Ubuntu 7.10 Gutsy Gibbon NVIDIA problem
My computer froze when I used Desktop Effects (Desktop effects = Beryl, Compiz, etc) and the problem lied with the drivers for NVIDIA that needed to be updated. I solved it by opening up the Console and logged in as root and ran the following:
sudo apt-get install nvidia-glx
No more computer freeze!
I have the same problem, I have a geforce 7200Go, take a look at this http://www.nvnews.net/vbulletin/showthread.php?t=99168&highlight=7200