Developing Samurai-X ive definatly needed to be running two X servers. Finding how to do this on Ubuntu was a bit of a pita so here is a quick guide:
sudo dpkg-reconfigure x11-common
select "console users"- create/copy a .xinit file, make sure it has at least something like
exec /usr/bin/xterm
- Press Control+Alt+F1 and login
- Run
xinit .your-xinit -- :1
- Switch to the new x server with Control+Alt+F9
You can run more by changing the :1 to :2 or whatever
Ive read lots of alternatives but this is the only way Ive got it to work on Ubuntu Hardy.