Say, I just ran gnome on top of kde, and its run on another display than my current 0. So yes, it loads on my monitor, but returns a dialog that says that a display server has already been started, so gdm will run on display 1. Clicking okay only returns more errors of the same type, recursively.

Except I don't really know what its doing. Because ctrl-alt-backspace only shuts down the current display.

So its possible to load several displays on one monitor? I thought it was more of a hardware thing with a hub or something, so I am confused...if it is possible, how do I solve this error? Could come in useful...

I always use cltr-alt-<F1>...<Fxx> to switch between the consoles (RedHat AS 2.1) and that works fine

Edit your /etc/X11/xdm/xservers file and copy your line (begining with 0: local) below the existing line. here is an example:

:0 local /bin/nice -n -10 /usr/X11R6/bin/X -deferglyphs 16 -depth 16 -nolisten tcp
:1 local /bin/nice -n -10 /usr/X11R6/bin/X :1 vt08 -deferglyphs 16 -depth 16 -nolisten tcp

Then once that is done..

# service dm restart

You should now be able to toggle between F7 and F8 (one as KDE and one as Gnome if you wish) or one logged in as root and the other as user?

You could also specify which screen to use. First do startx as normal then hit ctrl-alt-f2 and do startx /usr/bin/fluxbox --:1
that would load fluxbox onto ctrl-alt-f8
Replace fluxbox with any window manager of your choice.