https://bugs.freedesktop.org/show_bug.cgi?id=108606
--- Comment #2 from Alex Deucher alexdeucher@gmail.com --- Did you also update mesa or X? Does reverting: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... help? if so, can you try the latest firmware for you GPU? If not, can you bisect?