https://bugs.freedesktop.org/show_bug.cgi?id=108824
--- Comment #9 from LoneVVolf lonewolf@xs4all.nl --- reverting commit https://cgit.freedesktop.org/mesa/mesa/commit/?id=78e35df52aa2f7d770f929a086... solves the visual corruption and gets rid of the gpu fault messages in dmesg.
As that commit is 2/2 of the patchset referenced in commit #4 , it does look like this introduces new errors. see https://bugs.freedesktop.org/show_bug.cgi?id=110701