I have a very strange problem...
After the computer is turned on for two or three days (with X running), it just freezes. I can't move the mouse, the keyboard doesn't work (even numlock) and I can't switch to console. The only thing that helps is to reset the computer.
At first I thought that something was wrong with RAM, but I've run memtest86 and it didn't show any errors.
Any ideas on how to solve this would be greatly appreciated!