Hi, I have two monitors connected via HDMI and DVI-D to a AORUS GeForce® GTX 1080 8G 11Gbps. The DVI-D is an older monitor and only has DVI-D and D-sub. The HDMI monitor is connected to the rear panel of the graphics card. I connected an Oculus Rift VR unit. The headset has an HDMI and USB connector. The Oculus Rift is connected to one of the internal HDMI sockets on the graphics card. I restarted the computer as I read in the manual that the graphics card will automatically detect the VR unit. The VR USB connects fine, but the VR HDMI will not connect.
I noticed on the specification info on the graphics card web page this:
I/O Standard mode (Dual-link DVI-D*1, DP1.4*3, HDMI 2.0b*1)
VR mode (DP*3, HDMI*3)
This suggested to me that in VR mode, the DVI-D socket is unsupported. I unplugged the DVI-D so I am now just running one monitor that is connected via HDMI on the rear panel and the VR HDMI that is connected to an internal HDMI on the graphics card. The VR headset now works fine.
QUESTION. How can I reconnect my second monitor with the DVI-D socket, so that I have both monitors and the VR headset all working? Why did the VR headset not work with the DVI-D monitor connected?