Comment # 51 on bug 109206 from moreginger@warpmail.net

Also cannot boot without nomodeset or modprobe.blacklist=amdgpu. With the
latter, I get a black screen if I run `modprobe amdgpu`.

I have Ryzen 2400G.

The trick with moving raven_dmcu.bin (as per below) didn't help.

```
mv /lib/firmware/amdgpu/raven_dmcu.bin ~/
update-initramfs -u
```

On Ubuntu/Linux 5.1.0.