I reinstalled Ubuntu and the problem was fixed. It was the xorg.conf that made the problem.
-- Switch user does not work https://bugs.launchpad.net/bugs/117385 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
