[Catalina] [UHD 630] Some weird issues on my setup.

[cwunder]

Hey, y'all! I hope everyone is doing just right!

Continuing my saga with my ThinkCentre m920z I have the following issues on my system:

• When booting (with Verbose mode) it goes until the AppleHDA assertion and the gIOScreenLockState3 then the Apple logo appears with minimal backlight and the screen turns off for 3-5 minutes.
  • After these 3-5 minutes the screen turns on and there's full Backlight and Full Graphical Acceleration
• While booted and using the Mac, usually after 15-20 minutes using it completely freezes and I need to reboot
  • Tried connecting remotely via VNC but when it freezes I cannot connect
  • Nothing on Console.app or no Kernel Panic log
• I can only boot successfully on my Mac if I use EmuVariableUEFI.efi

What are my System specs

• ThinkCentre m920z
  • Motherboard: Lenovo 3122
  • All-In-One Model
  • BIOS
    • VT-d disabled
    • 64mb DVMT
    • Secure Boot disabled
  • i5 9500vPro (Coffee Lake Refresh)
  • Intel UHD 630 (Desktop)
    • Integrated Monitor:
      • LVDS Connector
      • 1920x1080 LCD Display
    • 1 DP (Full-sized Display Port) Port
    • 1 Type-C (USB 3.1) Gen2 that may be used for External Display
    • It's a Desktop GPU...
  • Intel Wireless AC
    • I already bought a Broadcom Card to replace the Intel One. Waiting for it to arrive
  • 16 GB RAM DDR4 (SO-DIMM) (Laptop Memory)
  • NVMe SSD (Brand: WPC) 256GB
  • Integrated Speaker (Realtek ALC235)
  • Integrated Microphone
  • Integrated SD-Card reader
  • Integrated Camera

What I have already done

• Clover 5104
  • Kexts: You may give a full look on my attached.
    • Using the latest version of each Kext.
• Hackintool
  • I already did the USB patches, all OK.
  • I did the GPU patches also
    • For some reason, I need to set Mobile GPU otherwise no Acceleration.
      • But when there's no Hardware Acceleration (if I put the Desktop Framebuffer):
        • Backlight is OK
        • But computer super unresponsible
    • Hackintool is accusing my LVDS display to be EXTERNAL when I boot from Clover on my SSD /EFI/
      • If I boot from Clover from an external USB it says my LVDS display is INTERNAL...
• Power Management seems to be fully working.
• Integrated Speakers, Microphones, SD-Card Reader and Camera are fully working
  • Headphone Jack working fine with Audio layout 14.
• Ethernet also fully working at full 1gbp/s
• Shutdown and Sleep are also working.

Attempts for GPU

• Tried already adjusting Backlight by following this: https://github.com/acidanthera/What...HD.en.md#adjusting-the-brightness-on-a-laptop
• Tried already to on System Parameters set a static backlight level 0x6203 (Maximum Backlight on my MacBook Pro, according to Hackintool)
• Tried already using ReHabMan BackLightFixup (https://github.com/RehabMan/AppleBacklightFixup)
• Tried using different Framebuffer options both for Mobile and Desktop
  • I'm still trying some combinations... Maybe I succeed with them.

What I need to understand

• Why this Backlight/Black Screen bug
• Why the computer randomly freezes after some time?
  • Intel Power Gadget seems all fine even when the PC freezes
  • Could it be GPU related?
  • SSD related? (When the computer freezes it looks like the HDD/SSD light indicator goes in morse code (on - off - on - off) for some time and then it stops.

Previous Threads for more insights:

1. Issues with booting to the Installer: https://www.tonymacx86.com/threads/issues-with-lenovo-thinkcentre-m920z.292615
2. KP's after the first boot: https://www.tonymacx86.com/threads/catalina-after-first-boot-kernel-panic.292704
3. No Graphics: https://www.tonymacx86.com/threads/catalina-uhd-630-integrated-display-black-screen.292745

Attached EFI folder: Going to Attach the Folder ASAP

 

[cwunder]

Main Post Update

• Attached EFI.zip
• Attached IOREG
• Unclear questions:
  • Sometimes when I boot there's no Backlight/Black Screen issue
    • But for the first 1-2 minutes, the computer is very unresponsive and then it gets super responsive with full Hardware Acceleration
      • Tested 4K videos and GPUBench
  • If I use the only Desktop Framebuffer that isn't Headless from Hackintool there are no graphics at all
    • Even if I set the only DP port to LVDS
  • Somehow my GPU is a Desktop one but using Mobile connections, and I need somehow add a WhateverGreen patch (On Clover Devices) that supports that. But I'm not sure
    • Is there any other way to get the proper platform-id and this kind of data?
      • Like from the Windows Device Manager? Or from the IOREG?
• The computer still freezes randomly from after 15-30 minutes of usage. I actually don't know if it's a fixed amount of time, I can test.
  • Could that be related to PowerManagement (The Power Management seems pretty good actually.)
  • Could it be a faulty ACPI patch?

 

[cwunder]

Thinking about the situation

• My Setup looks a lot like a real iMac setup.
  • Integrated Display with Desktop iGPU.
  • So then, is there any platform-id/framebuffer that could match more this "approach"
    • I didn't see on Hackintool any option on "Patch" for something iMac alike.
      • Only Mac Mini, MacBook Pro, and other mobile and headless (Desktop) variants.
    • How could then I patch this?
      • Should then I leave it empty at all (PciRoot/Pci(0x2,0x0)) should be empty then? Or not existing at all?
      • Should then it follow the SMBIOS?
        • But there's no iMac using UHD 630.
  • There's also no possibility of using discrete graphics since it's an AIO (All-in-one) so there's no room left at all for the eGPU/dGPU.

 

[cwunder]

Progress Update

• The computer is not freezing anymore!
  • Changed SMBIOS to 19,2
  • Added Patches on "Kext Patches" for IHCI0
  • Changed to FakeSMC instead of VirtualSMC that was giving problems with EmuVariables.efi
• Improved Display Color Profile
  • Used Hackintool for patching as Internal Display
  • Added iMac icon
  • Added iMac Retina Cinema Display 16:9 settings

What still needs to be fixed

• Bluetooth & Wi-Fi
  • Ordered BCM94360NG Wireless Card
    • 100% MacOS compatible Plug-n-Play
• During the boot process when the progress bar reaches the middle the backlight goes off and then display turns black for 3-7 minutes.
  • After that display goes on and works as intended
  • No clue why this is happening yet.

PS: Going to upload EFI.zip ASAP for backup purpose and sharing purpose.
PS2: If anyone is interested in helping with the Graphics matter, it would be amazing.

 

[cwunder]

Progress Update

• Does it look like it's still freezing if I'm not doing anything for a while? This is super weird.
  • Still investigating it.