Have you tried monitoring temperature probes during hang and no hangs?

I did not have such trouble... But I did upgrade my D630's BIOS

http://linux.dell.com/wiki/index.php...itory/firmware

I think trying out methods to cool down the guts of that Dell are cool... Perhaps a laptop cooler base could make you forget the problem. Specially, as you use the computer AC-only...

Perhaps you could try using something as cpulimit to try to lower the max revs on the computer and avoid overheating... however, I agree that if this comes from the GPU, this could not help at all...

I don't know any fix for this currently. I no longer use the D630...

Have you tried changing the video driver... I ended up not using the last version as it would drive the fans crazy... and it worked better.

I hope you continue to share your experience.

Regards and good luck.

A.