Comment 11 for bug 120834

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Bryce Harrington (bryce) wrote : Re: intel gm965 freezes with 3d applications

There are also directions for obtaining a backtrace available here: https://wiki.ubuntu.com/DebuggingXorg

I'm not able to generate a crash running glxgears on a 82G965 system...

If someone able to reproduce this issue could run it through the debugger and get a backtrace it may help. Make sure you have -dbg packages installed so you can get line numbers in the sourcecode.