Forwarding this bug from Ubuntu reporter Kees Cook:
http://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/597094

[Problem]
I've noticed that a number of SDL applications do not animate any more when run under compiz.  Attaching an example that shows this.  (It should animate forever, but under current compiz (i915 driver drm) for me, it will hang immediately or after a few seconds.)

Possibly this is related to or a duplicate of https://bugs.freedesktop.org/show_bug.cgi?id=28573  

DistroRelease: Ubuntu 10.10
Package: compiz 1:0.8.4-0ubuntu16
ProcVersionSignature: Ubuntu 2.6.34-5.14-generic 2.6.34
Uname: Linux 2.6.34-5-generic x86_64
Architecture: amd64
CompizPlugins: [core,ccp,move,resize,place,decoration,text,dbus,regex,commands,imgjpeg,png,gnomecompat,mousepoll,session,svg,neg,resizeinfo,vpswitch,workarounds,animation,snap,fade,cube,scale,expo,rotate,ezoom,scaleaddon,staticswitcher]
Date: Mon Jun 21 20:44:21 2010
PackageArchitecture: all
PciDisplay: 00:02.0 VGA compatible controller [0300]: Intel Corporation 82Q35 Express Integrated Graphics Controller [8086:29b2] (rev 02)
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.34-5-generic root=/dev/mapper/systemvg-root2lv ro quiet splash
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.utf8RelatedPackageVersions:
 xserver-xorg 1:7.5+6ubuntu1
 libgl1-mesa-glx 7.8.1-3ubuntu2
 libdrm2 2.4.20-2ubuntu1
 xserver-xorg-video-intel 2:2.11.0-1ubuntu2
 xserver-xorg-video-ati 1:6.13.0-2ubuntu2
SourcePackage: compiz
XorgConf:
 Section "ServerFlags"
 	Option	"DontZap"	"False"
 EndSection
dmi.bios.date: 09/22/2008
dmi.bios.vendor: Intel Corp.
dmi.bios.version: JOQ3510J.86A.0954.2008.0922.2331
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: DQ35JO
dmi.board.vendor: Intel Corporation
dmi.board.version: AAD82085-800
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrJOQ3510J.86A.0954.2008.0922.2331:bd09/22/2008:svn:pn:pvr:rvnIntelCorporation:rnDQ35JO:rvrAAD82085-800:cvn:ct3:cvr:
system: distro = Ubuntu, architecture = x86_64, kernel = 2.6.34-5-generic