I tried CTRL+ALT+BACKSPACE as was suggested here and in the Xorg
manpages but X just restarts right after hitting it. If I hit
CTRL+ALT+F1 past enough I get the console, but Xorg is still running
as a process and the Nvidia installer errors out saying xserver is
still running.

Am I doing something wrong or is there something in a config file
that's preventing Xorg from being shutdown? I'm using Xubuntu Fiesty
Fawn.