Comment 31 for bug 948180

This bug is still present in the release of Precise, and it not limited to nVidia cards (I have an ATI Radeon HD6870 using the binary driver). Exact same symptoms as the original reporter: computer is still alive and running, but all I havbe when this triggers is a black screen and a movable mouse cursor. I have to ctrl-alt-F1 and reboot to recover (restarting X isn't enough). I run XFCE and xscreensaver, not gnome, so clearly the problem is somewhere lower-level.

I find this happens mostly when I come back from suspend, but not always - sometimes it happens if I just leave the computer idle and in the screensaver for long enough.