The Z shape is characteristic of some graphics drivers. It's not a problem in the driver but it does suggest the app is displaying half- finished frames (on top of the previous frame).
So next I recommend trying different MPV command line options to change the rendering/decoding method. Sorry I don't know any more details... -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1845102 Title: [radeon] Video tearing in Gnome-MPV/Celluloid in Xorg sessions (but not Wayland) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-mpv/+bug/1845102/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs