Comment 51 for bug 159594

This issue still seems to be present in Lucid - I experienced a number of white (or light grey) screen crashes lately.

As it is rather hot here these days, at first I thought this could be related to an overheating graphics adapter (xserver-xorg-video-ati and the 2.6.32 kernel do not support power management), but I saw the system crash just yesterday after having placed an extra fan above the GPU's heatspreader, so I guess this might rather not be a hardware related issue.

Currently, I am suspecting compiz to be involved in this somehow; since having deactivated it, I haven't experienced the crash again. Crashing generally rather infrequently, of course it is too early to definitely blame the issue on compiz though..