Interesting, I start to understand this bug. When I updated from Kubuntu 10.10 to 11.04, there was, indeed, a message, just before logging in, about my 'kde' session not being valid anymore and that I should choose a valid one, or else the 'default' session would be used. I chose the new name 'kde-plasma', but anyway the warning dialog appeared.
If I understand it right, using (or not using) the 'default' session is the cause of the problem? But the bug itself seems to be the default) insted of default|"") ? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/710144 Title: Xsession: unable to launch "" X session --- "" not found; falling back to default session. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs