linux-kernel - Re: Suspend to disk broken in latest 2.6.28-rc3

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Message-ID: <20081110221343.GA17951@mobydick>
Date:	Mon, 10 Nov 2008 23:13:43 +0100
From:	Mathieu Chouquet-Stringer <mchouque@...e.fr>
To:	Pavel Machek <pavel@...e.cz>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, linux-kernel@...r.kernel.org,
	linux-pm@...ts.linux-foundation.org,
	Alex Deucher <alexdeucher@...il.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Dave Airlie <airlied@...hat.com>
Subject: Re: Suspend to disk broken in latest 2.6.28-rc3

On Mon, Nov 10, 2008 at 10:42:39AM +0100, Pavel Machek wrote:
> Trying with minimum drivers is likely to help here, and should be
> easier than bisect. Boot with init=/bin/bash, then try "devices" >
> pm_dest and disk > state...

Some progress with (2.6.28-rc4 this time)...  I've booted with /bin/bash
as init: works.

Then I rebooted in single mode => works
Runlevel 3 => works
Runlevel 5 => doesn't work

In terms of devices, lsmod says the only differences between runlevel 3
and runlevel 5 are that both drm and radeon are loaded...

If I rmmod radeon and drm while X is running suspending the devices
works...  I guess I don't have DRI enabled???  Just looked at the logs,
I guess I don't [1]...

Looking at a git log -p of gpu/drm/radeon shows lots of difference
between 2.6.26 and HEAD...  I see a vblank change [2] that changes the
way the device is suspended, not sure if it really matters though...

Alex, Jesse and/or Dave can you think of anything before I bisect?  FYI
my radeon is a:
ATI Technologies Inc Radeon Mobility M7 LW [Radeon Mobility 7500] rev 0,

Cheers,
Mathieu

[1]
(EE) RADEON(0): Static buffer allocation failed.  Disabling DRI.
(EE) RADEON(0): At least 21263 kB of video memory needed at this resolution and depth.

[2] Commit 0a3e67a4caac273a3bfc4ced3da364830b1ab241
-- 
Mathieu Chouquet-Stringer                           mchouque@...e.fr
            The sun itself sees not till heaven clears.
	             -- William Shakespeare --
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