I just wondered if some old computers laying around here could still be used for some games if I completely cut off the display manager. Is there a way to start a gui program from the command line in a new (and only) Xsession, even without lxde? I doubt it doesn't need compiz, but can I somehow configure it to only show that window?
If there is, is it still easy to have at least a small border (or frame or something like that) with a cross to terminate and close the Xserver? I'd like to use it eg. for Minecraft or Starbound.