Issues with HDMI (nvidia)

[rajverma1985]

Hello thanks for all the support and help, if you can please look into the problem reporting files here.
I have everything working on high sierra except these:

1. HDMI audio
2. brightness controls
3. Black screen while boot when external monitor is connected to HDMI

I have an alienware 15r4 with GSYC display(here intel doesn't work) and nvidia is the primary GPU for everything. I did inject device properties for 630UHD as it was causing problems during boot.

My biggest issues is the external monitor doesn;t work when i boot and it works fine if i turn it on post boot. Basically when i'm done with boot and password prompt comes in and then if i turn the external monitor on it works just fine.
Also this laptop has intel directly connected to the usb-c for display and doesn't have any connection with HDMI. Only nvidia has the direct HDMI port connection.

Also, i have tried doing a kext to patch for appleHDA and also tried PEG0 ssdt but that doesn't seem to be working.
7757.zip