CENTOS KERNEL PANIC Adding iommu=soft at the end of /boot/grub/grub.conf solved my problem. kernel /vmlinuz-2.6.32.9-70.fc12.x86_64 ro root=UUID=4ee473b4-633e-462c-9819-ce1071456b57 LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYBOARDTYPE=pc KEYTABLE=us rhgb quiet nouveau.modeset=0 iommu=soft Reply With Quote To do this, just boot off the same CD that you used to install the OS, choose Rescue and answer the first few questions normally, then when it drops you into a shell use: vi /mnt/sysimage/etc/selinux/config