I have an existing ssh connection between my computer (A:12.04) and a remote computer (B:10.04) (from A I just type ssh B). I have root access on both. Both use ubuntu desktop edition. I am struggling to set up a remote desktop solution. After a lot of different software and tries, the closest I got was to be able to connect to the vnc server with vinagre, but the screen remained black, for an unknown reason.