Help!!!...all Games Crash

[elmaster84]

Im desperate!!!
every game I try to run on Ubuntu Hardy Crashes after 15~20min.!!
Ive Installed
GLEST
ASSAULTCUBE
SAUBERBRATEN (CUBE2)
ALIEN ARENA

and all of them crash after 15 min of gameplay...
My computer freezes up and I have to killall the processes

Please...if anyone has any idea of why this happens!!!

[sirdilznik]

Are you overclocking?

[barbedsaber]

turn off the screensaver, and the thing that makes the monitor turn off. I had the same problem, and that was the souloution.