[Cooker] Monitor unexpectedly turns off

[Jure Repinc]

Now it happened a couple of times to me. I was just working something 
and monitor just unexpectedly turned of. Just like it would enter some 
powersaving mode of turned of or something. No amount of mouse movement 
and keyboard typing turned it on. I had to restart the computer. This 
shouldn't happen, especialy not while working (moving mouse and typing). 
And if it would be result of idle time then the monitor should be back 
from power saving mode into normal operation right after moving the 
mouse ot using keyboard.

I have ATI Radeon 8500, XFree86 4.3.0 (22mdk) and kernel 2.4.22.6.