Comment 24 for bug 367546

Solved for me. No longer getting the error in Xorg.0.log and my video performance is better than before. MythTV, vlc and gmplayer work at full screen using a fraction of the CPU. Still some choppy video with Miro, and Totem is not displaying video but I am not getting the error.

I had luck by Reverting the Jaunty Xorg intel driver to 2.4 as explained in this link

https://wiki.ubuntu.com/ReinhardTartler/X/RevertingIntelDriverTo2.4

Then I edited

xorg.conf adding the following to the "Device" section
 Option "MigrationHeuristic" "greedy"
 Option "AccelMethod" "xaa"

I don't know if changing gstreamer-properties Default output to "X Windows System (No Xv)" had any effect but it is working so I also left it.

Just in case you are wondering. Here is the result of "lspci -nn | grep VGA"
00:02.0 VGA compatible controller [0300]: Intel Corporation 82865G Integrated Graphics Controller [8086:2572] (rev 02)

If I have some time I will try moving up to 2.8 as explained here:
https://wiki.ubuntu.com/X/Troubleshooting/IntelPerformance