linux-kernel - i915 regression in 2.6.29-rc5

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Message-Id: <1234927467.4707.15.camel@rzhang-desktop>
Date:	Wed, 18 Feb 2009 11:24:27 +0800
From:	ZhangRui <rui.zhang@...el.com>
To:	dri_devel@...ts.sourceforge.net,
	LKML <linux-kernel@...r.kernel.org>
Cc:	jbarnes@...tuousgeek.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	"Zhang, Rui" <rui.zhang@...el.com>
Subject: i915 regression in 2.6.29-rc5

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

thanks,
rui

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