[ubuntu] my graphics card runs slow after upgrading

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http://ubuntuforums.org – Hi all. This weekend i from upgraded Ubuntu 8.10 to 9.10. My problem is when I tried to play tremulous. First i noticed that my frame rate has dropped from 90 to around 50 or 60 fps.the other problem is that when I tried to quit the game it freezes and I have to crtl+alt+f1 into another console to kill it. I have an Intel Mobile GM965/GL960 Integrated Graphics Controller. I appreciate any help. Thanks (Hardware)