Thanks for the bug report. You appear to be using Wayland at the moment. Can you please try logging into Xorg instead? It's the option on the login screen titled "Ubuntu" instead of "Ubuntu on Wayland".
** Summary changed: - Screen flickering white vertical lines + [HP 120-1100eo API] Screen flickering white vertical lines ** Package changed: xorg (Ubuntu) => mutter (Ubuntu) ** 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/1939173 Title: [HP 120-1100eo API] Screen flickering white vertical lines To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1939173/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs