https://bugzilla.kernel.org/show_bug.cgi?id=193651
--- Comment #21 from Steven A. Falco (stevenfalco@gmail.com) --- As I previously reported, building a custom kernel as suggested in comment 8 allows me to use my video card.
I do continue to get the powerplay error messages, but aside from slowing down boot a little, they don't seem to do any harm.