I have the same problem
When I turn off Optimus in the BIOS the system starts up but the screen is black
I tried various configurations in SMBIOS (MacbookPro 10.1, MacBookPro 11.2, MacBookPro 13.1) but nothing, always the same.
I used Franckenstien EFI and started Mojave successfully but my nVIDIA K5100M didn't work.
I went back to High Sierra thinking it might be a problem in the OS but the nVIDIA K5100M doesn't work in High Sierra either
Please can anyone help
config.plist.zip