Complete X lockup when running beryl/compiz

[Amaranth]

When I'm running beryl or compiz on the 9629 driver I (randomly, usually infrequently) get what appears to be a complete system lockup. I can move the mouse but can't click on anything, caps lock and num lock don't work, and ctrl-sysrq-k/r do nothing.

I finally managed to have this happen when I was around another machine and managed to ssh into the locked system. Killing X and reloading the nvidia kernel module seems to fix things. I've got a nvidia-bug-report.log file that I'm attaching.

Note: I have not seen this problem when running metacity but since it happens so rarely it might just be coincidence.

[whig]

Don't load the dri X module with nvidia drivers. Besides, you are running development versions of various software so expect the odd problem. If too much revert to the latest stable.

[Amaranth]

This happened with the final release of Ubuntu 6.10 with the 9625, 9626, and 9629 drivers. It has nothing to do with my using the development version of ubuntu.