Whew. I've rebooted my development machine hundreds of times since I got the ryzen5 with amdgpu graphics. Finally, it's not freezing. I don't think I have a framebuffer yet, but I'm happy. You can now get this chip.
ps. blah. Days without a freeze. I write this, and pow!
That may have been a reaction to the KDE on screen display, which sends stupid things. We'll see.