dupe closure may be appropriate for
- https://askubuntu.com/questions/1332678/parts-of-display-glitching-ubuntu-20-04
- https://askubuntu.com/questions/1331896/screen-rendering-issue-after-upgrade-from-5-8-0-48-to-49-and-50
- https://askubuntu.com/questions/1331116/pc-has-started-breaking-and-become-very-unstable