What is your username, what entry do you pick in the menu? The .xsession-errors is from your user or the one you try to switch to? It seems from the log that it tries to start a gnome-shell session for the user "cpbl"
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/861790 Title: choosing to switch users leads to dark screen, no options To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/861790/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs