Issues with second monitor. High Sierra, iGPU, Coffee Lake

Hi there-

My system has been very stable over the past few months. I have only been using this system with a single display thus far. I set it up with dual displays today and have not been able to get the second display to show anything. What is most interesting is that when I boot into Win10 on this same system, it also does not recognize my second monitor? This makes me think it might be a BIOS level issue? I tested both monitors with a separate system and they are both working as normal.

Here are the specs of the system and monitors.

System: Intel i5 8400 iGPU - Intel UHD 630 Gigabyte HD3P Z370 board

Dell 1080p monitor connected via DVI Samsung 4K monitor connected via HDMI. (DP is also an option for both display & mobo, however I cannot seem to find any extra DP cables laying around so would rather go with HDMI, but if I need to buy a DP cable for some odd reason, I'm willing to)

Thank you!

submitted by /u/DeutscheAutoteknik
[link] [comments]