https://bugs.freedesktop.org/show_bug.cgi?id=107823
--- Comment #9 from raxondmc@gmail.com --- @Jan:
Can you see if you get the black screen if you set amdgpu.dc=0 in the grub boot line?
I am interested to help and learn something new, if you do not mind :)
I dont have the monitor or else i would have tried it here!