Bug#480689: xserver-xorg-video-intel: uses lots of CPU with Compiz and (new default) EXA
An workarround to fix this problem on my i915 is:
1) Create /etc/environment (because this file is missing on Lenny):
# touch /etc/environment
2) Add INTEL_BATCH="1" option in /etc/environment:
# echo INTEL_BATCH="1" >> /etc/environment
3) Edit /etc/X11/xorg.conf, adding 3 options in video card device:
Option "AccelMethod" "EXA"
Option "ExaNoComposite" "false"
Option "MigrationHeuristic" "greedy"
4) Restart
After this, I fix all problems with CPU usage, and get +40% FPS:
Before this steps
$ glxgears
2650 frames in 5.0 seconds = 529.914 FPS
2648 frames in 5.0 seconds = 529.482 FPS
2648 frames in 5.0 seconds = 529.484 FPS
After this steps
$ glxgears
3686 frames in 5.0 seconds = 737.145 FPS
3690 frames in 5.0 seconds = 737.940 FPS
3706 frames in 5.0 seconds = 741.062 FPS
Regards,
Renato S. Yamane
Brazil
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