linux-kernel - Re: Sleep problems with kernels >= 2.6.21 on powerpc

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Date:	Mon, 27 Aug 2007 01:21:56 +0200
From:	"Michal Piotrowski" <michal.k.k.piotrowski@...il.com>
To:	"Rogério Brito" <rbrito@...il.com>
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	debian-powerpc@...ts.debian.org,
	"Rogério Brito" <rbrito@....usp.br>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Linux-pm mailing list" <linux-pm@...ts.linux-foundation.org>
Subject: Re: Sleep problems with kernels >= 2.6.21 on powerpc

Hi

[Adding STR wizards to CC]

On 26/08/07, Rogério Brito <rbrito@...il.com> wrote:
> Hi.
>
> Unfortunately, it seems that kernels later than 2.6.21 have problems
> letting my powerpc iBook (G3 processor) going to sleep (suspend to
> ram).
>
> The userland that I am using is a Debian testing (lenny) and the
> default kernel that comes with it is 2.6.22, with some patches applied
> and pbbuttonsd (as the daemon for making the machine sleep).
>
> With kernel 2.6.21, from Debian (and other earlier kernels), the
> symptoms that I see when I press the power button is that the machine
> goes to sleep and the led that indicates that the machine is sleeping
> is blinking normally.
>
> If I, on the other hand, use Debian's kernel 2.6.22 or compile my own
> kernel with just the necessary parts for my work (version 2.6.23-rc3
> taken from kernel.org), then I can't make the machine sleep: when I
> press the button, it acts like if I had, in sequence, pressed anything
> to wake it up (say, like pressing shift).
>
> I have already grabbed Linus's git tree and I am willing to do some
> cycles of "git bisect" to discover the point where it stopped working.
>
> I just thought that others may have seen such behaviour before or, if
> not, that being informative about what I see is of use for debugging
> this.
>
> I would also appreciate any guidance on this as I wish kernel 2.6.23
> to be working again on powerpc machines.
>
> Please, if any tests are required, don't hesitate to ask me and I will
> try to whatever is needed to restore the correct behaviour of sleep
> with the Linux kernel.
>
> I have copied mailing lists that I think that are relevant. If they
> aren't, then please let me know. I would also appreciate if I were
> kept on carbon copies as I am only subscribed to debian-powerpc at the
> moment.
>
>
> Regards, Rogério Brito.
>
> P.S.: It unfortunately doesn't matter if I switch to a console or if I
> am in X when I press the power button with recent kernels.
> -

Regards,
Michal

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