floodlitworld Posted August 27, 2017 Share Posted August 27, 2017 i7-6700k / Asus Z170 Pro / MSI GTX 970 / MacOS 10.12.6 / Sys Def 17,1 Monitors: Primary: LG Ultrawide (Display Port) Secondary: Acer 1080p (DVI-D) I'm having an issue recently with my dual display setup. If I boot with CSM enabled in the BIOS then only my secondary display works until the OS loads. If I boot with CSM disabled, then the boot screen/BIOS shows correctly on my primary display, but once the boot process hands over to the OS (when the loading bar reaches about half-way) then the video output dies and both of my monitors stay blank. Any ideas? Obviously I can work with the wrong monitor handling boot, but I'd prefer to have everything work properly. Thanks in advance. Link to comment Share on other sites More sharing options...
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