I'm not seeing this bug at all in a newly installed 21.04 Pi4. Can you please update and retest?
** Changed in: mesa (Ubuntu) Status: New => Incomplete ** Changed in: xorg-server (Ubuntu) Status: New => Incomplete ** Changed in: mesa (Ubuntu) Importance: Low => Medium ** Changed in: xorg-server (Ubuntu) Importance: Low => Medium ** Bug watch removed: github.com/raspberrypi/linux/issues #4080 https://github.com/raspberrypi/linux/issues/4080 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1911030 Title: Graphical flashes on a raspi 4 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/1911030/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs