Finally I could make it work!
How I fixed:
Downgraded to 2018 Rehab version, both IASL and maciASL
Fixed only 1 error, and the rest showed as just "warnings"
Thank you, @Gigamaxx and @Middleman for trying to help me.
And I still wonder why the SSDTs I tried didn't work but the DSDT did.
I extracted my system DSDT.aml, disassembled using this guide: https://www.tonymacx86.com/threads/guide-patching-laptop-dsdt-ssdts.152573/
Copied the code here to fake id my gpu: https://www.tonymacx86.com/threads/amd-radeon-rx-550-560-injected-with-opencore-macos-big-sur.306669/#post-2204885...
Yes I cleaned the NVRAM, and still would get stuck on "applekeystore..."
It only booted completely again after I remove these 2 lines:
<string>VGA compatible controller</string>
But still the same "7mb" graphics problem
I try to get a...
So I only add the " DeviceProperties" part on my config.plist, right?
Thanks for trying to help me.
And now I noticed that the audio is "baffin" and only the video is "lexa pro"
[ Lexa PRO [Radeon 540/540X/550/550X / RX 540X/550/5 Display controller VGA compatible contr 0/NPE3@2/GFX0@0 display PciRoot(0x0)/Pci(0x2,0x0)/Pci(0x0,0x0)
[ Baffin HDMI/DP...
I tried and it didn't work.
But thanks for trying to help me.
It seems like OC is not there yet when it comes to GPU fake ID.
I got back to Clover for now, and it's working fine.
But I still wish to make it work on OC because the system boots faster and it looks more stable.
So if anyone find...
Can someone please take a look on my thread?
2 months passed and I still haven't figure it out how to solve it.
I have the same problem with RX550 card, but I'm trying with SSDT method.
I sucessfully installed Big Sur on a x79 motherboard with OC.
But I still have a problem, I can't get the RX550 4GB graphics to work.
And I found a SSDT showing how to fake ID a RX550. (check "SSDT-DELL-5820-X299-RX550.aml")
I edited the part of GPU ACPI path to mine but it still didn't...