Comment 14 for bug 550218

I'm experiencing the very same problem with my Lenovo R61 notebook and 64bit Lucid. (Unfortunatelly with apport-collect I keep getting "No additional information collected" message with anything being uploaded so I'll try to describe my configuration and how to reproduce the bug manually.).

This is what Xorg says about my graphics card:

(--) PCI:*(0:0:2:0) 8086:2a02:17aa:20b5 Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller rev 12, Mem @ 0xf8100000/1048576, 0xe0000000/268435456, I/O @ 0x00001800/8

This is how to reproduce the bug:

1. Install all required development packages to be able to build clutter.
2. Download and build clutter 1.2.4.
3. Go to tests/interactive and run some of the tests, i.g. test-viewport.
4. Run and close the test repeatably - Xorg will crash eventually when closing the window. (It seems that the probability of crash is higher just after the system boot. But maybe it's my impression only.)

Not sure if it's related, but I also get the following message in the console after executing the test:

do_wait: drmWaitVBlank returned -1, IRQs don't seem to be working correctly.
Try adjusting the vblank_mode configuration parameter.

I have also tested this with desktop PC using Nvidia proprietary drivers and wasn't able to reproduce this behaviour.