https://bugzilla.kernel.org/show_bug.cgi?id=209987
--- Comment #8 from Lee Starnes (lstarnes1024@gmail.com) --- (In reply to Alex Deucher from comment #6)
Does this patch work any better? https://www.mail-archive.com/amd-gfx@lists.freedesktop.org/msg54780.html
This looks better than my patch. I've been using it for the last week or so with my RX 480 and it has been working.