This sounds like a combination of bug 1769383 and something else. Can you please provide a photo of the issue so we can figure out what the second part is?
** Package changed: xorg (Ubuntu) => gnome-shell (Ubuntu) ** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete ** Tags added: nvidia ** Also affects: gdm3 (Ubuntu) Importance: Undecided Status: New ** Changed in: gdm3 (Ubuntu) Status: New => Incomplete ** Summary changed: - No unlock screen + [nvidia] Lock screen is a black background with pixel garbage. Bitmap garbage flashes on the screen when interacting with anything. ** Summary changed: - [nvidia] Lock screen is a black background with pixel garbage. Bitmap garbage flashes on the screen when interacting with anything. + [nvidia] After resume the unlock screen is a black background with pixel garbage. Bitmap garbage flashes on the screen when interacting with anything. ** Tags added: resume suspend-resume -- 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