I'm experiencing this same issue again in Ubuntu 19.04; the login screen keeps the monitor on forever.
I can either keep my laptop completely turned off when I'm not using it, or else I risk burning Ubuntu's login screen into my expensive 4K monitor. ** Tags added: disco -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1773504 Title: Login Screen won't allow monitor to turn off To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1773504/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs