I tried Lubuntu 21.04 (hirsute hippo) and I can see that is better because you removed themes in log in screen but bug is still exist on my Radeon card (Radeon X2300). You should consider fix it. I will try other distro to test this. Maybe this is problem only with Lubuntu.
-- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to sddm in Ubuntu. https://bugs.launchpad.net/bugs/1865837 Title: Lubuntu 20.04 qa-test install; flashing at sddm greeter when mouse at top panel (pre-login) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sddm/+bug/1865837/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs