Hi! I know that the nvidia-drv-x11-package is from RPMForge, but I thought I might mention it here. I have a machine with a NVidia-card and because of the ease of use I use the rpmforge-package for that. After upgrading the problem was that during rebooting as soon as the machine hit the RHGB (which implicitly uses that driver) the machine froze. I booted into the old kernel removed rhgb, rebooted. Now the machine froze when starting X. Same procedure: Old Kernel. Remove nvidia-drv-x11. Reboot into the new kernel and reinstall nvidia-drv-x11. After a reboot everything works as it used to. The cause of the problem could have been (sorry, I didn't do any thorough forensic) that the nvidia.ko that was used in the new kernel was a symbolic link from the "weak-updates"-directory into the old kernel "extra"-directory. Is it possible that this only works inside of kernels with the same x in CentOS 5.x ? For the other machines I am upgrading I plan to 1. deinstall nvidia-x11-drv 2. do a regular "yum upgrade" 3. reinstall nvidia-x11-drv after reboot Is there any better way to do it? Bernhard PS: the main purpose of this message is to alert others to this problem, not to get an answer, although that would be nice