I had Ubuntu up and running very well. I then decided to update to 12.10 and the upgrade process seemed to go through very well too.
When I started the computer again, all I got with a Terminal login: The only message, which appeared on the screen was:
Ubuntu quantal (development branch) ubuntu tty1. ubuntu login:
How can I start the system in the graphical mode? What must I do to use the graphical system again?
Please advise as I can't work with the terminal mode.