[gentoo-user] Shutdown, Gentoo and the Arietta.G25

[gentoo-user] Shutdown, Gentoo and the Arietta.G25

[meino.cramer]

Hi,

another >sigh< from an Arietta adventure...

I sintalled Gentoo on an Arietta G25
(http://www.acmesystems.it/arietta).

For this I used Robert Nelsons Kernel for armv5tel platforms,
which boots fine (using at91bootstrap, no U-Boot). 

But: Shutdown (as recommmended by acmesystems "shutdown -h -H now")
REBOOTS the system instead of powering it down.

The hardware is not to blame: Using the original Debian rootfs
and the kernel 3.16.1 (Robert Nelsons kernel is 3.17.3.) the
powerdown works fine.

Firstly I blamed the kernel...but when using the 3.16.1 kernel
and the Gentoo rootfs the problem remains.

Then I copied the Gentoo shutdown to the Debian rootfs, boot that
and tries to shutdown the Debian Linux with it.
shutdown cries "no /dev/initctl" adn shutdowns the system only for
rebooting it.

Ok...seems to be the shutdown executable.

I copied the Debian shutdown to Gentoo and tries that:
The systems reboots.

Slowly but surely I begin to think, that I dont understand anything at all of
It would be relly good news, 
that...

"man shutdown" on the Debian image informs me, that the manpages
were not installed (embedded system...). Shutdown --version gives
a short help of the usual options...but nothing more.

What is the difference here? 
Isn't it, that all shutdown applications only send some instructions
to the kernel and the kernel is the main actor in bringing the system
down?

Is there any shutdown guru ;) out there, who is able to shed some
light into this problem ? :)

Thank you very much in advance for any torch send into my direction!
Best regards,
Meino

[gentoo-user] Re: Shutdown, Gentoo and the Arietta.G25

[James]

 <meino.cramer <at> gmx.de> writes:


> But: Shutdown (as recommmended by acmesystems "shutdown -h -H now")
> REBOOTS the system instead of powering it down.

What about "halt"?   man halt

> What is the difference here? 
> Isn't it, that all shutdown applications only send some instructions
> to the kernel and the kernel is the main actor in bringing the system
> down?

> Meino


Meino, "it's an embedded system". That can mean unique hardware, via
the SoC, hidden codes via the in-situ firmware, or a myriad of things
hidden in the "recommended" kernel(s).  Many embedded developers
forked off their own "embedded kernel" form linux via the 2.2 or 2.4
kernel series.

So, you have to "fully characterize" the system. Which is difficult to
impossible, as the vendor wants to retain control in most circumstances.
The good news is most "hardware vendors" are dumb, when it comes to codes;
so there is most always a work-around; hence "man halt" as for your
next leg of the journey?

hth,
James

Re: [gentoo-user] Shutdown, Gentoo and the Arietta.G25

[Rich Freeman]

On Mon, Dec 1, 2014 at 12:46 PM,  <meino.cramer@gmx.de> wrote:
> What is the difference here?
> Isn't it, that all shutdown applications only send some instructions
> to the kernel and the kernel is the main actor in bringing the system
> down?
>

About the only thing the kernel might have a role in is turning off
the power.  Almost all of the shutdown logic is in userspace and it
isn't surprising that copying scripts between distros is going to
cause issues since the whole service management component varies
GREATLY across distros.  Maybe if you're using systemd you could copy
between distros since that is more standardized, but even then there
can be differences.

In a traditional sysvinit system usually shutting down is accomplished
by changing runlevels, which immediately starts/stops anything in
inittab (generally only gettys) and calls a script which does all the
actual work.

If the issue is that userspace shuts down fine but the system reboots
instead of powering off that could be a couple of things which
shouldn't be too hard to track down.  An obvious question is whether
the hardware even supports being powered off in the first place - this
isn't an ATX motherboard.  Powering off a system can sometimes be
remarkably tricky depending on how standardized the platform is.  I
was reading an article on it a few years ago and I think linux
actually implements several different mechanisms that get tried in
series, with the final fallback being a halt without powering off.

