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<< Solved >> Unable to remove/disable Nvidia graphics card in Big Sur custom built Mac

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PrasadK said:
Thanks everyone for responses.

@Middleman I had tried some of those already. device-id is optional for HD 530 as I understand from dortania's guide but I put that in as you suggested. framebuffer-fbmem is optional and I had tried that in the past but not this time. I didn't see npci=0x2000 nvda_drv_vrl=1 in NVRAM section - so, nothing to remove. PciRoot with gfxutil shows the output slightly different than dortana's guide. Full list of gfxutil output without -f is attached - perhaps I am missing something.
% mac/gfxutil-1/gfxutil -f GFX0
04:00.0 10de:1c82 /PCI0@0/RP05@1C,4/GFX0@0 = PciRoot(0x0)/Pci(0x1C,0x4)/Pci(0x0,0x0)
Still no luck. black screen right when login window shows up. attached the config.plist screenshot.

@Feartech before disabling the dGPU with PCIe root, I set the "DVTM Pre-Allocated" ("DVTM Total Gfx Men" is set up 256MB) to 128MB and 256MB. Both didn't work.

Some other observations:
1) kextstat shows that some Nvidia kexts loaded (when I am able to login without trying to disable dGPU)
kextstat|grep -i -e "nvidia"
Executing: /usr/bin/kmutil showloaded
No variant specified, falling back to release
112 0 0xffffff7f9b8c7000 0x2000 0x2000 com.apple.nvidia.NVDAStartup (16.0.0) B7E8FE3A-5A44-3EA0-9A3B-345B583BFF31 <14 5 3>
2) NVIDIA PCIe card fan is spinning
Click to expand...
your GTX 1050 Ti is not supported on Big Sur
 
@macntosh There is no CSM settings I see in bios. It is Gigabyte UEFI Dual BIOS.
I had taken a photo of boot process. Attached the same if that helps. Couple of sections are interesting. I don't know what they mean.
 

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Feartech said:
your GTX 1050 Ti is not supported on Big Sur
Click to expand...
I am not trying to get it to work. I am trying to remove it. It crashes at login screen if I remove/dsiable it. Trying to find way to remove it without losing resolution or crash.
 
PrasadK said:
@macntosh There is no CSM settings I see in bios. It is Gigabyte UEFI Dual BIOS.
I had taken a photo of boot process. Attached the same if that helps. Couple of sections are interesting. I don't know what they mean.
Click to expand...
you need to disable your serial port in your bios
 
PrasadK said:
Did that, thanks.
Click to expand...
you probably mean Skylake.. :)
you could just go with:
i7-6700K

also remove your nvidia from your system and don't forget to disable your serial port
 
Feartech said:
you need to disable your serial port in your bios
Click to expand...
I tried first serial port. No luck. Then parallel port and still no luck. Thank you.
 
macntosh said:
Your GA-H170M-DS3H Manual clearly shows it exists.
Click to expand...
Below that manual says it is not available for other OS. Thanks for checking.
This item is configurable only when Windows 8/10 Features is set to Windows 8/10 or Windows 8/10
WHQL.
 
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