Bug 22831

Summary:	2.8rc regression on GM45: glxgears: black window with "failed to acquire vblank counter, -22" in dmesg
Product:	xorg	Reporter:	Simon McVittie <smcv>
Component:	Driver/intel	Assignee:	Eric Anholt <eric>
Status:	RESOLVED FIXED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	major
Priority:	medium	CC:	cworth, leonidp.lists
Version:	unspecified	Keywords:	regression
Hardware:	x86-64 (AMD64)
OS:	Linux (All)
URL:	http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=537400
Whiteboard:
i915 platform:		i915 features:

Description Simon McVittie 2009-07-18 03:34:55 UTC

This might be the same as Bug #22587, but the symptoms are rather different, so filing it separately. Logs etc. available from <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=537400>.

When running glxgears on a Lenovo X200s (Intel GM45) with the following software, a black window is displayed; resizing the window causes fragments of the normal display to be visible momentarily.

* Intel driver: 2.7.99.902-1 (Debian unstable), also seen with yesterday's git
master (commit bb30073) merged into the Debian packaging

* Kernel: 2.6.31rc3 (buildserver.net snapshot) with and without i915.modeset=1,
also seen with 2.6.30 (Debian unstable) without i915.modeset=1

* libdrm: 2.4.11 (Debian unstable), also seen with 2.4.11+git+20090630+de1ed01
(experimental)

* Xorg: 1.6.2 (Debian unstable), also seen with prereleases

Downgrading xserver-xorg-video-intel to 2.7.1 (from Debian unstable) makes
glxgears work correctly (while keeping the other components the same) so this
is a regression in 2.8.

Comment 1 Gordon Jin 2009-07-19 18:06:13 UTC

Eric/Carl, can you reproduce? (Q2-rc3 is working fine on my GM45.)

Comment 2 Gordon Jin 2009-07-19 18:07:38 UTC

*** Bug 22838 has been marked as a duplicate of this bug. ***

Comment 3 Simon McVittie 2009-07-21 04:37:11 UTC

Upgrading to Mesa 7.5 fixed this for me; perhaps the new Intel driver tickles a recently-fixed Mesa bug or something?

Comment 4 Eric Anholt 2009-07-21 11:38:19 UTC

Works for me with mesa 7.4, 7.5, or master, but I'm on server master.

Are you still concerned with following up on this?

Comment 5 Leonid Podolny 2009-07-21 15:17:58 UTC

(In reply to comment #4)
> Works for me with mesa 7.4, 7.5, or master, but I'm on server master.
> 
> Are you still concerned with following up on this?
> 

I'm not sure what this question means, but I'm pretty concerned with this bug.

(I'm the original poster of Bug 22838)

Comment 6 Gordon Jin 2009-07-21 18:23:52 UTC

Simon, what's the previous mesa version used in your original report?

I guess this bug could be closed.

Leonid, if upgrading to mesa-7.5 doesn't fix it for you, you could reopen your bug.

Comment 7 Simon McVittie 2009-07-22 04:54:13 UTC

I was previously using Mesa 7.4.4 from Debian unstable.

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