Comment # 9 on bug 100745 from Michel Dänzer

(In reply to Benjamin Bellec from comment #8)
> I hit the same problem today after enabling amdgpu.dc=1
> The screen doesn't light up at all if I boot the kernel with amdgpu.dc=1

AFAICT this report is about the non-DC code, please file your own report about
the issue with DC.