In regards to comment #22, in order to run X -configure, you must not have X running. The best way in my experience to accomplish this is to switch to a virtual console with Ctrl-Alt-F1, and stop GDM with "sudo /etc/init.d/gdm stop"
In regards to comment #22, in order to run X -configure, you must not have X running. The best way in my experience to accomplish this is to switch to a virtual console with Ctrl-Alt-F1, and stop GDM with "sudo /etc/init.d/gdm stop"