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

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Message-Id: <200902190029.36808.fzu@wemgehoertderstaat.de>
Date:	Thu, 19 Feb 2009 00:29:36 +0100
From:	Karsten Wiese <fzu@...gehoertderstaat.de>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	ZhangRui <rui.zhang@...el.com>, 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

Am Mittwoch, 18. Februar 2009 schrieb Jesse Barnes:
> 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

Same dmesg entries here. Also PC sometimes hangs at start after attached
analog-monitor switches to "no signal", when normally X11's cursor shows. 

Patch makes no difference to dmesg entries.


thanks,
Karsten
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