linux-kernel - Re: [2.6.22-rc3][ACPI?] Resume from s2r doesn't work.

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Date:	Sat, 2 Jun 2007 21:08:18 +1000
From:	"Mitch Davis" <mjd-kernel@...rk.com>
To:	"Olaf Dietsche" <olaf+list.linux-acpi@...fdietsche.de>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	"pm list" <linux-pm@...ts.linux-foundation.org>
Subject: Re: [2.6.22-rc3][ACPI?] Resume from s2r doesn't work.

Hi Olaf,

I'm also having troubles with the resume part of STR, although since
your hardware is significantly different to mine, the cause is likely
to be different.

On 6/2/07, Rafael J. Wysocki <rjw@...k.pl> wrote:
> > >>
> > >> > On Friday, 1 June 2007 22:27, Olaf Dietsche wrote:
> > >> >> When I resume, everything seems to come up (fan becomes busy, disk and
> > >> >> dvd spin up for a short time),
>
> First, you can check if the patch
>
> http://www.sisk.pl/kernel/hibernation_and_suspend/2.6.22-rc3/patches/20-ACPI-preserve-the-ebx-value-in-acpi_copy_wakeup_routine.patch
>
> helps, by chance.

(Rafael's suggestion may help you but it didn't help me)

> Second, you can use PM_TRACE (Documentation/power/s2ram.txt) to find the
> place where it really fails.

I modified my kernel source so it uses PM_TRACE to trace both the
suspend, and whether the BIOS ever jumps back into the kernel on
resume.  (In my case, I don't think the BIOS is doing the jump).

I also compiled with only the bare minimum of options turned on, and
use an initramfs to rule out device interactions.

If what I did is useful to you, you can find it here:

  http://bugzilla.kernel.org/show_bug.cgi?id=7988

And if you haven't already (and your problem occurs with a stock
kernel), you might want to log this as a bug like I did.

Hope this helps.

Mitch.
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