Q. Why does X crash when starting on Fedora Core 4?
A. There are interaction problems with SELinux (enabled by default on Fedora
Core 4) and the NVIDIA graphics driver. NVIDIA is investigating this, but
it is recommended that you append the kernel boot option "selinux=0" to the
kernel boot line in your grub.conf file. You must reinstall the NVIDIA
driver after adding this option.