[beagleboard] Setting the Beaglebone auto login in Ubuntu lxde

gdmsetup used to be part of the Gnome desktop but AFAIK is not part of
the actual Gnome anymore.

X11-GUI needs some target,
- either a graphic card
- or a virtual graphic card like some VNCServer. thightvnc you may
start with crontab @reboot
- or you can export some single programs over ssh (ask Google for "ssh
x11 forwarding")
- or ....