During the upgrade, ubuntu may have switched my driver from amdgpu to radeon. Following these instructions reactivate the amdgpu driver, and all seems to be well.
https://askubuntu.com/a/1236011/14747 ** Changed in: xserver-xorg-video-ati (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2068342 Title: screen turns to snow with radeon driver To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/2068342/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
