The weird thing is that if I type "gnome-screensaver", I get this output:
** (gnome-screensaver:10543): WARNING **: salvaschermo giĆ in esecuzione in questa sessione Which means that it's already running in this session. There's something wrong with it, and I still can't start a guest session. -- Impossibile to start a guest session https://bugs.launchpad.net/bugs/461288 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