Hi, I'm kinda of a a newbie at Ubuntu but i'm able to run Counter-Strike 1.6 in windowed mode with Wine with no problems. But after a couple of minutes of gameplay(fragging, dying). The game freeze and the whole computer freeze. I only hear the sound that repeats on and on and i'm forced to do a shutdown(holding the power button).

I run a:

Manufacturer: IBM
Processor: Intel(R) Pentium(R) 4 CPU 3.20GHz (2 CPUs), ~3.2GHz
Memory: 1.5 GB RAM
Hard Drive: 80 GB
Video Card: ATI Radeon X1650 Pro 512MB
OS: Ubuntu 8.04