Thanks for the bug report. Please run:
lspci -kv > lspci.txt journalctl -b0 > journal.txt xrandr --verbose > xrandrv.txt apport-collect 1913742 both before and after the problem occurs. And attach the resulting text files here. In future, to save time you can report bugs using the 'ubuntu-bug' command which will do much of this automatically. ** Tags added: focal multimonitor xrandr-scaling ** Changed in: mutter (Ubuntu) Status: New => Incomplete -- 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 ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs