I did some random trial and error debugging. There's always a login screen on console 1 and there's always a desktop GUI on console 2. It's sometimes waking from sleep into display 2 while still locked. There's a dock, a system menu, and random bitmap garbage. Hitting CTRL-ALT-F1 goes to the login screen. After logging in, it jumps to a normally working display 2.
Not sure if it's related: CTRL-ALT-fkey is sometimes generating app keyboard events rather than switching consoles. Installing 18.04 completely corrupted my system and I had wipe the disk. This isn't an old crusty installation. -- 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/1809407 Title: [nvidia] After resume the unlock screen is a black background with pixel garbage. Bitmap garbage flashes on the screen when interacting with anything. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1809407/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
