Unity has just crashed and the following is displayed when I try to restart it by running the command
Initializing bailer options...done Initializing detection options...done Initializing composite options...done Compiz (opengl) - Fatal: No valid GL extensions string found. Compiz (bailer) - Info: Ensuring a shell for your session Cannot register the panel shell: there is already one running
This computer has been running Unity for the last few days with no problems, so this is not likely a hardware issue.
What do I have to do to get Unity to restart?