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

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Date:	Wed, 18 Feb 2009 21:56:19 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
Cc:	ZhangRui <rui.zhang@...el.com>, dri_devel@...ts.sourceforge.net,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: i915 regression in 2.6.29-rc5

On Wednesday 18 February 2009, 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
> 
> Note to Rafael: this is not a regression from 2.6.28 since the KMS code is new 
> with 2.6.29.

Yes, I know.  It's already been reported for a couple of times. ;-)

Thanks,
Rafael
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