linux-kernel - Re: i915 regression in 2.6.29-rc5

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Message-Id: <200902180953.05364.jbarnes@virtuousgeek.org>
Date:	Wed, 18 Feb 2009 09:53:05 -0800
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	ZhangRui <rui.zhang@...el.com>
Cc:	dri_devel@...ts.sourceforge.net,
	LKML <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: i915 regression in 2.6.29-rc5

On Tuesday, February 17, 2009 7:24 pm ZhangRui wrote:
> Hi, all,
>
> I got an i915 failure in 2.6.29-rc5.
>
> problem description: the screen doesn't come back after suspend/resume.
> A workaround is to boot with "nomodesetting".
>
> I got this error message during i915 driver load time,
> [   22.606749] mtrr: type mismatch for e0000000,10000000 old: write-back
> new: write-combining [   22.606752] [drm] MTRR allocation failed
> [   22.606753] .  Graphics performance may suffer.
>
> and this during s3 suspend,
> [ 1093.793257] PM: Syncing filesystems ... done.
> [ 1093.797692] PM: Preparing system for mem sleep
> [ 1094.119502] [drm:i915_get_vblank_counter] *ERROR* trying to get vblank
> count for disabled pipe 1 [ 1094.514290] Freezing user space processes ...
> (elapsed 0.00 seconds) done. [ 1094.514726] Freezing remaining freezable
> tasks ... (elapsed 0.02 seconds) done.
>
> the problem seems to be related with commit
> 9880b7a527ffbb52f65c2de0a8d4eea86e24775e

I posted a test patch for this problem (among others related to KMS 
suspend/resume), care to give it a try?

http://lists.freedesktop.org/archives/intel-gfx/2009-February/001406.html

-- 
Jesse Barnes, Intel Open Source Technology Center
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