--
Rich

Re: [gentoo-user] Shutdown, Gentoo and the Arietta.G25

[Dale]

meino.cramer@gmx.de wrote:
> Hi,
>
> another >sigh< from an Arietta adventure...
>
> I sintalled Gentoo on an Arietta G25
> (http://www.acmesystems.it/arietta).
>
> For this I used Robert Nelsons Kernel for armv5tel platforms,
> which boots fine (using at91bootstrap, no U-Boot). 
>
> But: Shutdown (as recommmended by acmesystems "shutdown -h -H now")
> REBOOTS the system instead of powering it down.
>
> The hardware is not to blame: Using the original Debian rootfs
> and the kernel 3.16.1 (Robert Nelsons kernel is 3.17.3.) the
> powerdown works fine.
>
> Firstly I blamed the kernel...but when using the 3.16.1 kernel
> and the Gentoo rootfs the problem remains.
>
> Then I copied the Gentoo shutdown to the Debian rootfs, boot that
> and tries to shutdown the Debian Linux with it.
> shutdown cries "no /dev/initctl" adn shutdowns the system only for
> rebooting it.
>
> Ok...seems to be the shutdown executable.
>
> I copied the Debian shutdown to Gentoo and tries that:
> The systems reboots.
>
> Slowly but surely I begin to think, that I dont understand anything at all of
> It would be relly good news, 
> that...
>
> "man shutdown" on the Debian image informs me, that the manpages
> were not installed (embedded system...). Shutdown --version gives
> a short help of the usual options...but nothing more.
>
> What is the difference here? 
> Isn't it, that all shutdown applications only send some instructions
> to the kernel and the kernel is the main actor in bringing the system
> down?
>
> Is there any shutdown guru ;) out there, who is able to shed some
> light into this problem ? :)
>
> Thank you very much in advance for any torch send into my direction!
> Best regards,
> Meino
>

Just shooting in the dark here, try -h and -H but not at the same time? 
Maybe having both is clashing in some weird way???

Dale

:-)  :-) 

Re: [gentoo-user] Re: Shutdown, Gentoo and the Arietta.G25

[meino.cramer]

James <wireless@tampabay.rr.com> [14-12-01 19:12]:
>  <meino.cramer <at> gmx.de> writes:
> 
> 
> > But: Shutdown (as recommmended by acmesystems "shutdown -h -H now")
> > REBOOTS the system instead of powering it down.
> 
> What about "halt"?   man halt
> 
> > What is the difference here? 
> > Isn't it, that all shutdown applications only send some instructions
> > to the kernel and the kernel is the main actor in bringing the system
> > down?
> 
> > Meino
> 
> 
> Meino, "it's an embedded system". That can mean unique hardware, via
> the SoC, hidden codes via the in-situ firmware, or a myriad of things
> hidden in the "recommended" kernel(s).  Many embedded developers
> forked off their own "embedded kernel" form linux via the 2.2 or 2.4
> kernel series.
> 
> So, you have to "fully characterize" the system. Which is difficult to
> impossible, as the vendor wants to retain control in most circumstances.
> The good news is most "hardware vendors" are dumb, when it comes to codes;
> so there is most always a work-around; hence "man halt" as for your
> next leg of the journey?
> 
> hth,
> James
> 

Hi James,

:)

The complete software is open source. The patches from acmesystems to (or is
"against" the better english word for that process???) the
kernel are only adding dts/dtb files (device
tree...kinda "config file to tell the kernel at what adress what
hardware is, what size the memory/flash is etcetera"...human readable)
and prepare an already done kernel configuration. There is no "hiding"
by acmesystems. No propietary firmware blob (ok...there is one...but it is for
the additional Ralink Wifi chip and is offered inside a Linux.firmware.tar.gz
indepandantly from acmesystems.)

The hardware itself consists of an AT91SAM9G25 CPU by Atmel and 256 MB
of RAM (and some analog power thingies and regulators) and a Mico-USB
socket. And lots of GPIO connectors. The hardware is such a "Middle of
the road" that Robert Nelsons said, that even a complete mainline
kernel just directly taken from Linus desktop would work.

The problem with shutdown was mentioned in their "Trouble shooting
FAQ" and it was said, that instead of "halt" one should use "shutdown
-h -H now"...which works with a Debian system...but not with Gentoo.

They describe how to compile the kernel thet use...:
Fetch the 3.16.1 kernel from ftp.kernel.org
Apply the patch
Compile the kernel and the modules
Install it on the SDcard.
Add a rootfs
Done.
No hiding or propietary stuff.
Just open source.

The problem I think is burried under the differences of both rootfs:
Debian and Gentoo

Best regards,
Meino

Re: [gentoo-user] Shutdown, Gentoo and the Arietta.G25

[meino.cramer]

Dale <rdalek1967@gmail.com> [14-12-01 19:16]:
> meino.cramer@gmx.de wrote:
> > Hi,
> >
> > another >sigh< from an Arietta adventure...
> >
> > I sintalled Gentoo on an Arietta G25
> > (http://www.acmesystems.it/arietta).
> >
> > For this I used Robert Nelsons Kernel for armv5tel platforms,
> > which boots fine (using at91bootstrap, no U-Boot). 
> >
> > But: Shutdown (as recommmended by acmesystems "shutdown -h -H now")
> > REBOOTS the system instead of powering it down.
> >
> > The hardware is not to blame: Using the original Debian rootfs
> > and the kernel 3.16.1 (Robert Nelsons kernel is 3.17.3.) the
> > powerdown works fine.
> >
> > Firstly I blamed the kernel...but when using the 3.16.1 kernel
> > and the Gentoo rootfs the problem remains.
> >
> > Then I copied the Gentoo shutdown to the Debian rootfs, boot that
> > and tries to shutdown the Debian Linux with it.
> > shutdown cries "no /dev/initctl" adn shutdowns the system only for
> > rebooting it.
> >
> > Ok...seems to be the shutdown executable.
> >
> > I copied the Debian shutdown to Gentoo and tries that:
> > The systems reboots.
> >
> > Slowly but surely I begin to think, that I dont understand anything at all of
> > It would be relly good news, 
> > that...
> >
> > "man shutdown" on the Debian image informs me, that the manpages
> > were not installed (embedded system...). Shutdown --version gives
> > a short help of the usual options...but nothing more.
> >
> > What is the difference here? 
> > Isn't it, that all shutdown applications only send some instructions
> > to the kernel and the kernel is the main actor in bringing the system
> > down?
> >
> > Is there any shutdown guru ;) out there, who is able to shed some
> > light into this problem ? :)
> >
> > Thank you very much in advance for any torch send into my direction!
> > Best regards,
> > Meino
> >
> 
> Just shooting in the dark here, try -h and -H but not at the same time? 
> Maybe having both is clashing in some weird way???
> 
> Dale
> 
> :-)  :-) 
> 

Hi Dale,

The "Trouble shooting FAQ"*)  by acmesystems explicitely say "shutdown -h
-H now" (and it works with the Debian rootfs)...but I will try "the
other shutdowns" and will see, what happens,

Best regards,
Meino



*) http://www.acmesystems.it/qa

Re: [gentoo-user] Shutdown, Gentoo and the Arietta.G25

[meino.cramer]

Rich Freeman <rich0@gentoo.org> [14-12-01 19:16]:
> On Mon, Dec 1, 2014 at 12:46 PM,  <meino.cramer@gmx.de> wrote:
> > What is the difference here?
> > Isn't it, that all shutdown applications only send some instructions
> > to the kernel and the kernel is the main actor in bringing the system
> > down?
> >
> 
> About the only thing the kernel might have a role in is turning off
> the power.  Almost all of the shutdown logic is in userspace and it
> isn't surprising that copying scripts between distros is going to
> cause issues since the whole service management component varies
> GREATLY across distros.  Maybe if you're using systemd you could copy
> between distros since that is more standardized, but even then there
> can be differences.
> 
> In a traditional sysvinit system usually shutting down is accomplished
> by changing runlevels, which immediately starts/stops anything in
> inittab (generally only gettys) and calls a script which does all the
> actual work.
> 
> If the issue is that userspace shuts down fine but the system reboots
> instead of powering off that could be a couple of things which
> shouldn't be too hard to track down.  An obvious question is whether
> the hardware even supports being powered off in the first place - this
> isn't an ATX motherboard.  Powering off a system can sometimes be
> remarkably tricky depending on how standardized the platform is.  I
> was reading an article on it a few years ago and I think linux
> actually implements several different mechanisms that get tried in
> series, with the final fallback being a halt without powering off.
> 
> --
> Rich
> 

Hi Rich,

AH! :) Thanks for the informations! 

From what you say, it is a kernel problem, since the kernel
is the one who switches off the lights...

But even if I use the same kernel as used for the Debian system
it does not work...

