I am experiencing exactly the same problem, the desktop freeze after click login and the keyboard does not response. I think systmed is the most probable cause since I found this in auth.log:
Jul 18 18:13:22 weihong-pc systemd-logind[1176]: Failed to issue method call: Unknown unit: autovt@tty6.service But I have no ideas how to fix this problem. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1283826 Title: lightdm hangs after updates To manage notifications about this bug go to: https://bugs.launchpad.net/gdm/+bug/1283826/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs