Comment # 6 on bug 100949 from Luya Tshimbalanga

Last commit that worked prior to the breakage was on 20170410. I just updated
to the recent 20170511 which seems partially resolving the issue but the error
message below still remains.

[22328.935171] [drm:amdgpu_atombios_dp_link_train [amdgpu]] *ERROR* displayport
link status failed
[22328.935217] [drm:amdgpu_atombios_dp_link_train [amdgpu]] *ERROR* clock
recovery failed