https://bugs.freedesktop.org/show_bug.cgi?id=102372
--- Comment #13 from Lyude Paul lyude@redhat.com --- Poke: this should be reverted, as mentioned in IRC enabling DC has unfortunately broken the displays on this TONGA GPU as well. GPU info:
[AMD/ATI] Tonga PRO [Radeon R9 285/380] [1002:6939] (rev f1)
more info https://people.freedesktop.org/~lyudess/archive/06-24-2018/4.17-rc-breaks-ly...