The specific part of the screen shot with obvious corruption is cropped below. I'll try to get a video; one problem I have is that many of the specific things I do that reliably show the problem are at times when private data is visible on my screen.
I _cannot_ show this problem without the XrandR command (or some GUI- configured equivalent), because it seems to only happen with external DisplayPort monitors attached. When I use _only_ the internal laptop panel things appear to work correctly (or did last time I checked, I very seldom run only one display). I believe the problem is triggered by either 1) daisy-chained DisplayPort monitors or 2) the sheer size of my desktop (11520x2160). I will try to find something that reliably corrupts that is not sensitive to get a video, and I will test with no external displays attached and verify that that is still error-free. ** Attachment added: "corruption.png" https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1893969/+attachment/5412195/+files/corruption.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1893969 Title: Screen corruption and delayed update using onboard Intel video To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1893969/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs