https://bugs.freedesktop.org/show_bug.cgi?id=107509
--- Comment #6 from Michel Dänzer michel@daenzer.net --- (In reply to monkeyinastripedshirt from comment #5)
You would know better than me but I'm unsure if my card supports it.
I wouldn't have asked if it didn't. :)
All the packages are installed but it never loads. Blacklisting the radeon drivers [...]
Don't blacklist radeon, pass
radeon.cik_support=0 amdgpu.cik_support=1
on the kernel command line.