PandaMiner B3 Plus: Ubuntu 16.04 LTS: Blank screen after installing AMD drivers

[chiwalfrm]

Doing a fresh install of Ubuntu 16.04 LTS on the PandaMiner B3 Plus, the monitor (via HDMI output) works fine up to the point where I installed the AMD drivers (AMDGPU-PRO 17.10).

After a reboot, the monitor only displays an underscore (non-blinking) cursor and nothing else.  Yet the miner is up and running, I can ssh into it and run commands, programs, Claymore, etc.

Screenshot: http://imgur.com/a/66dLq

How can I re-enable the Desktop again?

Thank you.