I removed compiz and compiz-core and tried again. I tried logging on to a newly created account and succeeded. However, there is another problem I did not report in the previous post: When I logged out, I got a black screen, no mouse pointer this time, Ubuntu default logon sound (or was it the session welcome sound again? I have to return to this, since I'm writing this down on my laptop and it's the desktop that has the issues...). Ctrl+Alt+F1 gets me into TTY1 and "ubuntu-desktop login" prompt.
I have encountered this problem several times today, actually each time I logout from the Gnome session (also the main user session which otherwise works normally). So it seems to me this issue is not only related to Compiz. Please take a look also at another bug report I filed yesterday (it seems related): https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/283056 -- After login, blank screen, keyb. not responding, mouse works https://bugs.launchpad.net/bugs/284461 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs