This could be Onboard crashing on something. If so, there should be an error message + traceback in /var/log/lightdm/.
Does this print anything interesting? sudo su zgrep -i onboard /var/log/lightdm/* -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1562734 Title: Onboard keyboard shows black box on login To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/onboard/+bug/1562734/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
