Update I have written down some info given when starting my computer Failed to start the X server. It is likely that it is not set up correctly. Would you like to view the X server output to diagnose the problem?
Clicking yes gives X Window System Version 7.2.0 Fatal error running install command for nvidia (EE) NVIDIA(O) Failed to load the nvidia kernel module! (EE) NVIDIA(0) Aborting (EE) Screen(s) found, but none have a usable configuration. Fatal server error no screens found. -- X.org crashes after 7.04 distribution upgrade https://launchpad.net/bugs/88743 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs