Thanks. This is starting to sound like general problems with the nouveau kernel driver, or maybe GPU memory corruption, since multiple desktop environments are broken.
Next please try the latest kernel packages from https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.5-rc7/ ** No longer affects: mutter (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1860483 Title: [nouveau] screen background overlaid with scan type artifact in red To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1860483/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
