iATKOS Inside: HELP Skyake HD530 iGPU on Catalina - 🥴 framebuffer not working, with artifacts

HELP Skyake HD530 iGPU on Catalina - 🥴 framebuffer not working, with artifacts

I have desperately tried to get my Skyake HD 530 iGPU working in Catalina. I have tried everything I can find.

But i believe basically the framebuffer isn't loading. I can boot, and install, but get artifacts all around the screen (see first screenshot)

https://preview.redd.it/41wofjkalgc61.jpg?width=4032&format=pjpg&auto=webp&s=556c71c9a1eaefc6dffdf0ef9cbed86581b782ca

I have tried:

Most of the display IDs (aka AAPL,ig-platform-id) listed in Whatever Green guide for Skylake (0x19260000, 0x19270000, 0x191B0000, 0x193B0000, 0x19120000, 0x19120001, 0x193B0005, 0x191B0006). These are the ones specifically for HD 530 (as seen here).
I tried keeping the device-id as 19120000, AND also tried another time by changing it to match the same AAPL,ig-platform-id each time.
Currently SMBIOS is iMac 17, 1, but I have also tried MacBookPro13,3 (according to this) as I am only running the iGPU (no dGPU). Still doesn't work.
ASRock BIOS > Shared Memory set to 64MB . I get hung/trouble with other values.
Intel Power Gadget, always shows GFx line always flat
Verified I have working NVRAM
VDADecoderChecker throws an error
I have tried using Hackintool to unplug and plug ports. The machine can currently boot in both DP & HDMI but with these artifacts. My ASRock Z170 mobo has:
- 2 x HDMI ports
- 1x DP ports

When I check Hackintool for every combo above, only the LVDS line shows (if at all).

The value never changes regardless if I am using HDMI or DP... EVERY TIME in red it is always:

Index 0, BusID 0x00, Pipe 8, Type LVDS, Flags 0x00000098

When I go to "About This Mac" it shows HD 530 18MB...

But whyyyyy... I'm struggling.

I cannot even patch conX... because I don't know any of them work, or what goes to what.

DOES ANYONE HAVE ANY ADVICE?

IS WHATEVERGREEN FOR HD 530 NOT WORKING?

MY DISPLAY CONFIG IS THIS:

DeviceProperties > Add	`PciRoot(0x0)/Pci(0x2,0x0)`
AAPL,ig-platform-id	`00001219`
device-id	`19120000`
enable-hdmi-dividers-fix	`01000000`
framebuffer-patch-enable	`01000000`
framebuffer-stolenmem	`00002002`
framebuffer-fbmem	`00005001`

enable-hdmi-dividers-fix - relates to this, to fix the infinite loop when the graphics driver tries to establish a HDMI connection with a higher pixel clock rate, for example connecting to a 2K/4K display with HDMI 1.4.

WHAT GUIDE OR TOOL I FOLLOWED:

OpenCore install, Whatever Green and subsequently ALL THE GUIDES POSSIBLE 💀

WHAT FILES/CONFIG I'M USING

Config.plist - https://pastebin.com/9SduWAbU

Debug info - https://pastebin.com/ymVPcHnc

EXTRA INFO

These images here show: https://imgur.com/a/7kZ5pQ6