On both machines I have
- Desktop Sharing and
- Remote Desktop Viewer (vinagre)
up and running. On both machines in Desktop Sharing Preferences I have enabled
- Allow other users to view your desktop and
- Allow other users to control your desktop
But almost nothing is working. The only thing that is working is that from the 14.04 machine's Remote Desktop Viewer I can see both of the machines on the network. Selecting the 12.04 machine results in a brief hang and then a "Connection closed" message. From the 12.04 machine I can't see any machines on the network from Remote Desktop Viewer so I can't even try to connect.
Any ideas how to start debugging this?