You need to specify the "Virtual" option in xorg.conf to set the max total screen size to something larger. The Screen Resolution tool in GNOME can do this for you automatically or you can edit xorg.conf yourself.
The issue of having to set Virtual at all is a known issue already reported and tracked elsewhere.
You need to specify the "Virtual" option in xorg.conf to set the max total screen size to something larger. The Screen Resolution tool in GNOME can do this for you automatically or you can edit xorg.conf yourself.
The issue of having to set Virtual at all is a known issue already reported and tracked elsewhere.