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I believe the issue is that it tries to display the Unity splash screen regardless of the command line options. I have a Jenkins server, though...
If possible, try running it wrapped in xfvb-run (Ubuntu package xfvb). On my not headless server with Jenkins, I also had to have the Jenkins...
Seems pretty clearly a file permission issue. Did you copy the files over using a different UNIX user than you are running Mono as? Maybe root...
I think you are running into the same issue I was having, while setting up automated builds (via Jenkins). I believe the editor tries to display...