Comment 234 for bug 204996

Have same problem on two machines (totally different architectures). Kernel 2.6.24-18
System and keyboard go freeze (numlock stays ON and can't be turned off), but still you can move mouse over your screen, but that's all.

Haven't observed any CPU load when it happens.

Happens randomly, except of one thing: it always hangs that way with some screen savers.
Immediately, either when you just select them and see them in the preview or after screen saver starts after some idle time.
See: http://ubuntuforums.org/showthread.php?t=828271

If you need some more details just please tell me and will provide them straightaway!