https://bugs.freedesktop.org/show_bug.cgi?id=104347
--- Comment #16 from Norbert Klar klarnorbert@gmail.com --- Found some articles from early 2017, and many RX4xx/5xx users report this problem. Any chance to get a fix?
https://askubuntu.com/questions/910124/amd-graphics-rx-480-displaying-artifa...