[Linux Mint 20 XFCE]
I'm trying to setup a dual-monitor configuration with only one physical monitor. I have (2) GPUs, a GTX 1050 TI and Radeon R9 290, both connected to an Acer 27" XF270H via HDMI. My system sees both displays, but switching to the 2nd GPU on HDMI2 gives me a blank screen. Is...