Ok, I'm running Windows 10, I have an RX480+ with 3 identical 1920x1080 ASUS monitors, connected via DP/HDMI
One monitor is a singleton and is physically in Landscape, with landscape orientation
The other two monitors are physically in Portrait, but are in a Landscape Eyefinity (4320 x 3840) group
If I set the singleton monitor to be my primary desktop, RDP to my (also Windows10) Laptop works Ok
If I set the Eyefinity group to be my primary desktop, RDP to my Laptop just gives me a black screen
-any ideas ?