In the previous LTS version (14.04) this issue didn't occur. I switched to Ubuntu GNOME because of this issue, the unlock screen works correctly now. I hope this gives you more information for diagnosing the problem.
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1617471 Title: Can't login after lock screen (black screen) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1617471/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp

