[gentoo-user] New kernel and udev

[gentoo-user] New kernel and udev

[gentuxx]

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Hi all,

I went to do my routine "emerge -Duptv world" and it came back with
devfsd blocking gentoo-sources-2.6.13-r3.  I'm not sure whether I'm
using udev now or not.  I remember compiling into the kernel last time
I did a kernel compile.  Naturally, when I did the "emerge -Cpv
devfsd" it complained that I was unemerging something in the system
profile, and that it could damage my system.  So I just thought I
would check here before hurting anything.  ;-)

So, does the v2.6.13-r3 gentoo-sources use udev?  (Am I confusing this
with something else?)  How can I tell if I'm using udev now, and/or if
I will hurt anything by uninstalling it, to get the new kernel sources?

Thanks.

- --
gentux
echo "hfouvyAdpy/ofu" | perl -pe 's/(.)/chr(ord($1)-1)/ge'

gentux's gpg fingerprint ==> 34CE 2E97 40C7 EF6E EC40  9795 2D81 924A
6996 0993
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Version: GnuPG v1.4.1 (GNU/Linux)

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8H9sLDiT4Mfh+I+5SOHXIJs=
=w92s
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Re: [gentoo-user] New kernel and udev

[Rafael Alfaro]

Read this article
http://lwn.net/Articles/149479/

On 10/7/05, gentuxx <gentuxx@gmail.com> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi all,
>
> I went to do my routine "emerge -Duptv world" and it came back with
> devfsd blocking gentoo-sources-2.6.13-r3.  I'm not sure whether I'm
> using udev now or not.  I remember compiling into the kernel last time
> I did a kernel compile.  Naturally, when I did the "emerge -Cpv
> devfsd" it complained that I was unemerging something in the system
> profile, and that it could damage my system.  So I just thought I
> would check here before hurting anything.  ;-)
>
> So, does the v2.6.13-r3 gentoo-sources use udev?  (Am I confusing this
> with something else?)  How can I tell if I'm using udev now, and/or if
> I will hurt anything by uninstalling it, to get the new kernel sources?
>
> Thanks.
>
> - --
> gentux
> echo "hfouvyAdpy/ofu" | perl -pe 's/(.)/chr(ord($1)-1)/ge'
>
> gentux's gpg fingerprint ==> 34CE 2E97 40C7 EF6E EC40  9795 2D81 924A
> 6996 0993
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.1 (GNU/Linux)
>
> iD8DBQFDRd/6LYGSSmmWCZMRApEjAJ95zhCxlNCIZW1e71555qUy/8HLDgCghDdK
> 8H9sLDiT4Mfh+I+5SOHXIJs=
> =w92s
> -----END PGP SIGNATURE-----
>
> --
> gentoo-user@gentoo.org mailing list
>
>

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Re: [gentoo-user] New kernel and udev

[Rafael Alfaro]

read this udev guide too:
http://www.gentoo.org/doc/en/udev-guide.xml

On 10/7/05, gentuxx <gentuxx@gmail.com> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> Hi all,
>
> I went to do my routine "emerge -Duptv world" and it came back with
> devfsd blocking gentoo-sources-2.6.13-r3.  I'm not sure whether I'm
> using udev now or not.  I remember compiling into the kernel last time
> I did a kernel compile.  Naturally, when I did the "emerge -Cpv
> devfsd" it complained that I was unemerging something in the system
> profile, and that it could damage my system.  So I just thought I
> would check here before hurting anything.  ;-)
>
> So, does the v2.6.13-r3 gentoo-sources use udev?  (Am I confusing this
> with something else?)  How can I tell if I'm using udev now, and/or if
> I will hurt anything by uninstalling it, to get the new kernel sources?
>
> Thanks.
>
> - --
> gentux
> echo "hfouvyAdpy/ofu" | perl -pe 's/(.)/chr(ord($1)-1)/ge'
>
> gentux's gpg fingerprint ==> 34CE 2E97 40C7 EF6E EC40  9795 2D81 924A
> 6996 0993
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.1 (GNU/Linux)
>
> iD8DBQFDRd/6LYGSSmmWCZMRApEjAJ95zhCxlNCIZW1e71555qUy/8HLDgCghDdK
> 8H9sLDiT4Mfh+I+5SOHXIJs=
> =w92s
> -----END PGP SIGNATURE-----
>
> --
> gentoo-user@gentoo.org mailing list
>
>

