linux-kernel - Re: [ibm-acpi-devel] suspend/hibernation regression between 2.6.19 and 2.6.20 w/ Thinkpad T41

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Date:	Wed, 8 Aug 2007 09:04:16 -0300
From:	Henrique de Moraes Holschuh <hmh@....eng.br>
To:	Toralf Förster <toralf.foerster@....de>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	ibm-acpi-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	Pavel Machek <pavel@....cz>
Subject: Re: [ibm-acpi-devel] suspend/hibernation regression between 2.6.19
	and 2.6.20 w/ Thinkpad T41

On Wed, 08 Aug 2007, Toralf Förster wrote:
> Am Dienstag, 7. August 2007 17:38 schrieb Rafael J. Wysocki:
> > Actually, you don't need the patch above, just do
> > "echo shutdown > /sys/power/disk" before the hibernation (or use
> > BTW, can you please try this patch before you do that:
> > http://www.sisk.pl/kernel/hibernation_and_suspend/2.6.23-rc2/patches/19-ACPI-Enable-GPEs-before-_WAK-is-called.patch
> 
> This patch applied at commit cfee47f doesn't solve the regression.
> 
> > 
> > So place "echo shutdown > /sys/power/disk" before that into your script.
> yep, that works for me.

FYI, some other thinkpad models break badly if you use shutdown instead of
platform.  Sound goes away on wake, etc.

I am still very suspicious that the way we do wake-from-suspend-to-disk is
to blame... I wish we loaded the kernel just once, maybe from the boot
loader.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh
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