[CentOS] CentOS 7 and 4K display

Sat May 7 18:54:15 UTC 2016
Jon Forrest <nobozo at gmail.com>

On Windows (completely different software I know)
I've never been able to get 4K monitors to work
using HDMI 1.2. They always max out at 1080. Simply
using DisplayPort, everything else being equal,
fixes the problem. Same on Macs.

Jon Forrest