[Bug 418394] [NEW] 3D applications stutter / don't appear to sync with the screen on .31 kernel

[Jacob Peddicord]

Public bug reported:

Binary package hint: xserver-xorg-video-intel

On karmic with an i945:

OpenGL applications and games stutter in a strange way. I'll see a few
frames at full motion, and then a very short pause. A few more full
frames, then another pause. Repeat. This happens two to three times a
second. However, none of these applications notice any framerate drops.
Glxgears reports it is blitting at 4500 frames every 5 seconds, but
taking into account the stuttering there is likely a lot less actually
being displayed. Nexuiz is claiming a solid 30 to 40 FPS, though it also
exhibits this strange behavior. Compositors do not appear to be
affected.

I have no issue with the 2.6.30 kernel series from earlier Karmic
packages. Everything runs at full speed without any issue. (To that
point, I'm not sure if this should be reported against the kernel. Or
mesa.)

This issue persists:
 - with and without compositing
 - with and without KMS
 - with and without forced vsync in driconf

This *might* be related to bug 416073, however the issues described
there are about lower framerates overall, so I'm doubtful this is a
duplicate.

ProblemType: Bug
Architecture: amd64
Date: Mon Aug 24 21:42:13 2009
DistroRelease: Ubuntu 9.10
MachineType: Dell Inc. MM061
Package: xserver-xorg-video-intel 2:2.8.0-0ubuntu2
PccardctlIdent:
 
PccardctlStatus:
 
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-6-generic root=UUID=58ddeb93-f27c-462a-af9b-5397a567cb78 ro quiet splash nomodeset
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-6.26-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu5
 libgl1-mesa-glx 7.5-1ubuntu1
 libdrm2 2.4.12+git20090801.45078630-0ubuntu1
 xserver-xorg-video-intel 2:2.8.0-0ubuntu2
 xserver-xorg-video-ati 1:6.12.99+git20090629.f39cafc5-0ubuntu6
SourcePackage: xserver-xorg-video-intel
Uname: Linux 2.6.31-6-generic x86_64
XorgConf: Error: [Errno 2] No such file or directory: '/etc/X11/xorg.conf'
dmi.bios.date: 06/13/2007
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A17
dmi.board.name: 0KD882
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA17:bd06/13/2007:svnDellInc.:pnMM061:pvr:rvnDellInc.:rn0KD882:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: MM061
dmi.sys.vendor: Dell Inc.
fglrx: Not loaded
system:
 distro:             Ubuntu
 architecture:       x86_64kernel:             2.6.31-6-generic

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug

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3D applications stutter / don't appear to sync with the screen on .31 kernel
https://bugs.launchpad.net/bugs/418394
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