Here's the rror from the GDM log when the system attempts to bring up X in run level 5: GDM: Xserver not found: /usr/X11R6/bin/X :0 -audit 0 -auth /var/gdm/:0.Xauth -nolisten tcp vt7 Error: Command could not be executed! Please install the X server or correct GDM configuration and restart GDM. This keeps happening since X.org was modularized.