May be shutdown says "power off the system" and the kernel understands
"reboot the system"?
I mean: In principle the kernel would be able to poweroff the system
but there are some communications difficulties with the guys from
userland? ;)

Best regards,
Meino

Re: [gentoo-user] Shutdown, Gentoo and the Arietta.G25

[Jc García]

2014-12-01 12:40 GMT-06:00  <meino.cramer@gmx.de>:
> Rich Freeman <rich0@gentoo.org> [14-12-01 19:16]:
>> On Mon, Dec 1, 2014 at 12:46 PM,  <meino.cramer@gmx.de> wrote:
>> > What is the difference here?
>> > Isn't it, that all shutdown applications only send some instructions
>> > to the kernel and the kernel is the main actor in bringing the system
>> > down?
>> >
>>
>> About the only thing the kernel might have a role in is turning off
>> the power.  Almost all of the shutdown logic is in userspace and it
>> isn't surprising that copying scripts between distros is going to
>> cause issues since the whole service management component varies
>> GREATLY across distros.  Maybe if you're using systemd you could copy
>> between distros since that is more standardized, but even then there
>> can be differences.
>>
>> In a traditional sysvinit system usually shutting down is accomplished
>> by changing runlevels, which immediately starts/stops anything in
>> inittab (generally only gettys) and calls a script which does all the
>> actual work.
>>
>> If the issue is that userspace shuts down fine but the system reboots
>> instead of powering off that could be a couple of things which
>> shouldn't be too hard to track down.  An obvious question is whether
>> the hardware even supports being powered off in the first place - this
>> isn't an ATX motherboard.  Powering off a system can sometimes be
>> remarkably tricky depending on how standardized the platform is.  I
>> was reading an article on it a few years ago and I think linux
>> actually implements several different mechanisms that get tried in
>> series, with the final fallback being a halt without powering off.
>>
>> --
>> Rich
>>
>
> Hi Rich,
>
> AH! :) Thanks for the informations!
>
> From what you say, it is a kernel problem, since the kernel
> is the one who switches off the lights...
>
> But even if I use the same kernel as used for the Debian system
> it does not work...
>
> May be shutdown says "power off the system" and the kernel understands
> "reboot the system"?
> I mean: In principle the kernel would be able to poweroff the system
> but there are some communications difficulties with the guys from
> userland? ;)
>
> Best regards,
> Meino
>
>
>
I've always turned off across linux distros (BSD is other story) with:

# shutdown -hP now

the help says :
 -h:      halt after shutdown.
 -P:      halt action is to turn off power.
 -H:      halt action is to just halt.

I've not seen you using the -P flag.

Re: [gentoo-user] Shutdown, Gentoo and the Arietta.G25

[meino.cramer]

Jc García <jyo.garcia@gmail.com> [14-12-01 20:36]:
> 2014-12-01 12:40 GMT-06:00  <meino.cramer@gmx.de>:
> > Rich Freeman <rich0@gentoo.org> [14-12-01 19:16]:
> >> On Mon, Dec 1, 2014 at 12:46 PM,  <meino.cramer@gmx.de> wrote:
> >> > What is the difference here?
> >> > Isn't it, that all shutdown applications only send some instructions
> >> > to the kernel and the kernel is the main actor in bringing the system
> >> > down?
> >> >
> >>
> >> About the only thing the kernel might have a role in is turning off
> >> the power.  Almost all of the shutdown logic is in userspace and it
> >> isn't surprising that copying scripts between distros is going to
> >> cause issues since the whole service management component varies
> >> GREATLY across distros.  Maybe if you're using systemd you could copy
> >> between distros since that is more standardized, but even then there
> >> can be differences.
> >>
> >> In a traditional sysvinit system usually shutting down is accomplished
> >> by changing runlevels, which immediately starts/stops anything in
> >> inittab (generally only gettys) and calls a script which does all the
> >> actual work.
> >>
> >> If the issue is that userspace shuts down fine but the system reboots
> >> instead of powering off that could be a couple of things which
> >> shouldn't be too hard to track down.  An obvious question is whether
> >> the hardware even supports being powered off in the first place - this
> >> isn't an ATX motherboard.  Powering off a system can sometimes be
> >> remarkably tricky depending on how standardized the platform is.  I
> >> was reading an article on it a few years ago and I think linux
> >> actually implements several different mechanisms that get tried in
> >> series, with the final fallback being a halt without powering off.
> >>
> >> --
> >> Rich
> >>
> >
> > Hi Rich,
> >
> > AH! :) Thanks for the informations!
> >
> > From what you say, it is a kernel problem, since the kernel
> > is the one who switches off the lights...
> >
> > But even if I use the same kernel as used for the Debian system
> > it does not work...
> >
> > May be shutdown says "power off the system" and the kernel understands
> > "reboot the system"?
> > I mean: In principle the kernel would be able to poweroff the system
> > but there are some communications difficulties with the guys from
> > userland? ;)
> >
> > Best regards,
> > Meino
> >
> >
> >
> I've always turned off across linux distros (BSD is other story) with:
> 
> # shutdown -hP now
> 
> the help says :
>  -h:      halt after shutdown.
>  -P:      halt action is to turn off power.
>  -H:      halt action is to just halt.
> 
> I've not seen you using the -P flag.
> 

