Hello everyone,

Please let me know what logs/command outputs I can give, not sure what would
help you all out.

I recently bought an AMD RX 550, first GPU with the Polaris architecture (so I
assume growing pains here), and am experiencing a bug where HDMI at 4k 60 fps
is not working, but DisplayPort does. 

HDMI 4k60fps is working for me under Windows, so to me it's safe to say this is
a Mesa problem. 

This was happening on Mesa 17.0.5 and 17.2 git on OpenSUSE Tumbleweed, in
addition to Mesa 17 on Ubuntu 17.04.