On Tue, Nov 18, 2008 at 11:37:18AM +0100, Malte Forkel wrote: > The screen resolution is the same in all three installations > (1280x1024). I looked at /etc/X11/xorg.conf but didn't see any dramatic > differences. > > How can I configure the installations so the horizontal screen position > is the same with all of them? Try using the same mode line in xorg.conf on all three installations.