
-of supported processors in the <uri link="#doc_chap8">Troubleshooting</uri>
-section to verify yours is supported.
-</note>
-
<p>
-It's time to test whether CPU frequency changing works. Let's install another
-tool: <c>sys-power/cpufrequtils</c>.
+The file currently uses the <path>/proc/acpi/video/VID/LCD/brightness</path>
+file to set brightness values. Recent kernels do not provide this anymore -
+you will need to adjust this to <path>/sys/class/backlight/acpi_video0/brightness</path>
+instead.
</p>
-<pre caption="Checking CPU frequency">
-# <i>emerge cpufrequtils</i>
-# <i>cpufreq-info</i>
-</pre>
-
<p>
-Here is an example output:
+The values you can use are between 0 and 15, with 0 being the lowest brightness
+value.
</p>
-<pre caption="Sample output from cpufreq-info">
-cpufrequtils 0.3: cpufreq-info (C) Dominik Brodowski 2004
-Report errors and bugs to linux@brodo.de, please.
-analyzing CPU 0:
- driver: centrino
- CPUs which need to switch frequency at the same time: 0
- hardware limits: 600 MHz - 1.40 GHz
- available frequency steps: 600 MHz, 800 MHz, 1000 MHz, 1.20 GHz, 1.40 GHz
- available cpufreq governors: conservative, ondemand, powersave, userspace, performance
- current policy: frequency should be within 924 MHz and 1.40 GHz.
- The governor "performance" may decide which speed to use
- within this range.
- current CPU frequency is 1.40 GHz.
-</pre>
+</body>
+</section>
+<section>
+<title>Configuring other services</title>
+<body>
<p>
-Now play around with <c>cpufreq-set</c> to make sure frequency switching works.
-Run <c>cpufreq-set -g ondemand</c> for example to activate the ondemand
-governor and verify the change with <c>cpufreq-info</c>. If it doesn't work as
-expected, you might find help in the <uri link="#doc_chap8">Troubleshooting
-section</uri> in the end of this guide.
+An interesting feature of <c>laptop-mode-tools</c> is to support reloading
+particular services (like the system logger) after switching its configuration
+file. This is handled through
+<path>/etc/laptop-mode/conf.d/configuration-file-control.conf</path>.
</p>
<p>
-<c>cpufrequtils</c> can operate in an automatic mode (when you use the
-<b>ondemand</b> governor), you can also switch to the <b>userspace</b> governor
-if you want to manually set a specific speed. You can also statically set your
-CPU to its highest or lowest frequency by using the <b>performance</b>
-and <b>powersave</b> governors, respectively.
-</p>
-
-<pre caption="Changing CPU speeds">
-<comment>(Set the highest available frequency)</comment>
-# <i>cpufreq-set -g performance</i>
-<comment>(Set the lowest available frequency)</comment>
-# <i>cpufreq-set -g powersave</i>
-<comment>(Set a specific frequency)</comment>
-# <i>cpufreq-set -g userspace</i>
-# <i>cpufreq-set -f 2.00ghz</i>
-</pre>
+If enabled, the <c>laptop_mode</c> application will switch the configuration
+file(s) of the mentioned services with the same file, but suffixed with
+<path>-nolm-ac</path>, <path>-lm-ac</path> or <path>-batt</path>. It willl then
+signal or reload the appropriate services so they can use the new configuration
+file.
+</p>
</body>
</section>
+</chapter>
+
+<chapter>
+<title>Using cpufreqd</title>
<section>
-<title>Other CPU Speed Utilities</title>
+<title>Installation</title>
<body>
<p>
-While <c>cpufrequtils</c> may be the best all-around program, there are some
-other choices available in Portage. The following table gives a quick overview
-of available CPU speed utilities. It's roughly separated in three categories
-<b>kernel</b> for approaches that only need kernel support, <b>daemon</b> for
-programs that run in the background and <b>graphical</b> for programs that
-provide a GUI for easy configuration and changes.
+The <c>cpufreqd</c> application allows you to manage CPU frequencies in a more
+granular approach then what <c>laptop-mode-tools</c> supports. But before we
+dive into the installation of <c>cpufreqd</c>, let's first look at the USE flags
+it supports.
</p>
<table>
<tr>
- <th>Name</th>
- <th>Category</th>
- <th>Switch decision</th>
- <th>Kernel governors</th>
- <th>Further governors</th>
- <th>Comments</th>
+ <th>USE flag</th>
+ <th>Description</th>
+ <th>Suggested when...</th>
</tr>
<tr>
- <ti>'ondemand' governor</ti>
- <ti>Kernel</ti>
- <ti>CPU load</ti>
- <ti>N.A.</ti>
- <ti>N.A.</ti>
+ <ti>acpi</ti>
<ti>
- Chooses maximal frequency on CPU load and slowly steps down when the CPU is
- idle. Further tuning through files in
- <path>/sys/devices/system/cpu/cpu0/cpufreq/ondemand/</path>. Still requires
- userland tools (programs, scripts) if governor switching or similar is
- desired.
+ Enable support for ACPI, allowing <c>cpufreqd</c> to be notified about
+ specific events as well as govern power through the ACPI interface
</ti>
+ <ti>your laptop is not too old (~ year 2003 and later)</ti>
</tr>
<tr>
- <ti>'conservative' governor</ti>
- <ti>Kernel</ti>
- <ti>CPU load</ti>
- <ti>N.A.</ti>
- <ti>N.A.</ti>
+ <ti>apm</ti>
<ti>
- Unlike the ondemand governor, conversative doesn't jump to maximum
- frequency when CPU load is high, but increases the frequency step by step.
- Further tuning through files in
- <path>/sys/devices/system/cpu/cpu0/cpufreq/ondemand/</path>. Still requires
- userland tools (programs, scripts) if governor switching or similar is
- desired.
+ Enable support for APM, allowing <c>cpufreqd</c> to be notified about
+ specific events as wel as govern power through the APM interface
</ti>
+ <ti>your laptop is very old</ti>
</tr>
<tr>
- <ti><uri link="http://mnm.uib.es/~gallir/cpudyn/">cpudyn</uri></ti>
- <ti>Daemon</ti>
- <ti>CPU load</ti>
- <ti>Performance, powersave</ti>
- <ti>Dynamic</ti>
+ <ti>lm_sensors</ti>
<ti>
- Also supports disk standby - notice however that <e>laptop mode</e> in most
- cases will do a better job.
+ Enable support for the Linux hardware sensors (through
+ <c>sys-apps/lm_sensors</c>), allowing to switch profiles based on hardware
+ sensor results
</ti>
-</tr>
-<tr>
- <ti><uri link="http://sourceforge.net/projects/cpufreqd/">cpufreqd</uri></ti>
- <ti>Daemon</ti>
- <ti>Battery state, CPU load, temperature, running programs and more</ti>
- <ti>All available</ti>
- <ti>None</ti>
<ti>
- Sophisticated (but somewhat complicated) setup. Extendible through plugins
- like sensor monitoring (lm_sensors) or coordinating some NVidia based
- graphics card memory and core. Cpufreqd is SMP aware and can optionally be
- controlled manually at runtime.
