I had many many issues with this intel gm965/gl960 video card before
(with ubuntu 8.04 and 8.10)

*It didn't support opengl 2.1 
*lot of graphics errors on it's interface
*Google earth worked really bad, windows "collapsed" and things strange

With ubuntu 9.04 now I can work with opengl 2.1 but in it's default 
installation, it still had error 2 and 3 and also I experienced some 
performance issues. 
With it's default installation glxgears gives me only 60 FPS in my laptop (Too 
bad). 

After add  Option "AccelMethod" "UXA"  in my xorg.conf file glxgears starts 
working arround 400 FPS (more than 4 times improved the speed) and all errors 
before are fixed. 
I don't know exactly why it happens, but when I added  Option "AccelMethod" 
"UXA" to my xorg.conf everything seems to be working fine and google earth 
works great! 

Is it a fix for this issue or just a work arround?

-- 
MASTER: Poor graphics performance on Intel
https://bugs.launchpad.net/bugs/252094
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