I was able to run two monitors in Big Sur before updating to Monterey. 1 HDMI in the MoBo and 1 HDMI in the GPU. Now the only output is GPU and I am pulling my hair figuring out why.
Specs: (Motherboard) Gigabyte GA-Z170M-DH3 | i7-6700K (base clocked) | 32GB RAM DDR4 | Samsung 850Evo (500GB) | OpenCore 0.9.1
I tried changing the Framebuffer to an Empty one from 0x1912000 to 0x19120001, but that caused a hang up in the boot process so I haven't explored that any further. Next I tried following the Intel Patching Guide https://dortania.github.io/OpenCore-Post-Install/gpu-patching/intel-patching/connector.html but that lead to a dead end (and I suspect is the main culprit) as I do not have a "display0" mapped to an AppleIntelFramebuffer... Needless to say I'm lost.
Edit- Boot args include: -v, keepsyms=1, debug=0x100, keepsyms=1, alcid=3, swd_panic=1, igfxonln=1
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