+ you want to use advanced events through lm_sensors
</ti>
</tr>
<tr>
+ <ti>nforce2</ti>
<ti>
- <uri link="http://www.deater.net/john/powernowd.html">powernowd</uri>
+ Enable support for NForce, allowing <c>cpufreqd</c> to change the NForce FSB
+ clock and video card frequency
</ti>
- <ti>Daemon</ti>
- <ti>CPU load</ti>
- <ti>None</ti>
- <ti>Passive, sine, aggressive</ti>
<ti>
- Supports SMP.
+ you have an NVidia graphical card based on the NForce chipset
</ti>
</tr>
<tr>
+ <ti>nvidia</ti>
<ti>
- <uri
- link="http://projects.simpledesigns.com.pl/project/ncpufreqd/">ncpufreqd</uri>
- </ti>
- <ti>Daemon</ti>
- <ti>Temperature</ti>
- <ti>None</ti>
- <ti>Powersave, performance</ti>
- <ti>
- Toggles the used governor between performance and powersave depending on
- system temperature. Very useful on laptops with notorious heat problems.
+ Enable support for NVidia graphical card configuration (through the NVidia
+ <e>nvclock</e> interface), allowing <c>cpufreqd</c> to change the video card
+ frequency of NVidia graphical cards
</ti>
-</tr>
-<tr>
- <ti><uri link="http://www.goop.org/~jeremy/speedfreq/">speedfreq</uri></ti>
- <ti>Daemon</ti>
- <ti>CPU load</ti>
- <ti>None</ti>
- <ti>Dynamic, powersave, performance, fixed speed</ti>
<ti>
- Easy to configure with a nice client/server interface. Requires a 2.6
- kernel. Unmaintained, broken and thus removed from Portage. Please switch
- to cpufreqd if you're still using it.
+ you have an NVidia graphical card
</ti>
</tr>
<tr>
- <ti><uri link="http://cpuspeedy.sourceforge.net/">gtk-cpuspeedy</uri></ti>
- <ti>Graphical</ti>
- <ti>None</ti>
- <ti>None</ti>
- <ti>None</ti>
+ <ti>pmu</ti>
<ti>
- Gnome application, a graphical tool to set CPU frequency manually. It does
- not offer any automation.
+ Enable the Power Management Unit plug-in of <c>cpufreqd</c>. This allows the
+ software to poll the Linux kernel Power Supply interface, getting more
+ detailed information on battery charge.
</ti>
-</tr>
-<tr>
- <ti>klaptopdaemon</ti>
- <ti>Graphical</ti>
- <ti>Battery state</ti>
- <ti>All available</ti>
- <ti>None</ti>
<ti>
- KDE only, 'ondemand' governor required for dynamic frequency scaling.
+ your laptop does not support ACPI or APM
</ti>
</tr>
</table>
<p>
-While adjusting the frequency to the current load looks simple at a first
-glance, it's not such a trivial task. A bad algorithm can cause switching
-between two frequencies all the time or wasting energy when setting frequency
-to an unnecessary high level.
+The USE flags <c>acpi</c>, <c>apm</c> and <c>pmu</c> overlap, so you should only
+have one active. If your laptop is sufficiently recent, <c>acpi</c> is your best
+bet. If not, <c>apm</c> offers all that is needed. When even APM isn't
+supported, you can try <c>pmu</c>.
</p>
<p>
-Which one to choose? If you have no idea about it, try <c>cpufreqd</c>:
+With the USE flags configured, it is time to install <c>cpufreqd</c>.
</p>
<pre caption="Installing cpufreqd">
# <i>emerge cpufreqd</i>
</pre>
-<p>
-<c>cpufreqd</c> can be configured by editing <path>/etc/cpufreqd.conf</path>.
-The default one that ships with cpufreqd may look a bit confusing. I recommend
-replacing it with the one from former Gentoo developer Henrik Brix Andersen
-(see below). Please notice that you need cpufreqd-2.0.0 or later. Earlier
-versions have a different syntax for the config file.
-</p>
-
-<pre caption="/etc/cpufreqd.conf (cpufreqd-2.0.0 and later)">
-[General]
-pidfile=/var/run/cpufreqd.pid
-poll_interval=3
-enable_plugins=acpi_ac, acpi_battery
-enable_remote=1
-remote_group=wheel
-verbosity=5
-[/General]
-
-[Profile]
-name=ondemand
-minfreq=0%
-maxfreq=100%
-policy=ondemand
-[/Profile]
-
-[Profile]
-name=conservative
-minfreq=0%
-maxfreq=100%
-policy=conservative
-[/Profile]
-
-[Profile]
-name=powersave
-minfreq=0%
-maxfreq=100%
-policy=powersave
-[/Profile]
-
-[Profile]
-name=performance
-minfreq=0%
-maxfreq=100%
-policy=performance
-[/Profile]
-
-[Rule]
-name=battery
-ac=off
-profile=conservative
-[/Rule]
-
-[Rule]
-name=battery_low
-ac=off
-battery_interval=0-10
-profile=powersave
-[/Rule]
-
-[Rule]
-name=ac
-ac=on
-profile=ondemand
-[/Rule]
-</pre>
-
-<p>
-Now you can start the cpufreqd daemon. Add it to the <c>default</c> and
-<c>battery</c> runlevel as well.
-</p>
-
-<pre caption="Starting cpufreqd">
-# <i>rc-update add cpufreqd default battery</i>
-# <i>/etc/init.d/cpufreqd start</i>
-</pre>
-
-<p>
-Sometimes it can be desirable to select another policy than the daemon chooses,
-for example when battery power is low, but you know that AC will be available
-soon. In that case you can turn on cpufreqd's manual mode with <c>cpufreqd-set
-manual</c> and select one of your configured policies (as listed by
-<c>cpufreqd-get</c>). You can leave manual mode by executing <c>cpufreqd-set
-dynamic</c>.
-</p>
-
-<warn>
-Do not run more than one of the above programs at the same time. It may cause
-confusion like switching between two frequencies all the time.
-</warn>
-
</body>
</section>
<section>
-<title>Verifying the result</title>
+<title>Configuration</title>
<body>
<p>
-The last thing to check is that your new policies do a good job. An easy way to
-do so is monitoring CPU speed while working with your laptop:
-</p>
-
-<pre caption="Monitoring CPU speed">
-# <i>watch grep \"cpu MHz\" /proc/cpuinfo</i>
-</pre>
-
-<p>
-If <path>/proc/cpuinfo</path> doesn't get updated (see <uri
-link="#doc_chap8">Troubleshooting</uri>), monitor the CPU frequency with
-<c>sys-apps/x86info</c>:
+The <c>cpufreqd</c> application monitors the status of the system through
+several plugins. Based on the feedback it receives from those plugins, it will
+adjust the policy used to govern the CPU frequency.
</p>
-<pre caption="Alternative CPU speed monitoring">
-# <i>watch x86info -mhz</i>
-</pre>
-
<p>
-Depending on your setup, CPU speed should increase on heavy load, decrease on
-no activity or just stay at the same level. When using <c>cpufreqd</c> and
-verbosity set to 5 or higher in <path>cpufreqd.conf</path> you'll get
-additional information about what's happening reported to <c>syslog</c>.
+<c>cpufreqd</c> can be configured by editing <path>/etc/cpufreqd.conf</path>. It
+contains three different sections:
</p>
-</body>
-</section>
-</chapter>
-
-<chapter>
-<title>LCD Power Management</title>
-<section>
-<body>
+<ol>
+ <li>
+ The <c>[General]...[/General]</c> section contains general configuration
+ information
+ </li>
+ <li>
+ The <c>[Profile]...[/Profile]</c> section defines the policies that the
+ <c>cpufreqd</c> daemon can switch to. The section is very similar to the
+ information you use when manually setting the CPU frequency policy using
+ <c>cpufreq-set</c>.
+ </li>
+ <li>
+ The <c>[Rule]...[/Rule]</c> section is the work-horse of the <c>cpufreqd</c>
+ daemon, defining when the daemon decides to switch to a different profile.
+ </li>
+</ol>
<p>
-As you can see in <uri link="#doc_chap1_fig1">figure 1.1</uri>, the LCD
-display consumes the biggest part of energy (might not be the case for
-non-mobile CPU's). Thus it's quite important not only to shut the display off
-when not needed, but also to reduce it's backlight if possible. Most laptops
-offer the possibility to control the backlight dimming.
+Let's take a quick look at an example rule.
</p>
-</body>
-</section>
-<section>
-<title>Standby settings</title>
-<body>
+<pre caption="Sample cpufreqd rule">
+[Profile]
+name=On Demand High
+minfreq=40%
+maxfreq=100%
+policy=ondemand
+[/Profile]
-<p>
-The first thing to check is the standby/suspend/off timings of the display. As
-this depends heavily on your windowmanager, I'll let you figure it out
-yourself. Just two common places: Blanking the terminal can be done with
-<c>setterm -blank <number-of-minutesM></c>, <c>setterm -powersave on</c>
-and <c>setterm -powerdown <number-of-minutesM></c>. For X.org, modify
-<path>/etc/X11/xorg.conf</path> similar to this:
-</p>
-
-<pre caption="LCD suspend settings in X.org">
-Section "ServerFlags"
- Option "blank time" "5" <comment># Blank the screen after 5 minutes (Fake)</comment>
- Option "standby time" "10" <comment># Turn off screen after 10 minutes (DPMS)</comment>
- Option "suspend time" "20" <comment># Full suspend after 20 minutes</comment>
- Option "off time" "30" <comment># Turn off after half an hour</comment>
- [...]
-EndSection
-
-[...]
-
-Section "Monitor"
- Identifier [...]
- Option "DPMS"
- [...]
-EndSection
+[Rule]
+name=AC Off - High Power
+ac=off
+battery_interval=70-100
+profile=On Demand High
+[/Rule]
</pre>
-</body>
-</section>
-<section>
-<title>Backlight dimming</title>
-<body>
-
<p>
-Probably more important is the backlight dimming. If you have access to the
-dimming settings via a tool, write a small script that dims the backlight in
-battery mode and place it in your <c>battery</c> runlevel. The following script
-should work on most IBM Thinkpads and Toshiba laptops. You've got to enable the
-appropriate option in your kernel (IBM Thinkpads only). For Toshiba laptops,
-install <c>sys-power/acpitool</c> and skip configuration of <c>thinkpad_acpi</c>
-(formerly called <c>ibm_acpi</c>) as described below.
-</p>
-
-<warn>
-Support for setting brightness is marked experimental in thinkpad_acpi. It
-accesses hardware directly and may cause severe harm to your system. Please
-read the <uri link="http://ibm-acpi.sourceforge.net/">thinkpad_acpi
-website</uri>
-</warn>
-
-<p>
-To be able to set the brightness level, the thinkpad_acpi module has to be
-loaded with the experimental parameter.
-</p>
-
-<pre caption="Automatically loading the thinkpad_acpi module">
-<comment>(Please read the warnings above before doing this!)</comment>
-
-# <i>echo "options thinkpad_acpi experimental=1" >> /etc/modprobe.d/thinkpad_acpi</i>
-# <i>update-modules</i>
-# <i>nano /etc/conf.d/modules</i>
-<comment># Autoload the thinkpad_acpi module</comment>
-modules_2_6="thinkpad_acpi"
-<comment># Parameters for the thinkpad_acpi module</comment>
-modules_thinkpad_acpi_args_2_6="experimental=1"
-
-# <i>modprobe thinkpad_acpi</i>
-</pre>
+In the above example, <c>cpufreqd</c> will switch the system to the <e>On Demand
+High</e> profile (also shown in the above excerpt). This profile by itself uses
+the <c>ondemand</c> governor with a minimum frequency of 40% (iow, a CPU of 2Ghz
+will have by this policy a minimum frequency of 800Mhz).
+</p>
<p>
-This should work without error messages and a file
-<path>/proc/acpi/ibm/brightness</path> should be created after loading the
-module. An init script will take care of choosing the brightness according to
-the power source.
+As you can see, the <c>cpufreqd</c> application can offer a more granular
+approach on CPU frequency scaling. But not only that, you can tweak the CPU
+frequency scaling based on various other metrics available. The default
+configuration offers a sample rule for when you watch a movie, where you want
+maximum performance, unless the CPU temperature is getting too high.
</p>
-<pre caption="/etc/conf.d/lcd-brightness">
-<comment># See /proc/acpi/ibm/brightness for available values</comment>
-<comment># Please read /usr/src/linux/Documentation/thinkpad-acpi.txt</comment>
-
-<comment># brightness level in ac mode. Default is 7.</comment>
-BRIGHTNESS_AC=7
-
-<comment># brightness level in battery mode. Default is 4.</comment>
-BRIGHTNESS_BATTERY=4
-</pre>
-
-<pre caption="/etc/init.d/lcd-brightness">
-#!/sbin/runscript
-
-set_brightness() {
- if on_ac_power
- then
- LEVEL=${BRIGHTNESS_AC:-7}
- else
- LEVEL=${BRIGHTNESS_BATTERY:-4}
- fi
-
- if [ -f /proc/acpi/ibm/brightness ]
- then
- ebegin "Setting LCD brightness"
- echo "level ${LEVEL}" > /proc/acpi/ibm/brightness
- eend $?
- elif [[ -e /usr/bin/acpitool && -n $(acpitool -T | grep "LCD brightness") ]]
- then
- ebegin "Setting LCD brightness"
- acpitool -l $LEVEL >/dev/null || ewarn "Unable to set lcd brightness"
- eend $?
- else
- ewarn "Setting LCD brightness is not supported."
- ewarn "For IBM Thinkpads, check that thinkpad_acpi is loaded into the kernel"
- ewarn "For Toshiba laptops, you've got to install sys-power/acpitool"
- fi
-}
-
-start() {
- set_brightness
-}
-
-stop () {
- set_brightness
-}
-</pre>
-
<p>
-When done, make sure brightness is adjusted automatically by adding it to the
-battery runlevel.
+When you have configured <c>cpufreqd</c>, it is time to start it (and make sure
+the service is loaded automatically). Make sure that CPU frequency handling by
+other tools (like <c>laptop-mode-tools</c>) is disabled!
</p>
-<pre caption="Enabling automatic brightness adjustment">
-# <i>chmod +x /etc/init.d/lcd-brightness</i>
-# <i>rc-update add lcd-brightness battery</i>
-# <i>rc</i>
+<pre caption="Starting cpufreqd">
+# <i>rc-service add cpufreqd default</i>
+# <i>/etc/init.d/cpufreqd start</i>
</pre>
</body>
@@ -993,722 +643,40 @@
</chapter>
<chapter>
-<title>Disk Power Management</title>
-<section>
-<body>
-
-<p>
-Hard disks consume less energy in sleep mode. Therefore it makes sense to
-activate power saving features whenever the hard disk is not used for a certain
-amount of time. I'll show you two alternative possibilities to do it. First,
-laptop-mode will save most energy due to several measures which prevent or at
-least delay write accesses. The drawback is that due to the delayed write
-accesses a power outage or kernel crash will be more dangerous for data loss.
-If you don't like this, you have to make sure that there are no processes which
-write to your hard disk frequently. Afterwards you can enable power saving
-features of your hard disk with <c>hdparm</c> as the second alternative.
-</p>
-
-</body>
-</section>
+<title>Resources</title>
<section>
-<title>Increasing idle time - laptop-mode</title>
+<title>Tools</title>
<body>
-<p>
-Recent 2.6 kernels include the so-called <c>laptop-mode</c>. When activated,
-dirty buffers are written to disk on read calls or after 10 minutes (instead of
-30 seconds). This minimizes the time the hard disk needs to be spun up.
-</p>
-
-<pre caption="Automated start of laptop-mode">
-# <i>emerge laptop-mode-tools</i>
-</pre>
-
-<p>
-<c>laptop-mode-tools</c> has its configuration file in
-<path>/etc/laptop-mode/laptop-mode.conf</path>. Adjust it the way you like it,
-it's well commented. Run <c>rc-update add laptop_mode battery</c> to start it
-automatically.
-</p>
-
-<p>
-Recent versions (1.11 and later) of laptop-mode-tools include a new tool
-<c>lm-profiler</c>. It will monitor your system's disk usage and running
-network services and suggests to disable unneeded ones. You can either disable
-them through laptop-mode-tools builtin runlevel support (which will be reverted
-by Gentoo's <c>/sbin/rc</c>) or use your <c>default</c>/<c>battery</c>
-runlevels (recommended).
-</p>
-
-<pre caption="Sample output from running lm-profiler">
-# <i>lm-profiler</i>
-Profiling session started.
-Time remaining: 600 seconds
-[4296896.602000] amarokapp
-Time remaining: 599 seconds
-[4296897.714000] sort
-[4296897.970000] mv
-Time remaining: 598 seconds
-Time remaining: 597 seconds
-[4296900.482000] reiserfs/0
-</pre>
-
-<p>
-After profiling your system for ten minutes, lm-profiler will present a list of
-services which might have caused disk accesses during that time.
-</p>
-
-<pre caption="lm-profiler suggests to disable some services">
-Program: "atd"
-Reason: standard recommendation (program may not be running)
-Init script: /etc/init.d/atd (GUESSED)
-
-Do you want to disable this service in battery mode? [y/N]: <i>n</i>
-</pre>
-
-<p>
-To disable atd as suggested in the example above, you would run <c>rc-update
-del atd battery</c>. Be careful not to disable services that are needed for
-your system to run properly - <c>lm-profiler</c> is likely to generate some
-false positives. Do not disable a service if you are unsure whether it's
-needed.
-</p>
+<ul>
+ <li>
+ <uri link="http://samwel.tk/laptop_mode/">Laptop Mode Tools Homepage</uri>,
+ includes <uri link="http://samwel.tk/laptop_mode/laptop_mode">About laptop
+ mode</uri>.
+ </li>
+ <li>
+ <uri link="http://www.lesswatts.org/projects/powertop/">PowerTOP</uri>, an
+ interactive application helping users to find out which processes are
+ forcing wakeups on the CPU most often.
+ </li>
+</ul>
</body>
</section>
<section>
-<title>Limiting Write Accesses</title>
+<title>Articles and Guides</title>
<body>
-<p>
-If you don't want to use laptop-mode, you must take special care to disable
-services that write to your disk frequently - <c>syslogd</c> is a good
-candidate, for example. You probably don't want to shut it down completely, but
-it's possible to modify the config file so that "unnecessary" things don't get
-logged and thus don't create disk traffic. <c>Cups</c> writes to disk
-periodically, so consider shutting it down and only enable it manually when
-needed.
-</p>
-
-<pre caption="Disabling cups in battery mode">
-# <i>rc-update del cupsd battery</i>
-</pre>
-
-<p>
-You can also use <c>lm-profiler</c> from laptop-mode-tools (see above) to find
-services to disable. Once you eliminated all of them, go on with configuring
-hdparm.
-</p>
-
-</body>
-</section>
-<section>
-<title>hdparm</title>
-<body>
-
-<p>
-The second possibility is using <c>hdparm</c>. Skip this if
-you are using laptop-mode. Otherwise, edit <path>/etc/conf.d/hdparm</path> and
-add the following values to your drive entries. This example assumes your hard
-drive is called <b>hda</b>:
-</p>
-
-<pre caption="Using /etc/conf.d/hdparm for disk standby">
-hda_args="-q -S12"
-</pre>
-
-<p>
-This will activate power management for your hard drive. If you ever want to
-deactivate power management, you can edit <path>/etc/conf.d/hdparm</path> and
-change the values to <c>-q -S0</c>, or just run <c>hdparm -q -S0 /dev/hda</c>.
-</p>
-
-<p>
-See <c>man hdparm</c> for the options. Though you can always start <c>hdparm</c>
-manually when you are on battery power by running <c>/etc/init.d/hdparm
-start</c>, it's much easier to automate its startup and shutdown. To do so, add
-<c>hdparm</c> to the battery runlevel so that it will automatically enable power
-management.
-</p>
-
-<pre caption="Automate disk standby settings">
-# <i>rc-update add hdparm battery</i>
-</pre>
-
-<impo>
-Be careful with sleep/spin down settings of your hard drive. Setting it to
-small values might wear out your drive and lose warranty.
-</impo>
-
-</body>
-</section>
-<section>
-<title>Other tricks</title>
-<body>
-
-<p>
-Another possibility is to deactivate swap in battery mode. Before writing a
-swapon/swapoff switcher, make sure there is enough RAM and swap isn't used
-heavily, otherwise you'll be in big problems.
-</p>
-
-<p>
-If you don't want to use laptop-mode, it's still possible to minimize disk
-access by mounting certain directories as <c>tmpfs</c> - write accesses are not
-stored on a disk, but in main memory and get lost with unmounting. Often it's
-useful to mount <path>/tmp</path> like this - you don't have to pay special
-attention as it gets cleared on every reboot regardless whether it was mounted
-on disk or in RAM. Just make sure you have enough RAM and no program (like a
-download client or compress utility) needs extraordinary much space in
-<path>/tmp</path>. To activate this, enable tmpfs support in your kernel and
-add a line to <path>/etc/fstab</path> like this:
-</p>
-
-<pre caption="Editing /etc/fstab to make /tmp even more volatile">
-none /tmp tmpfs size=32m 0 0
-</pre>
-
-<warn>
-Pay attention to the size parameter and modify it for your system. If you're
-unsure, don't try this at all, it can become a performance bottleneck easily. In
-case you want to mount <path>/var/log</path> like this, make sure to merge the
-log files to disk before unmounting. They are essential. Don't attempt to mount
-<path>/var/tmp</path> like this. Portage uses it for compiling...
-</warn>
-
-</body>
-</section>
-</chapter>
-
-<chapter>
-<title>Power Management For Other Devices</title>
-<section>
-<title>Graphics Cards</title>
-<body>
-
-<p>
-In case you own an ATI graphics card supporting PowerPlay (dynamic clock
-scaling for the graphics processing unit GPU), you can activate this
-feature in X.org. Open <path>/etc/X11/xorg.conf</path> and add (or enable) the
-<c>DynamicClocks</c> option in the Device section. Please notice that this
-feature will lead to crashes on some systems.
-</p>
-
-<pre caption="Enabling ATI PowerPlay support in X.org">
-Section "Device"
-[...]
-Option "DynamicClocks" "on"
-EndSection
-</pre>
-
-</body>
-</section>
-<section>
-<title>Wireless Power Management</title>
-<body>
-
-<p>
-Wireless LAN cards consume quite a bit of energy. Put them in Power Management
-mode just like your hard drives.
-</p>
-
-<note>
-This script assumes your wireless interface is called <c>wlan0</c>; replace
-this with the actual name of your interface.
-</note>
-
-<p>
-Add the following option to <path>/etc/conf.d/net</path> to automatically enable
-power management for your wireless card:
-</p>
-
-<pre caption="Automated WLAN Power Management">
-iwconfig_wlan0="power on"
-</pre>
-
-<p>
-See <c>man iwconfig</c> for details and more options like the period between
-wakeups or timeout settings. If your driver and access point support changing
-the beacon time, this is a good starting point to save even more energy.
-</p>
-
-</body>
-</section>
-<section>
-<title>USB Power Management</title>
-<body>
-
-<p>
-There are two problems with USB devices regarding energy consumption: First,
-devices like USB mice, digital cameras or USB sticks consume energy while
-plugged in. You cannot avoid this (nevertheless remove them in case they're not
-needed). Second, when there are USB devices plugged in, the USB host controller
-periodically accesses the bus which in turn prevents the CPU from going into
-sleep mode. The kernel offers an experimental option to enable suspension of
-USB devices through driver calls or one of the <path>power/state</path> files
-in <path>/sys</path>.
-</p>
-
-<pre caption="Enabling USB suspend support in the kernel">
-Device Drivers
- USB support
- [*] Support for Host-side USB
- [*] USB suspend/resume (EXPERIMENTAL)
-</pre>
-
-</body>
-</section>
-</chapter>
-
-<chapter>
-<title>Sleep States: sleep, standby, and suspend to disk</title>
-<section>
-<body>
-
-<p>
-ACPI defines different sleep states. The more important ones are
-</p>
-
<ul>
- <li>S1 aka Standby</li>
- <li>S3 aka Suspend to RAM aka Sleep</li>
- <li>S4 aka Suspend to Disk aka Hibernate</li>
+ <li>
+ A ThinkWiki article on <uri
+ link="http://www.thinkwiki.org/wiki/How_to_reduce_power_consumption">How to
+ reduce power consumption</uri> (on Linux). This article offers an exhaustive
+ list of measures one can take. However, it should be noted that the laptop
+ mode tools implements the majority of these (if properly configured).
+ </li>
</ul>
-<p>
-They can be called whenever the system is not in use, but a shutdown is not
-wanted due to the long boot time.
-</p>
-
-</body>
-</section>
-<section>
-<title>Sleep (S3)</title>
-<body>
-
-<p>
-The ACPI support for these sleep states is marked experimental for good reason.
-APM sleep states seem to be more stable, however you can't use APM and ACPI
-together.
-</p>
-
-<pre caption="Kernel configuration for the various suspend types">
- Power Management Options --->
- [*] Power Management support
- [*] Suspend to RAM and standby
-</pre>
-
-<p>
-Once your kernel is properly configured, you can use the
-<c>hibernate-script</c> to activate suspend or sleep mode. Let's install that
-first.
-</p>
-
-<pre caption="Installing the hibernate-script">
-# <i>emerge hibernate-script</i>
-</pre>
-
-<p>
-Some configuration has to be done in <path>/etc/hibernate</path>. The default
-package introduces a few configuration files for each sleep state. Options that
-are common to all suspend methods are placed in <path>common.conf</path>; make
-sure this file is properly set up for your system.
-</p>
-
-<p>
-To configure sleep, edit <path>sysfs-ram.conf</path> in
-<path>/etc/hibernate</path>. <c>UseSysfsPowerState mem</c> is already setup
-correctly, but if you need to make further changes to this particular sleep
-state (or any other sleep state) you should add them to
-<path>/etc/hibernate/hibernate.conf</path>. The comments and option names will
-guide you. If you use nfs or samba shares over the network, make sure to
-shutdown the appropriate init scripts to avoid timeouts.
-</p>
-
-<note>
-For more information on setting up sleep states, read <c>man
-hibernate.conf</c>.
-</note>
-
-<p>
-Ready? Now is the last chance to backup any data you want to keep after
-executing the next command. Notice that you probably have to hit a special key
-like <c>Fn</c> to resume from sleep.
-</p>
-
-<pre caption="Calling sleep">
-# <i>hibernate-ram</i>
-</pre>
-
-<p>
-If you're still reading, it seems to work. You can also setup standby (S1) in a
-similar way by editing <path>sysfs-ram.conf</path> and changing
-"UseSysfsPowerState mem" to "UseSysfsPowerState standby". S3 and S4 are the more
-interesting sleep states due to greater energy savings however.
-</p>
-
-</body>
-</section>
-<section>
-<title>Hibernate (S4)</title>
-<body>
-
-<p>
-This section introduces hibernation, where a snapshot of the running system is
-written to disk before powering off. On resume, the snapshot is loaded and you
-can go on working at exactly the point you called hibernate before.
-</p>
-
-<warn>
-Don't exchange non hot-pluggable hardware when suspended. Don't attempt to load
-a snapshot with a different kernel image than the one it was created with.
-Shutdown any NFS or samba server/client before hibernating.
-</warn>
-
-<p>
-There are two different implementations for S4. The original one is swsusp,
-then there is the newer tuxonice (formerly suspend2) with a nicer interface
-(including fbsplash support). A <uri
-link="http://tuxonice.net/features.html#compare">feature comparison</uri> is
-available at the <uri link="http://www.tuxonice.net">tuxonice homepage</uri>.
-There used to be Suspend-to-Disk (pmdisk), a fork of swsusp, but it has been
-merged back.
-</p>
-
-<p>
-TuxOnIce is not included in the mainline kernel yet, therefore you either have
-to patch your kernel sources with the patches provided by <uri
-link="http://www.tuxonice.net">tuxonice.net</uri> or use
-<c>sys-kernel/tuxonice-sources</c>.
-</p>
-
-<p>
-The kernel part for both swusp and TuxOnIce is as follows:
-</p>
-
-<pre caption="Kernel configuration for the various suspend types">
-Power Management support --->
- <comment>(hibernate with swsusp)</comment>
- [*] Hibernation (aka 'suspend to disk')
- <comment>(replace /dev/SWAP with your swap partition)</comment>
- (/dev/SWAP) Default resume partition
-
- <comment>(hibernate with TuxOnIce)</comment>
- Enhanced Hibernation (TuxOnIce)
- --- Image Storage (you need at least one allocator)
- [*] File Allocator
- [*] Swap Allocator
- --- General Options
- [*] Compression support
- [ ] Allow Keep Image Mode
- [*] Replace swsusp by default
-</pre>
-
-<p>
-The configuration for swsusp is rather easy. If you didn't store the location
-of your swap partition in the kernel config, you can also pass it as a
-parameter with the <c>resume=/dev/SWAP</c> directive. If booting is not
-possible due to a broken image, use the <c>noresume</c> kernel parameter. The
-<c>hibernate-cleanup</c> init script invalidates swsusp images during the boot
-process.
-</p>
-
-<pre caption="Invalidating swsusp images during the boot process">
-# <i>rc-update add hibernate-cleanup boot</i>
-</pre>
-
-<p>
-To activate hibernate with swsusp, use the hibernate script and set
-<c>UseSysfsPowerState disk</c> in <path>/etc/hibernate/sysfs-disk</path>.
-</p>
-
-<warn>
-Backup your data before doing this. Run <c>sync</c> before executing one of the
-commands to have cached data written to disk. First try it outside of X, then
-with X running, but not logged in.
-</warn>
-
-<p>
-If you experience kernel panics due to uhci or similar, try to compile USB
-support as module and unload the modules before sending your laptop to sleep
-mode. There are configuration options for this in <path>common.conf</path>
-</p>
-
-<pre caption="Hibernating with swsusp">
-# <i>nano -w /etc/hibernate/common.conf</i>
-<comment>(Make sure you have a backup of your data)</comment>
-# <i>hibernate</i>
-</pre>
-
-<p>
-The following section discusses the setup of TuxOnIce including fbsplash support
-for a nice graphical progress bar during suspend and resume.
-</p>
-
-<p>
-The first part of the configuration is similar to the configuration of swsusp.
-In case you didn't store the location of your swap partition in the kernel
-config, you have to pass it as a kernel parameter with the
-<c>resume=swap:/dev/SWAP</c> directive. If booting is not possible due to a
-broken image, append the <c>noresume</c> parameter. Additionally, the
-<c>hibernate-cleanup</c> init script invalidates TuxOnIce images during the boot
-process.
-</p>
-
-<pre caption="Invalidating TuxOnIce images during the boot process">
-# <i>rc-update add hibernate-cleanup boot</i>
-</pre>
-
-<p>
-Now edit <path>/etc/hibernate/tuxonice.conf</path>, enable the <c>TuxOnIce</c>
-options you need. Do not enable the <c>fbsplash</c> options in
-<c>common.conf</c> just yet.
-</p>
-
-<pre caption="Hibernating with TuxOnIce">
-# <i>nano -w /etc/hibernate/tuxonice.conf</i>
-<comment>(Make sure you have a backup of your data)</comment>
-# <i>hibernate</i>
-</pre>
-
-<p>
-Please configure <c>fbsplash</c> now if you didn't do already. To enable
-fbsplash support during hibernation, the <c>sys-apps/tuxonice-userui</c> package
-is needed. Additionally, you've got to enable the <c>fbsplash</c> USE flag.
-</p>
-
-<pre caption="Installing tuxonice-userui">
-# <i>echo "sys-apps/tuxonice-userui fbsplash" >> /etc/portage/package.use</i>
-# <i>emerge tuxonice-userui</i>
-</pre>
-
-<p>
-The ebuild tells you to make a symlink to the theme you want to use. For
-example, to use the <c>livecd-2005.1</c> theme, run the following command:
-</p>
-
-<pre caption="Using the livecd-2005.1 theme during hibernation">
-# <i>ln -sfn /etc/splash/livecd-2005.1 /etc/splash/tuxonice</i>
-</pre>
-
-<p>
-If you don't want a black screen in the first part of the resume process, you
-have to add the <c>tuxoniceui_fbsplash</c> tool to your initrd image. Assuming
-you created the initrd image with <c>splash_geninitramfs</c> and saved it as
-<path>/boot/fbsplash-emergence-1024x768</path>, here's how to do that.
-</p>
-
-<pre caption="Adding tuxoniceui_fbsplash to an initrd image">
-# <i>mount /boot</i>
-# <i>mkdir ~/initrd.d</i>
-# <i>cp /boot/fbsplash-emergence-1024x768 ~/initrd.d/</i>
-# <i>cd ~/initrd.d</i>
-# <i>gunzip -c fbsplash-emergence-1024x768 | cpio -idm --quiet -H newc</i>
-# <i>rm fbsplash-emergence-1024x768</i>
-# <i>cp /usr/sbin/tuxoniceui_fbsplash sbin/</i>
-# <i>find . | cpio --quiet --dereference -o -H newc | gzip -9 > /boot/fbsplash-tuxonice-emergence-1024x768</i>
-</pre>
-
-<p>
-Afterwards adjust <path>grub.conf</path> (or <path>lilo.conf</path>) so that
-your TuxOnIce kernel uses
-<path>/boot/fbsplash-tuxonice-emergence-1024x768</path> as initrd image. You can
-now test a dry run to see if everything is setup correctly.
-</p>
-
-<pre caption="Test run for fbsplash hibernation">
-# <i>tuxoniceui_fbsplash -t</i>
-</pre>
-
-<p>
-Afterwards open <path>/etc/hibernate/common.conf</path> and activate the
-fbsplash options. Execute <c>hibernate</c> and enjoy.
-</p>
-
-</body>
-</section>
-</chapter>
-
-<chapter>
-<title>Troubleshooting</title>
-<section>
-<body>
-
-<p>
-<e>Q:</e> I'm trying to change the CPU frequency, but
-<path>/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor</path> does not
-exist.
-</p>
-
-<p>
-<e>A:</e> Make sure your processor supports CPU frequency scaling and you chose
-the right CPUFreq driver for your processor. Here is a list of processors that
-are supported by cpufreq (kernel 2.6.7): ARM Integrator, ARM-SA1100, ARM-SA1110,
-AMD Elan - SC400, SC410, AMD mobile K6-2+, AMD mobile K6-3+, AMD mobile Duron,
-AMD mobile Athlon, AMD Opteron, AMD Athlon 64, Cyrix Media GXm, Intel mobile
-PIII and Intel mobile PIII-M on certain chipsets, Intel Pentium 4, Intel Xeon,
-Intel Pentium M (Centrino), National Semiconductors Geode GX, Transmeta Crusoe,
-VIA Cyrix 3 / C3, UltraSPARC-III, SuperH SH-3, SH-4, several "PowerBook" and
-"iBook2" and various processors on some ACPI 2.0-compatible systems (only if
-"ACPI Processor Performance States" are available to the ACPI/BIOS interface).
-</p>
-
-<p>
-<e>Q:</e> My laptop supports frequency scaling, but
-<path>/sys/devices/system/cpu/cpu0/cpufreq/</path> is empty.
-</p>
-
-<p>
-<e>A:</e> Look for ACPI related error messages with <c>dmesg | grep ACPI</c>.
-Try to update the BIOS, especially if a broken DSDT is reported. You can also
-try to fix it yourself (which is beyond the scope of this guide).
-</p>
-
-<p>
-<e>Q:</e> My laptop supports frequency scaling, but according to
-<path>/proc/cpuinfo</path> the speed never changes.
-</p>
-
-<p>
-<e>A:</e> Probably you have activated symmetric multiprocessing support
-(CONFIG_SMP) in your kernel. Deactivate it and it should work. Some older
-kernels had a bug causing this. In that case, run <c>emerge x86info</c>, update
-your kernel as asked and check the current frequency with <c>x86info -mhz</c>.
-</p>
-
-<p>
-<e>Q:</e> I can change the CPU frequency, but the range is not as wide as in
-another OS.
-</p>
-
-<p>
-<e>A:</e> You can combine frequency scaling with ACPI throttling to get a lower
-minimum frequency. Notice that throttling doesn't save much energy and is mainly
-used for thermal management (keeping your laptop cool and quiet). You can read
-the current throttling state with <c>cat /proc/acpi/processor/CPU/throttling</c>
-and change it with <c>echo -n "0:x" > /proc/acpi/processor/CPU/limit</c>, where
-x is one of the Tx states listed in
-<path>/proc/acpi/processor/CPU/throttling</path>.
-</p>
-
-<p>
-<e>Q:</e> When configuring the kernel, powersave, performance and userspace
-governors show up, but that ondemand thing is missing. Where do I get it?
-</p>
-
-<p>
-<e>A:</e> The ondemand governor is only included in recent kernel sources. Try
-updating them.
-</p>
-
-<p>
-<e>Q:</e> Battery life time seems to be worse than before.
-</p>
-
-<p>
-<e>A:</e> Check your BIOS settings. Maybe you forgot to re-enable some of the
-settings.
-</p>
-
-<p>
-<e>Q:</e> My battery is charged, but KDE reports there would be 0% left and
-immediately shuts down.
-</p>
-
-<p>
-<e>A:</e> Check that battery support is compiled into your kernel. If you use
-it as a module, make sure the module is loaded.
-</p>
-
-<p>
-<e>Q:</e> My system logger reports things like "logger: ACPI group battery /
-action battery is not defined".
-</p>
-
-<p>
-<e>A:</e> This message is generated by the <path>/etc/acpi/default.sh</path>
-script that is shipped with acpid. You can safely ignore it. If you like to get
-rid of it, you can comment the appropriate line in
-<path>/etc/acpi/default.sh</path> as shown below:
-</p>
-
-<pre caption="Disabling warnings about unknown acpi events">
- *) # logger "ACPI action $action is not defined"
-</pre>
-
-<p>
-<e>Q:</e> I have a Dell Inspiron 51XX and I don't get any ACPI events.
-</p>
-
-<p>
-<e>A:</e> This seems to be a kernel bug. Read on <uri
-link="http://bugme.osdl.org/show_bug.cgi?id=1752">here</uri>.
-</p>
-
-<p>
-<e>Q:</e> I activated the <c>DynamicClocks</c> option in <path>xorg.conf</path>
-and now X.org crashes / the screen stays black / my laptop doesn't shutdown
-properly.
-</p>
-
-<p>
-<e>A:</e> This happens on some systems. You have to disable
-<c>DynamicClocks</c>.
-</p>
-
-<p>
-<e>Q:</e> I want to use TuxOnIce, but it tells me my swap partition is too
-small. Resizing is not an option.
-</p>
-
-<p>
-<e>A:</e> If there is enough free space on your system, you can use the
-filewriter instead of the swapwriter. The <c>hibernate-script</c> supports it as
-well. More information can be found in
-<path>/usr/src/linux/Documentation/power/tuxonice.txt</path>.
-</p>
-
-<p>
-<e>Q:</e> I just bought a brand new battery, but it only lasts for some
-minutes! What am I doing wrong?
-</p>
-
-<p>
-<e>A:</e> First follow your manufacturer's advice on how to charge the battery
-correctly.
-</p>
-
-<p>
-<e>Q:</e> The above didn't help. What should I do then?
-</p>
-
-<p>
-<e>A:</e> Some batteries sold as "new" are in fact old ones. Try the following:
-</p>
-
-<pre caption="Querying battery state">
-$ <i>grep capacity /proc/acpi/battery/BAT0/info</i>
-design capacity: 47520 mWh
-last full capacity: 41830 mWh
-</pre>
-
-<p>
-If the "last full capacity" differs significantly from the design capacity,
-your battery is probably broken. Try to claim your warranty.
