I went back further in the history of i915 changes and found the offending commit:
https://git.launchpad.net/~ubuntu- kernel/ubuntu/+source/linux/+git/groovy/commit/?id=c1484c9939 If you revert c1484c9939 then the bug goes away. ** Summary changed: - [i915] Noise-like lines of graphics corruption when moving windows in Xorg sessions (regression in 5.8.0-19-generic but 5.8.0-18-generic works) + [i915] Noise-like lines of graphics corruption when moving windows in Xorg sessions -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1896091 Title: [i915] Noise-like lines of graphics corruption when moving windows in Xorg sessions To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1896091/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
