I confirmed this should be xorg related, close as invalid. ** Changed in: gnome-control-center (Ubuntu) Status: New => Invalid
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871994 Title: The primary (built-in) display will cause black screen when external 4K monitor is configured to flipped To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1871994/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs