Having a similar issue with Ubuntu Studio 18.04, I found this solution: https://xubuntu.org/news/laptop-users-fix-available-for-the-black- screen-on-unlock-bug/
Possibly the same thing? In my case, I even had to first install Light Locker Settings, to then be able to turn it on and off. I thought this might be useful for people landing here when searching for this issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1803400 Title: xubuntu 18.04.1 locking to black screen 4.19.2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/light-locker/+bug/1803400/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
