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

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Date:	Thu, 19 Feb 2009 11:24:45 +0800
From:	Zhang Rui <rui.zhang@...el.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	"dri_devel@...ts.sourceforge.net" <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

well, now I can see the cursor when system resumes.
I can even move the cursors but that's all.
screen is blank, and system hangs if I try to do the second suspend.
dmesg attached.

thanks,
rui

On Thu, 2009-02-19 at 01:53 +0800, Jesse Barnes wrote:
> 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
> 

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