Apologies: I never saw this response asking for more information. I did solve the problem, as it turns out; it was Gromit-MPX, a tool I use allow me to draw on the screen. The problem disappears when I restarted Gromit-MPX.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1913742 Title: Fractional scaling: bottom half of screen black on external monitor disconnect To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1913742/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