-</p>
-
-<p>
-<e>Q:</e> My problem is not listed above. Where should I go next?
-</p>
-
-<p>
-<e>A:</e> Don't fear to contact me, <mail link="earthwings@gentoo.org">Dennis
-Nienhüser</mail>, directly. The <uri link="http://forums.gentoo.org">Gentoo
-Forums</uri> are a good place to get help as well. If you prefer IRC, try the
-<c>#gentoo-laptop</c> <uri link="irc://irc.gentoo.org">channel</uri>.
-</p>
-
</body>
</section>
</chapter>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2011-09-30 15:07 Camille Huot (cam)
0 siblings, 0 replies; 14+ messages in thread
From: Camille Huot (cam) @ 2011-09-30 15:07 UTC (permalink / raw
To: gentoo-doc-cvs
cam 11/09/30 15:07:46
Modified: power-management-guide.xml
Log:
typo fixed (Chema Alonso)
Revision Changes Path
1.50 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.50&view=markup
plain: http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.50&content-type=text/plain
diff : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.49&r2=1.50
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.49
retrieving revision 1.50
diff -u -r1.49 -r1.50
--- power-management-guide.xml 23 Sep 2011 18:41:52 -0000 1.49
+++ power-management-guide.xml 30 Sep 2011 15:07:46 -0000 1.50
@@ -1,6 +1,6 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.49 2011/09/23 18:41:52 swift Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.50 2011/09/30 15:07:46 cam Exp $ -->
<guide>
<title>Power Management Guide</title>
@@ -494,7 +494,7 @@
<ti>apm</ti>
<ti>
Enable support for APM, allowing <c>cpufreqd</c> to be notified about
- specific events as wel as govern power through the APM interface
+ specific events as well as govern power through the APM interface
</ti>
<ti>your laptop is very old</ti>
</tr>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2013-01-14 6:19 Joshua Saddler (nightmorph)
0 siblings, 0 replies; 14+ messages in thread
From: Joshua Saddler (nightmorph) @ 2013-01-14 6:19 UTC (permalink / raw
To: gentoo-doc-cvs
nightmorph 13/01/14 06:19:27
Modified: power-management-guide.xml
Log:
fix rc command, via email to www@g.o address
Revision Changes Path
1.52 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.52&view=markup
plain: http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.52&content-type=text/plain
diff : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.51&r2=1.52
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.51
retrieving revision 1.52
diff -u -r1.51 -r1.52
--- power-management-guide.xml 28 Mar 2012 23:20:12 -0000 1.51
+++ power-management-guide.xml 14 Jan 2013 06:19:27 -0000 1.52
@@ -1,6 +1,6 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.51 2012/03/28 23:20:12 nightmorph Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.52 2013/01/14 06:19:27 nightmorph Exp $ -->
<guide>
<title>Power Management Guide</title>
@@ -21,8 +21,8 @@
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
<license/>
-<version>6</version>
-<date>2012-03-28</date>
+<version>7</version>
+<date>2013-01-13</date>
<chapter>
<title>Introduction</title>
@@ -635,7 +635,7 @@
</p>
<pre caption="Starting cpufreqd">
-# <i>rc-service add cpufreqd default</i>
+# <i>rc-update add cpufreqd default</i>
# <i>/etc/init.d/cpufreqd start</i>
</pre>
^ permalink raw reply [flat|nested] 14+ messages in thread
* [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml
@ 2013-04-07 13:25 Sven Vermeulen (swift)
0 siblings, 0 replies; 14+ messages in thread
From: Sven Vermeulen (swift) @ 2013-04-07 13:25 UTC (permalink / raw
To: gentoo-doc-cvs
swift 13/04/07 13:25:29
Modified: power-management-guide.xml
Log:
Update wording in powermanagement guide, makes sentences a bit more readable. Thanks to Jose Fournier for suggesting this
Revision Changes Path
1.53 xml/htdocs/doc/en/power-management-guide.xml
file : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.53&view=markup
plain: http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?rev=1.53&content-type=text/plain
diff : http://sources.gentoo.org/viewvc.cgi/gentoo/xml/htdocs/doc/en/power-management-guide.xml?r1=1.52&r2=1.53
Index: power-management-guide.xml
===================================================================
RCS file: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v
retrieving revision 1.52
retrieving revision 1.53
diff -u -r1.52 -r1.53
--- power-management-guide.xml 14 Jan 2013 06:19:27 -0000 1.52
+++ power-management-guide.xml 7 Apr 2013 13:25:29 -0000 1.53
@@ -1,6 +1,6 @@
<?xml version='1.0' encoding="UTF-8"?>
<!DOCTYPE guide SYSTEM "/dtd/guide.dtd">
-<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.52 2013/01/14 06:19:27 nightmorph Exp $ -->
+<!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/power-management-guide.xml,v 1.53 2013/04/07 13:25:29 swift Exp $ -->
<guide>
<title>Power Management Guide</title>
@@ -21,8 +21,8 @@
<!-- See http://creativecommons.org/licenses/by-sa/2.5 -->
<license/>
-<version>7</version>
-<date>2013-01-13</date>
+<version>8</version>
+<date>2013-04-07</date>
<chapter>
<title>Introduction</title>
@@ -321,20 +321,24 @@
<ul>
<li>
- <e>Battery</e>, in the configuration files using the <c>BATT_</c> prefix, is
- active when the system is running on battery power
+ <e>Battery</e>, which is active when the system is running on battery power;
+ the configuration files use the <c>BATT_</c> prefix for settings related to
+ this state
</li>
<li>
- <e>AC</e>, in the configuration files using the <c>AC_</c> prefix, is active
- when the system is running on AC power
+ <e>AC</e>, which is active when the system is running on AC power;
+ the configuration files use the <c>AC_</c> prefix for settings related to
+ this state
</li>
<li>
- <e>Laptop Mode</e>, in the configuration files using the <c>LM_</c> prefix,
- is active when <e>laptop mode</e> is enabled
+ <e>Laptop Mode</e>, which is active when <e>laptop mode</e> is enabled;
+ the configuration files use the <c>LM_</c> prefix for settings related to
+ this state
</li>
<li>
- <e>No Laptop Mode</e>, in the configuration files using the <c>NOLM_</c>
- prefix, is active when <e>laptop mode</e> is disabled
+ <e>No Laptop Mode</e>, which is active when <e>laptop mode</e> is disabled;
+ the configuration files use the <c>NOLM_</c> prefix for settings related to
+ this state
</li>
</ul>
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2013-04-07 13:25 [gentoo-doc-cvs] gentoo commit in xml/htdocs/doc/en: power-management-guide.xml Sven Vermeulen (swift)
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2013-01-14 6:19 Joshua Saddler (nightmorph)
2011-09-30 15:07 Camille Huot (cam)
2011-09-23 18:41 Sven Vermeulen (swift)
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2011-03-28 10:26 Joshua Saddler (nightmorph)
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