This is maybe a day one issue. I have DQ77KB which is used for pfsense. Every time i disconnected the video cable, i lose the video signal, meaning if i connect it back there is no signal.
The only way to get the signal back is it reboot the system.
I tried the 2 different video ports(displayport and HDMI) as well as usb video adopters and i see the same behavior.
Any thoughts or advice?