First: I'm not sure that I'm posting to the correct forum. Apologies in advance for that.
I have two machines, both running Ubuntu 12.04. One is a normal desktop connected to my network via WiFi. The other is an older desktop running headless and on a wired connection to the same LAN.
I use the headless machine as a light home server for storage and the like. I would like to be able to manage it on my main machine via VNC (or something similar), but I've had limited success. It worked for awhile using Remmina, but now, when I try to connect to the headless machine, Remmina (and all other clients I've tried) just hang on the "Connecting" dialog (see attachment).
I know that the network is working okay, because I have an SMB share on the headless machine that is mounted every time the other machine boots, and I can still access and modify files on that share.
I've found that if I force the headless machine to shut down and reboot it, I can access it for awhile. Eventually, though, the connection dialog will start stalling and I haven't identified any activity that gets me to that point, other than closing the VNC connection and trying it again awhile later.
I'm at a loss. Where should I go from here? Is there an error log somewhere that I could post?