That's why the manufacturer of the Arietta G25 - Acmesystems said
to use shutdown -h -H now for that purpose:
http://www.acmesystems.it/qa
Second question below the title "Arietta G25 just on top of the
page...

[gentoo-user] Re: Shutdown, Gentoo and the Arietta.G25

[James]

 <meino.cramer <at> gmx.de> writes:


> > > But: Shutdown (as recommmended by acmesystems "shutdown -h -H now")
> > > REBOOTS the system instead of powering it down.

> > What about "halt"?   man halt

> The problem I think is burried 

Okay, ferret it out.

Does this accomplish what you want:


"sync;sync;sync;halt"   ?


"man sync"

You may need to pass arguements to halt. A standard
man page may not be exactly correct in what you have,
so you may have to peruse the codes.

Think for a second. It's embedded, so why can the
board (OS) be shutdown or halted as you like?



James

Re: [gentoo-user] Shutdown, Gentoo and the Arietta.G25

[Fernando Rodriguez]

[-- Attachment #1: Type: text/plain, Size: 3214 bytes --]

On Monday, December 01, 2014 7:34:35 PM meino.cramer@gmx.de wrote:
> Dale <rdalek1967@gmail.com> [14-12-01 19:16]:
> > meino.cramer@gmx.de wrote:
> > > Hi,
> > >
> > > another >sigh< from an Arietta adventure...
> > >
> > > I sintalled Gentoo on an Arietta G25
> > > (http://www.acmesystems.it/arietta).
> > >
> > > For this I used Robert Nelsons Kernel for armv5tel platforms,
> > > which boots fine (using at91bootstrap, no U-Boot). 
> > >
> > > But: Shutdown (as recommmended by acmesystems "shutdown -h -H now")
> > > REBOOTS the system instead of powering it down.
> > >
> > > The hardware is not to blame: Using the original Debian rootfs
> > > and the kernel 3.16.1 (Robert Nelsons kernel is 3.17.3.) the
> > > powerdown works fine.
> > >
> > > Firstly I blamed the kernel...but when using the 3.16.1 kernel
> > > and the Gentoo rootfs the problem remains.
> > >
> > > Then I copied the Gentoo shutdown to the Debian rootfs, boot that
> > > and tries to shutdown the Debian Linux with it.
> > > shutdown cries "no /dev/initctl" adn shutdowns the system only for
> > > rebooting it.
> > >
> > > Ok...seems to be the shutdown executable.
> > >
> > > I copied the Debian shutdown to Gentoo and tries that:
> > > The systems reboots.
> > >
> > > Slowly but surely I begin to think, that I dont understand anything at 
all of
> > > It would be relly good news, 
> > > that...
> > >
> > > "man shutdown" on the Debian image informs me, that the manpages
> > > were not installed (embedded system...). Shutdown --version gives
> > > a short help of the usual options...but nothing more.
> > >
> > > What is the difference here? 
> > > Isn't it, that all shutdown applications only send some instructions
> > > to the kernel and the kernel is the main actor in bringing the system
> > > down?
> > >
> > > Is there any shutdown guru ;) out there, who is able to shed some
> > > light into this problem ? :)
> > >
> > > Thank you very much in advance for any torch send into my direction!
> > > Best regards,
> > > Meino
> > >
> > 
> > Just shooting in the dark here, try -h and -H but not at the same time? 
> > Maybe having both is clashing in some weird way???
> > 
> > Dale
> > 
> > :-)  :-) 
> > 
> 
> Hi Dale,
> 
> The "Trouble shooting FAQ"*)  by acmesystems explicitely say "shutdown -h
> -H now" (and it works with the Debian rootfs)...but I will try "the
> other shutdowns" and will see, what happens,
> 
> Best regards,
> Meino
> 
> 
> 
> *) http://www.acmesystems.it/qa
> 

Looking at the code for sysvinit, all shutdown  does is set some environment 
variables and switch runlevel. The actual shutdown is done by halt and it's 
done through the reboot system call with RB_POWER_OFF.

