The bug doesn't happen again, so I can't verify. But I think it was the login screen.
I suspect Google Chrome to be the source of the problem because it was open when I had the problem. And every time I run it there are little display glitches and bugs. Here are links to recent bugs that have occurred on my computer: https://errors.ubuntu.com/oops/5b6d80ac-19ac-11ed-b0f2-fa163ef35206 https://errors.ubuntu.com/oops/59d2182a-19ac-11ed-a558-fa163e55efd0 https://errors.ubuntu.com/oops/5820fb06-19ac-11ed-972d-fa163e993415 https://errors.ubuntu.com/oops/232819b4-19ac-11ed-b0f2-fa163ef35206 https://errors.ubuntu.com/oops/72855f8a-19a2-11ed-b0f2-fa163ef35206 https://errors.ubuntu.com/oops/22ba6f90-163c-11ed-a536-fa163e55efd0 https://errors.ubuntu.com/oops/e00263d2-0f4a-11ed-b041-fa163ef35206 https://errors.ubuntu.com/oops/830626e2-9ba5-11eb-9727-fa163ee63de6 -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1987228 Title: Bug display when turning to hibernation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1987228/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs