How can I start a second X Server on the Jetson Tk1 ?

I tried:
#X: 1 /*start second X server

Which gave me the error:
(EE) AddScreen/ScreenInit failed for driver 0

Do I need to use an other command or is it a driver problem ?

How have you configured the second X.Org? I would assume they can’t e.g. use the same display. I don’t know at all, if the driver would support two X.Orgs on different displays…

Is should be possible to switch between X Servers (localhost:0.0 and localhost:1.0) with CTRL-ALT-F7 and CTRL-ALT-F8 when you got the second X Server running.

This would enable to run a second Window Manager for graphical login to local host or remote host.
An other way would be to use VNC Server for a graphical login on a remote device, but
currently this seems to be limited to a unity-session (I tried this with tightvnc server on a Ubuntu 12.04 box).