R9 390 8gb issue 7mb Bigsur!!

[Polyman]

@Polyman
I use the same method to activate my R9 270 GPU, I don't use any bootflags so try removing these flags from the NVRAM section i the config:
raddvi radpg=15
After removing these flags reboot the system. reset the nvram and boot into macOS and see if anything changes.

still nothing maybe it worked with intel cpu
if you active igpu dgpu work
send me your efi

 

[Cyberdevs]

here it is:

 

[Polyman]

here it is:

still nothing i recheck again my motheboard bios setting
b450m pro-vdh bios

 

[Cyberdevs]

@Polyman
I regenerated the SSDT-GPU-Spoof.aml and I removed the device properties.

My SSDT addresses the GPU like this:
{
External (SB.PCI0, DeviceObj)
External (SB.PCI0.PEG0.PEGP, DeviceObj)

and your previous one addresses it like this:

{
External (SB.PCI0, DeviceObj)
External (SB.PCI0.GPP8.GFX0, DeviceObj)

Myabe that's why it doesn't work on your end.

 

[Polyman]

@Polyman
I regenerated the SSDT-GPU-Spoof.aml and I removed the device properties.

My SSDT addresses the GPU like this:
{
External (SB.PCI0, DeviceObj)
External (SB.PCI0.PEG0.PEGP, DeviceObj)

and your previous one addresses it like this:

{
External (SB.PCI0, DeviceObj)
External (SB.PCI0.GPP8.GFX0, DeviceObj)

Myabe that's why it doesn't work on your end.

still didn't work i did before many times
try different spoof with gfx0 without
try also many fake id nothing work

 

[Cyberdevs]

Maybe try to rebuild caches with a tool like Onyx and clear nvram or just do a clean install with that last EFI.
I'm getting out of ideas.

 

[Polyman]

I'm thinking using clover bootloader
with inject ati option i did before with my old pc amd fx 6100 + ati hd6770 1gb works in High sierra reconize gpu