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Re: [gentoo-user] New kernel and udev

[Richard Fish]

gentuxx wrote:

>-----BEGIN PGP SIGNED MESSAGE-----
>Hash: SHA1
>
>Hi all,
>
>I went to do my routine "emerge -Duptv world" and it came back with
>devfsd blocking gentoo-sources-2.6.13-r3.  I'm not sure whether I'm
>using udev now or not.  I remember compiling into the kernel last time
>I did a kernel compile.  Naturally, when I did the "emerge -Cpv
>devfsd" it complained that I was unemerging something in the system
>profile, and that it could damage my system.  So I just thought I
>would check here before hurting anything.  ;-)
>  
>

Take a look at the RC_DEVICES setting in /etc/conf.d/rc.  If that says 
"auto" or "udev", then you are using udev and can safely remove devfs.  
Another way to check is to look at the output of "mount | grep /dev".  
Here is what it says for me:

udev on /dev type tmpfs (rw,nosuid)

If you are still using devfs, this will probably say "type devfs".

-Richard

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Re: [gentoo-user] New kernel and udev

[gentuxx]

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Hash: SHA1

Richard Fish wrote:

>
>
> gentuxx wrote:
>
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>> Hi all,
>>
>> I went to do my routine "emerge -Duptv world" and it came back with
>> devfsd blocking gentoo-sources-2.6.13-r3. I'm not sure whether I'm
>> using udev now or not. I remember compiling into the kernel last time
>> I did a kernel compile. Naturally, when I did the "emerge -Cpv
>> devfsd" it complained that I was unemerging something in the system
>> profile, and that it could damage my system. So I just thought I
>> would check here before hurting anything. ;-)
>>
>>
>
> Take a look at the RC_DEVICES setting in /etc/conf.d/rc. If that
> says "auto" or "udev", then you are using udev and can safely remove
> devfs. Another way to check is to look at the output of "mount |
> grep /dev". Here is what it says for me:
>
> udev on /dev type tmpfs (rw,nosuid)
>
> If you are still using devfs, this will probably say "type devfs".
>
> -Richard
>
No devfs.  I guess I was thinking that udev WAS devfs.  I also found
this:  http://www.gentoo.org/doc/en/devfs-guide.xml, which was a
help.  ;-)

Thanks.

- --
gentux
echo "hfouvyAdpy/ofu" | perl -pe 's/(.)/chr(ord($1)-1)/ge'

gentux's gpg fingerprint ==> 34CE 2E97 40C7 EF6E EC40  9795 2D81 924A
6996 0993
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Version: GnuPG v1.4.1 (GNU/Linux)

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UbMw2lSMTNYZW7fCmWdo8LU=
=2zQ2
-----END PGP SIGNATURE-----

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Re: [gentoo-user] New kernel and udev

[Roy Wright]

gentuxx wrote:

>-----BEGIN PGP SIGNED MESSAGE-----
>Hash: SHA1
>
>Richard Fish wrote:
>
>  
>
>>gentuxx wrote:
>>
>>    
>>
>>>-----BEGIN PGP SIGNED MESSAGE-----
>>>Hash: SHA1
>>>
>>>Hi all,
>>>
>>>I went to do my routine "emerge -Duptv world" and it came back with
>>>devfsd blocking gentoo-sources-2.6.13-r3. I'm not sure whether I'm
>>>using udev now or not. I remember compiling into the kernel last time
>>>I did a kernel compile. Naturally, when I did the "emerge -Cpv
>>>devfsd" it complained that I was unemerging something in the system
>>>profile, and that it could damage my system. So I just thought I
>>>would check here before hurting anything. ;-)
>>>
>>>
>>>      
>>>
>>Take a look at the RC_DEVICES setting in /etc/conf.d/rc. If that
>>says "auto" or "udev", then you are using udev and can safely remove
>>devfs. Another way to check is to look at the output of "mount |
>>grep /dev". Here is what it says for me:
>>
>>udev on /dev type tmpfs (rw,nosuid)
>>
>>If you are still using devfs, this will probably say "type devfs".
>>
>>-Richard
>>
>>    
>>
>No devfs.  I guess I was thinking that udev WAS devfs.  I also found
>this:  http://www.gentoo.org/doc/en/devfs-guide.xml, which was a
>help.  ;-)
>
>Thanks.
>
>- --
>gentux
>echo "hfouvyAdpy/ofu" | perl -pe 's/(.)/chr(ord($1)-1)/ge'
>
>gentux's gpg fingerprint ==> 34CE 2E97 40C7 EF6E EC40  9795 2D81 924A
>6996 0993
>-----BEGIN PGP SIGNATURE-----
>Version: GnuPG v1.4.1 (GNU/Linux)
>
>iD8DBQFDRfGVLYGSSmmWCZMRAsZ3AKDFZXbuCAdvDoKUCqbYMpIeihGr/gCgj13N
>UbMw2lSMTNYZW7fCmWdo8LU=
>=2zQ2
>-----END PGP SIGNATURE-----
>
>  
>
Three times in the past months I've tried to get udev up and
running without luck.  With the new kernel forcing the removal
of devfs, I'm trying the fourth time.

Current kernel is 2.6.12-r10.

Removed devfs automount but left it built into the kernel
(as described in Gentoo udev Guide).

Here's my grub.conf:

# /boot/grub/grub.conf:
timeout 30
default 0
splashimage=(hd0,0)/grub/splash.xpm.gz

# For booting Linux
title  Gentoo Latest
root (hd0,0)
kernel (hd0,0)/boot/vmlinuz root=/dev/sda3

# For booting Linux with udev
title Gentoo Latest with udev
root (hd0,0)
kernel (hd0,0)/boot/vmlinuz root=/dev/sda3 udev gentoo=nodevfs

# abridged other boot items...


I believe (according to the Gentoo udev Guide) that "Gentoo Latest"
ought to boot with udev.  It doesn't.  Instead it boots with devfs.
Note, both udevd and devfsd are running:

royw-gentoo tmp # ps -e | grep udev
  949 ?        00:00:00 udevd
royw-gentoo tmp # ps -e | grep devfs
 1127 ?        00:00:00 devfsd


The second item, "Gentoo Latest with udev", tries to force udev.
What happens is the kernel can't find either udev or devfs, gives
a 15 second warning, then continues to boot with nothing mounted
on /dev.

Here's my rc config file:

# /etc/conf.d/rc: Global config file for the Gentoo RC System
RC_TTY_NUMBER=11
RC_PARALLEL_STARTUP="no"
RC_NET_STRICT_CHECKING="no"
RC_VOLUME_ORDER="raid evms lvm dm"
RC_USE_FSTAB="no"
RC_USE_CONFIG_PROFILE="yes"
RC_FORCE_AUTO="no"
RC_DEVICES="auto"
RC_DEVICE_TARBALL="no"
RC_RETRY_KILL="yes"
RC_RETRY_TIMEOUT=1
RC_RETRY_COUNT=5
RC_FAIL_ON_ZOMBIE="no"
svcdir="/var/lib/init.d"
svcmount="no"
svcfstype="tmpfs"
svcsize=2048


Not sure if any other config files are used.

Any ideas?

