Demo crashes at Ubuntu 9.04 x86_64 (ATI card)

[pfloom]

I'm having a very similar problem.

After a while playing (during which the game works very well), the game returns to windowed mode, and while there's still some jerky mouse interaction possible, no keyboard commands work (not even ctrl+alt+backspace etc), and I pretty much can't to anything but reboot. I can get to a shell with ctrl+alt+f1, but "kill"ing the process has no effect, nor does trying to shut down x windows (telinit 3).

I'm using Ubuntu 9.04 x86_64 w/ AMD X2 4000 (I think) procesor, and an NVIDIA 9600 GT card.

I may or may not have found a solution, however:
Turning off compiz seems to stop it(running "metacity --replace" in the terminal). At least, it hasn't crashed yet after I've been playing without compiz.