What videocard do you use? It seems like the 3d doesn't work for the second xsession on your configuration and that the bailer doesn't manage to fall back to unity-2d
** Summary changed: - Guest session from a running session is different and weird compared to guest session from the login screen + Guest session from a running session fails to start unity or bail out to another desktop ** Package changed: lightdm (Ubuntu) => unity (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/875785 Title: Guest session from a running session fails to start unity or bail out to another desktop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/875785/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs