Comment # 7 on bug 108606 from Alex Deucher

(In reply to Samantha McVey from comment #6)
> Yeah I have the latest linux-firmware installed. I also have raven_dmcu.bin
> which just was added so I'm certain I have the latest, since I installed the
> git version 3 days ago (when I read that Raven Ridge had its firmware
> updated).

So to confirm, the newest firmware did not help?  Please provide the output of
/sys/kernel/debug/dri/0/amdgpu_firmware_info