have you tried using Lilu+whatevergreen? Since mojave, you have to use the platform id/properties thing vs the usual way to inject graphics (e.g. the iGPU) that worked in high sierra. There was a post on tonymac about how to enable power management for graphics. My hackintosh is a desktop so all i had to do was inject the iGPU with a headless platform id and everything works OOB. Lilu+WEG handles everything
@saudor - I have tried Lilu+WhateverGreen and didn't notice any difference. Thanks for the suggestion! I might need to try again now that I have made system changes.
Your IORegistry screenshot shows the gpu-control properties for HDGraphics. Would you be able to select the gpu-control for the NVidia graphics and capture another IORegistry screenshot for me? I'd like to see the gpu-control and IOHWControl attributes for the NVidia graphics. Thank you!