[i945GM] (Needs 2.6.31) Screen goes wild when doing simple 3D work

Created an attachment (id=27963)
XorgLog.txt

I've seen this with compiz on and off. With compiz _on_ I get wild screen corruption when doing anything like flipping workspaces. With compiz _off_ the same effect happens when running a simple python opengl program. Will attach a video taken with my phone mp4 format, hope you can play it because the ogv version made using ffmpeg2theora is vastly accelerated frame rate, but does show the issue. Also will attach the python code which causes the issue.

ProblemType: Bug
Architecture: i386
Date: Thu Jul 23 15:13:16 2009
DistroRelease: Ubuntu 9.10
MachineType: TOSHIBA Portable PC
Package: xserver-xorg-video-intel 2:2.8.0-0ubuntu1
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-3-generic root=UUID=0534c5bb-a9db-4db7-972d-43fb11be0f54 ro quiet splash
ProcEnviron:
 LANGUAGE=en_GB.UTF-8
 PATH=(custom, user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-3.19-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu5
 libgl1-mesa-glx 7.5-1ubuntu1
 libdrm2 2.4.11-1ubuntu1
 xserver-xorg-video-intel 2:2.8.0-0ubuntu1
 xserver-xorg-video-ati N/A
SourcePackage: xserver-xorg-video-intel
Uname: Linux 2.6.31-3-generic i686
dmi.bios.date: 05/22/2008
dmi.bios.vendor: TOSHIBA
dmi.bios.version: Version 3.80
dmi.board.name: Portable PC
dmi.board.vendor: TOSHIBA
dmi.board.version: Version A0
dmi.chassis.asset.tag: 0000000000
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: Version 1.0
dmi.modalias: dmi:bvnTOSHIBA:bvrVersion3.80:bd05/22/2008:svnTOSHIBA:pnPortablePC:pvrVersion1.0:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
dmi.product.name: Portable PC
dmi.product.version: Version 1.0
dmi.sys.vendor: TOSHIBA
fglrx: Not loaded
system:
 distro: Ubuntu
 architecture: i686kernel: 2.6.31-3-generic

[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub [8086:27a0] (rev 03)
 Subsystem: Toshiba America Info Systems Device [1179:0001]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03)
 Subsystem: Toshiba America Info Systems Device [1179:0001]

Your bugzilla wouldn't permit the video attachment, so here's some links:
http://launchpadlibrarian.net/29420273/23072009011.mp4
http://launchpadlibrarian.net/29420275/CurrentDmesg.txt
http://launchpadlibrarian.net/29420289/glxinfo.txt
http://launchpadlibrarian.net/29420306/23072009011.ogv
http://launchpadlibrarian.net/29420355/lesson02.py

*** Bug 22987 has been marked as a duplicate of this bug. ***

Looks like fifo issues to me. You might want to try with current drm-intel-next, which has some fifo fixes.

Yep, looks like FIFO underruns to me too... Fixes are in Eric's tree queued for 2.6.31.

Created an attachment (id=29042)
increase assumed display fetch latency

Assuming the latest kernel bits don't fix this bug, this patch should.

*** Bug 22983 has been marked as a duplicate of this bug. ***

Fix in 2.6.31:

commit bcc24fb42585dc9f490cf7789a917358414bdab5
Author: Jesse Barnes <email address hidden>
Date: Mon Aug 31 10:24:31 2009 -0700

    drm/i915: increase default latency constant (v2 w/comment)

*** Bug 22983 has been marked as a duplicate of this bug. ***