https://bugs.freedesktop.org/show_bug.cgi?id=100058
--- Comment #6 from Michel Dänzer michel@daenzer.net --- FWIW, since all display outputs are connected to the iGPU, it's unlikely that using amdgpu instead of radeon will have any effect on the external display turning on and off. You'd have to bring that up with the iGPU drivers.