So, since you said the Gentoo system doesn't work even with Debian's kernel 
and the shutdown, then it must be that either Debian has a different halt, or 
more likely your Gentoo system calls halt with different options. So check your 
inittab on Gentoo and make sure it calls halt in the same way.

-- 
Fernando Rodriguez
frodriguez.developer@outlook.com
PGP Key: http://keys.gnupg.net/pks/lookup?op=get&search=0xF6CE157FF9525C1C

[-- Attachment #2: This is a digitally signed message part. --]
[-- Type: application/pgp-signature, Size: 819 bytes --]

Re: [gentoo-user] Shutdown, Gentoo and the Arietta.G25

[Fernando Rodriguez]

[-- Attachment #1: Type: text/plain, Size: 2873 bytes --]

On Monday, December 01, 2014 7:34:35 PM meino.cramer@gmx.de wrote:
> Dale <rdalek1967@gmail.com> [14-12-01 19:16]:
> > meino.cramer@gmx.de wrote:
> > > Hi,
> > >
> > > another >sigh< from an Arietta adventure...
> > >
> > > I sintalled Gentoo on an Arietta G25
> > > (http://www.acmesystems.it/arietta).
> > >
> > > For this I used Robert Nelsons Kernel for armv5tel platforms,
> > > which boots fine (using at91bootstrap, no U-Boot). 
> > >
> > > But: Shutdown (as recommmended by acmesystems "shutdown -h -H now")
> > > REBOOTS the system instead of powering it down.
> > >
> > > The hardware is not to blame: Using the original Debian rootfs
> > > and the kernel 3.16.1 (Robert Nelsons kernel is 3.17.3.) the
> > > powerdown works fine.
> > >
> > > Firstly I blamed the kernel...but when using the 3.16.1 kernel
> > > and the Gentoo rootfs the problem remains.
> > >
> > > Then I copied the Gentoo shutdown to the Debian rootfs, boot that
> > > and tries to shutdown the Debian Linux with it.
> > > shutdown cries "no /dev/initctl" adn shutdowns the system only for
> > > rebooting it.
> > >
> > > Ok...seems to be the shutdown executable.
> > >
> > > I copied the Debian shutdown to Gentoo and tries that:
> > > The systems reboots.
> > >
> > > Slowly but surely I begin to think, that I dont understand anything at 
all of
> > > It would be relly good news, 
> > > that...
> > >
> > > "man shutdown" on the Debian image informs me, that the manpages
> > > were not installed (embedded system...). Shutdown --version gives
> > > a short help of the usual options...but nothing more.
> > >
> > > What is the difference here? 
> > > Isn't it, that all shutdown applications only send some instructions
> > > to the kernel and the kernel is the main actor in bringing the system
> > > down?
> > >
> > > Is there any shutdown guru ;) out there, who is able to shed some
> > > light into this problem ? :)
> > >
> > > Thank you very much in advance for any torch send into my direction!
> > > Best regards,
> > > Meino
> > >
> > 
> > Just shooting in the dark here, try -h and -H but not at the same time? 
> > Maybe having both is clashing in some weird way???
> > 
> > Dale
> > 
> > :-)  :-) 
> > 
> 
> Hi Dale,
> 
> The "Trouble shooting FAQ"*)  by acmesystems explicitely say "shutdown -h
> -H now" (and it works with the Debian rootfs)...but I will try "the
> other shutdowns" and will see, what happens,
> 
> Best regards,
> Meino
> 
> 
> 
> *) http://www.acmesystems.it/qa
> 

Also AFAICT the -H option just set an env variable INIT_HALT and it looks like 
OpenRC ignores it so look at your init scripts on Debian and see what it does 
when it is set.

-- 
Fernando Rodriguez
frodriguez.developer@outlook.com
PGP Key: http://keys.gnupg.net/pks/lookup?op=get&search=0xF6CE157FF9525C1C

[-- Attachment #2: This is a digitally signed message part. --]
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Re: [gentoo-user] Shutdown, Gentoo and the Arietta.G25

[Rich Freeman]

On Mon, Dec 1, 2014 at 2:51 PM,  <meino.cramer@gmx.de> wrote:
> Jc García <jyo.garcia@gmail.com> [14-12-01 20:36]:
>>
>> I've not seen you using the -P flag.
>>
>
> That's why the manufacturer of the Arietta G25 - Acmesystems said
> to use shutdown -h -H now for that purpose:
> http://www.acmesystems.it/qa
> Second question below the title "Arietta G25 just on top of the
> page...
>
>

Have you just tried using -P to make sure that it doesn't work?  The
instructions also say to use Debian, not Gentoo.  Since most of the
shutdown behavior is in userspace and using components that vary
significantly between distros, I wouldn't blindly follow the
instructions written for one distro and expect it to just work with a
different distro.

Maybe Debian has some bug that makes -P not work, but -H does work.
Maybe OpenRC doesn't have that bug.

--
Rich

Re: [gentoo-user] Shutdown, Gentoo and the Arietta.G25

[Matti Nykyri]

> On Dec 1, 2014, at 23:03, Fernando Rodriguez <frodriguez.developer@outlook.com> wrote:
> 
>> On Monday, December 01, 2014 7:34:35 PM meino.cramer@gmx.de wrote:
>> Dale <rdalek1967@gmail.com> [14-12-01 19:16]:
>>> meino.cramer@gmx.de wrote:
>>>> Hi,
>>>> 
>>>> another >sigh< from an Arietta adventure...
>>>> 
>>>> I sintalled Gentoo on an Arietta G25
>>>> (http://www.acmesystems.it/arietta).
>>>> 
>>>> For this I used Robert Nelsons Kernel for armv5tel platforms,
>>>> which boots fine (using at91bootstrap, no U-Boot). 
>>>> 
>>>> But: Shutdown (as recommmended by acmesystems "shutdown -h -H now")
>>>> REBOOTS the system instead of powering it down.
>>>> 
>>>> The hardware is not to blame: Using the original Debian rootfs
>>>> and the kernel 3.16.1 (Robert Nelsons kernel is 3.17.3.) the
>>>> powerdown works fine.
>>>> 
>>>> Firstly I blamed the kernel...but when using the 3.16.1 kernel
>>>> and the Gentoo rootfs the problem remains.
>>>> 
>>>> Then I copied the Gentoo shutdown to the Debian rootfs, boot that
>>>> and tries to shutdown the Debian Linux with it.
>>>> shutdown cries "no /dev/initctl" adn shutdowns the system only for
>>>> rebooting it.
>>>> 
>>>> Ok...seems to be the shutdown executable.
>>>> 
>>>> I copied the Debian shutdown to Gentoo and tries that:
>>>> The systems reboots.
>>>> 
>>>> Slowly but surely I begin to think, that I dont understand anything at
> all of
>>>> It would be relly good news, 
>>>> that...
>>>> 
>>>> "man shutdown" on the Debian image informs me, that the manpages
>>>> were not installed (embedded system...). Shutdown --version gives
>>>> a short help of the usual options...but nothing more.
>>>> 
>>>> What is the difference here? 
>>>> Isn't it, that all shutdown applications only send some instructions
>>>> to the kernel and the kernel is the main actor in bringing the system
>>>> down?
>>>> 
>>>> Is there any shutdown guru ;) out there, who is able to shed some
>>>> light into this problem ? :)
>>>> 
>>>> Thank you very much in advance for any torch send into my direction!
>>>> Best regards,
>>>> Meino
>>> 
>>> Just shooting in the dark here, try -h and -H but not at the same time? 
>>> Maybe having both is clashing in some weird way???
>>> 
>>> Dale
>>> 
>>> :-)  :-)
>> 
>> Hi Dale,
>> 
>> The "Trouble shooting FAQ"*)  by acmesystems explicitely say "shutdown -h
>> -H now" (and it works with the Debian rootfs)...but I will try "the
>> other shutdowns" and will see, what happens,
>> 
>> Best regards,
>> Meino
>> 
>> 
>> 
>> *) http://www.acmesystems.it/qa
> 
> Looking at the code for sysvinit, all shutdown  does is set some environment 
> variables and switch runlevel. The actual shutdown is done by halt and it's 
> done through the reboot system call with RB_POWER_OFF.
> 
> So, since you said the Gentoo system doesn't work even with Debian's kernel 
> and the shutdown, then it must be that either Debian has a different halt, or 
> more likely your Gentoo system calls halt with different options. So check your 
> inittab on Gentoo and make sure it calls halt in the same way.

Hi meino

The thing is as Fernando pointed out:

Kernel powers off the hardware and a system call is used to instruct kernel to do so.


Test your system. Perform a system call to shutdown the board. As you perform this system call the arietta will instantly eighter boot or shutdown. See system call man page to see the list of available system calls. This way you can make sure the system works as expected...

When you have found the right system call, then you need to make init call that system call as the last command in run level 0.

-- 
-Matti

Re: [gentoo-user] Re: Shutdown, Gentoo and the Arietta.G25

[Joerg Schilling]

James <wireless@tampabay.rr.com> wrote:

>  <meino.cramer <at> gmx.de> writes:
>
>
> > > > But: Shutdown (as recommmended by acmesystems "shutdown -h -H now")
> > > > REBOOTS the system instead of powering it down.
>
> > > What about "halt"?   man halt
>
> > The problem I think is burried 
>
> Okay, ferret it out.
>
> Does this accomplish what you want:
>
>
> "sync;sync;sync;halt"   ?

Do you believe that a method described for early AT&T UNIX (early to mid 1970s)
where "halt" did not yet exist is a valid idea for Linux?

Jörg

-- 
 EMail:joerg@schily.net                    (home) Jörg Schilling D-13353 Berlin
       joerg.schilling@fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/
 URL:  http://cdrecord.org/private/ http://sourceforge.net/projects/schilytools/files/'

[gentoo-user] Re: Shutdown, Gentoo and the Arietta.G25

[James]

Joerg Schilling <Joerg.Schilling <at> fokus.fraunhofer.de> writes:


> > Does this accomplish what you want:

> > "sync;sync;sync;halt"   ?
> 
> Do you believe that a method described for early AT&T UNIX (early to mid  
> > 1970s) where "halt" did not yet exist is a valid idea for Linux?

valid has no value here. Meino is trying to get his embedded (hack job)
to shutdown. He first needs to get this accomplished before
finding/developing a robust solution for his unique embedded needs.
This is how most embedded workflows propagte, often with a singular dev.
Meino is very lucky, he has the gentoo community to toss him ideas
on a regular basis.


So no, not part of regular system administraion. YES for a transient
solution to an embedded hack.

hth,
James

Re: [gentoo-user] Re: Shutdown, Gentoo and the Arietta.G25

[Rich Freeman]

On Tue, Dec 2, 2014 at 1:11 PM, James <wireless@tampabay.rr.com> wrote:
>
> So no, not part of regular system administraion. YES for a transient
> solution to an embedded hack.
>

No argument that when you're troubleshooting powering off just getting
the thing to power off by any means necessary is a useful exercise.

However, I still think he should just do what the man page says (and
not what some Debian-oriented webpage says) and call shutdown with the
correct arguments to power the thing off before spending a lot of time
troubleshooting.

--
Rich

Re: [gentoo-user] Re: Shutdown, Gentoo and the Arietta.G25

[meino.cramer]

Hi all,

thank you very much for all the help you offered! :)

It works now!

Robert Nelson, who maintains the kernel for the Beagleboard Black
gave me the hint to try the kernel version 3.18.rc7 (mainline),
which receives a lot of upgrades concerning AT91 systems, which the 
Arietta G25 is one of.

Additonally from the Acmesystems mailing list I got the hint to
explicetly set the clock frequencies of the XTALs in the dts file.

After mixing everything together, recompiling the kernel and
installing it on the board I now have a Gentoo system with the
correct time (which was way off after a short period with previous
kernel versions) and 'shutdown -h -H now' now correctly powers
down the board.

I am happy!

:)

Best regards,
Meino

[gentoo-user] Re: Shutdown, Gentoo and the Arietta.G25

[James]

 <meino.cramer <at> gmx.de> writes:


-> It works now! --> I am happy!  ---> Meino


Fantastic! So now you are famous !

Now organize what you have learned and done and submit it to 
the gentoo embedded project, so they can include those critical
details into the gentoo-embedded handbook under the "boards" section:

https://www.gentoo.org/proj/en/base/embedded/handbook/

There is a section on "Contributing" send some email to
gentoo-embedded@lists.gentoo.org also.


http://www.gentoo.org/proj/en/base/embedded/

And the next time somebody needs an inexpensive embedded board,
we can point them to your work.



James