https://bugs.freedesktop.org/show_bug.cgi?id=109206
--- Comment #23 from Adrian Garay adrian.garay@outlook.com --- I am on firmware F.20 and the above does not work for me. I still see the scrambled line of garbage at boot, but instead of crashing my screen just goes blank.
If I add modprobe.blacklist=amdgpu to the kernel I can boot, where I then SSH in and record the log file while running modprobe amdgpu from the laptop (attached.)