Hi, I installed CentOS 5 on a client's machine yesterday afternoon. He phoned me in the evening to tell me that his desktop "froze several times upon him", and he had to hard-reboot it. The last time this happened to me was with some exotic wireless card whose driver had problems with SMP. But here, I have no wireless card. So the only suspect is the NVidia Geforce 4000 card. The only non-standard thing I did in my install was to install the proprietary NVidia driver from nvidia.com. I knew afterwards this was not a good thing to do, since the RPMForge repos do have an nvidia-legacy drivers. I remembered this too late. Anyway. I'm due to return to the client in a few hours time next morning. I wonder if reverting from "nvidia" to "nv" in xorg.conf could solve my problem. As for updates, the system is up to date. But I admit I'm a bit clueless. Any suggestions? Niki