TIA,
Roy
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Re: [gentoo-user] New kernel and udev

[brettholcomb]

udev is now default.  If you've built your kernel with udev and emerged udev then you should be able to uninstall devfs.  I did - but I've been running udev for a long time now.  There is a doc on Gentoo about how to move to udev so make sure you've done that first.


> 
> From: gentuxx <gentuxx@gmail.com>
> Date: 2005/10/06 Thu PM 10:39:55 EDT
> To: gentoo-user@lists.gentoo.org
> Subject: [gentoo-user] New kernel and udev
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Hi all,
> 
> I went to do my routine "emerge -Duptv world" and it came back with
> devfsd blocking gentoo-sources-2.6.13-r3.  I'm not sure whether I'm
> using udev now or not.  I remember compiling into the kernel last time
> I did a kernel compile.  Naturally, when I did the "emerge -Cpv
> devfsd" it complained that I was unemerging something in the system
> profile, and that it could damage my system.  So I just thought I
> would check here before hurting anything.  ;-)
> 
> So, does the v2.6.13-r3 gentoo-sources use udev?  (Am I confusing this
> with something else?)  How can I tell if I'm using udev now, and/or if
> I will hurt anything by uninstalling it, to get the new kernel sources?
> 
> Thanks.
> 
> - --
> gentux
> echo "hfouvyAdpy/ofu" | perl -pe 's/(.)/chr(ord($1)-1)/ge'
> 
> gentux's gpg fingerprint ==> 34CE 2E97 40C7 EF6E EC40  9795 2D81 924A
> 6996 0993
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.4.1 (GNU/Linux)
> 
> iD8DBQFDRd/6LYGSSmmWCZMRApEjAJ95zhCxlNCIZW1e71555qUy/8HLDgCghDdK
> 8H9sLDiT4Mfh+I+5SOHXIJs=
> =w92s
> -----END PGP SIGNATURE-----
> 
> -- 
> gentoo-user@gentoo.org mailing list
> 
> 

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Re: [gentoo-user] New kernel and udev

[Richard Fish]

Roy Wright wrote:

> # For booting Linux with udev
> title Gentoo Latest with udev
> root (hd0,0)
> kernel (hd0,0)/boot/vmlinuz root=/dev/sda3 udev gentoo=nodevfs


Change to:
kernel (hd0,0)/boot/vmlinuz root=/dev/sda3


>
> I believe (according to the Gentoo udev Guide) that "Gentoo Latest"
> ought to boot with udev.  It doesn't.  Instead it boots with devfs.
> Note, both udevd and devfsd are running:


Looking through /sbin/rc, gentoo will disable udev if any of the 
following are true:

1. RC_DEVICES is set to "devfs".
2. The kernel command line contains "noudev".
3. The kernel version is less than 2.6.0.
4. /sbin/udev does not exist or is not an executable file
5. The file /dev/.devfsd exists.

Since the first 3 definitely do not apply, and you seem to have emerged 
udev, my guess is you probably need to remove /dev/.devfsd to enable udev.

-Richard

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Re: [gentoo-user] New kernel and udev

[Roy Wright]

Richard Fish wrote:

>
> Looking through /sbin/rc, gentoo will disable udev if any of the 
> following are true:
>
> 1. RC_DEVICES is set to "devfs".
> 2. The kernel command line contains "noudev".
> 3. The kernel version is less than 2.6.0.
> 4. /sbin/udev does not exist or is not an executable file
> 5. The file /dev/.devfsd exists.
>
> Since the first 3 definitely do not apply, and you seem to have 
> emerged udev, my guess is you probably need to remove /dev/.devfsd to 
> enable udev.
>
> -Richard
>
THANK YOU!!!!

#5 was the problem.  Could not remove it with devfs in use, so booted to 
the mode where
neither devfs nor udev were used, then deleted it.

The only other issue so for was X wouldn't start.  Xorg.0.log showed 
/dev/mouse not
found.  Had to "ln -s /dev/input/mice /dev/mouse" and presto.

Onward to 2.6.13...

Again,
Thank you!

-Roy
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