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[Guide] Laptop backlight control using AppleBacklightFixup.kext

RehabMan said:
You did not disable the GPU.

But you did manage to spoof the PCI bridge that is connecting your DGPU such that it is not seen as a PCI bridge anymore. That was done because your SSDT-DiscreteSpoof (you named it SSDT-2.am) is wrong. _SB.PCI0.RP01 should have been _SB.PCI0.RP01.PXSX.

The GPU is still active and using power.

Correctly disabling the DGPU is covered here:
https://www.tonymacx86.com/threads/guide-disabling-discrete-graphics-in-dual-gpu-laptops.163772/
Click to expand...

Ah thanks for the confirmation, now I really only need to have a motivation to do the patching.
Anyway forgot to tell that it works now, thanks. But when I tried to go lower the brightness, at the lowest point, it became 100% dark like the LCD is turned off. Is there any workaround for this?
 
vonian said:
But when I tried to go lower the brightness, at the lowest point, it became 100% dark like the LCD is turned off. Is there any workaround for this?
Click to expand...

It is correct behavior as per Apple design.
You would find the same on a real Mac.
 
RehabMan said:
It is correct behavior as per Apple design.
You would find the same on a real Mac.
Click to expand...

Ahh, is that so.
Okay, thanks for the information. Sorry for taking your time.
 
I think i followed the guide correctly, remove PNLF, remove IntelBacklight, install AppleBacklightInjector, copy SSDT, patch config.plist. but after reboot i lose brightness control and slider, so i tried to install "brightness slider" from app store to check if brightness works. it works but the brightness range is very short. am i missing something ?
 

Attachments

  • Brightness problem.zip
    3.2 MB · Views: 68
When I try to rebuild kext cache I get this error, how to fix it?
Kext with invalid signatured (-67062) allowed: <OSKext 0x7fb93ecd7100 [0x7fffbaf41830]> { URL = "AppleBacklightInjector.kext/ -- file:///Library/Extensions/", ID = "org.rehabman.injector.AppleBacklightInjector" }
 

Attachments

  • EFI.zip
    17.3 MB · Views: 85
firmanslash said:
I think i followed the guide correctly, remove PNLF, remove IntelBacklight, install AppleBacklightInjector, copy SSDT, patch config.plist. but after reboot i lose brightness control and slider, so i tried to install "brightness slider" from app store to check if brightness works. it works but the brightness range is very short. am i missing something ?
Click to expand...

As per guide, SSDT-PNLF.aml requires GFX0->IGPU rename. The ioreg shows GFX0, not IGPU.
Read post #1 carefully.
Your ACPI setup is wrong.
Read here:
https://www.tonymacx86.com/threads/guide-patching-laptop-dsdt-ssdts.152573/
 
YusufRahadika said:
When I try to rebuild kext cache I get this error, how to fix it?
Kext with invalid signatured (-67062) allowed: <OSKext 0x7fb93ecd7100 [0x7fffbaf41830]> { URL = "AppleBacklightInjector.kext/ -- file:///Library/Extensions/", ID = "org.rehabman.injector.AppleBacklightInjector" }
Click to expand...

It is not an error.
 
firmanslash said:
strange, i've already rename all GFX0 to IGPU, but the ioreg always show GFX0. i also checked my DSDT and SSDT-6. all GFX0 is renamed to IGPU.

btw is there any clue for my ACPI setup ? i followed every step in your guide there.
Click to expand...

You did not follow my ACPI patching guide.
Currently, you have these files in ACPI/patched:
SSDT-6.aml
DSDT.aml
SSDT-PNLF.aml

In order for SSDT-6.aml to replace the native SSDT-6.aml with this setup, you must use my fork of Clover and set config.plist/ACPI/AutoMerge=true.

You don't have AutoMerge in your config.plist.
And you're not using my version of Clover.

Without my version of Clover (and AutoMerge), you would need to set DropOem=true, use SortedOrder to specify SSDT load order, and have the following files in ACPI/patched:
DSDT.aml
SSDT-0.aml
SSDT-1.aml
SSDT-2.aml
SSDT-6.aml
SSDT-PNLF.aml

Also, SortedOrder should specify the SSDTs in that order.

Note: You also need SSDT-PluginType1.aml to implement CPU PM. Or with my version of Clover, you can set config.plist/ACPI/SSDT/Generate/PluginType=true.

Read carefully:
https://www.tonymacx86.com/threads/guide-patching-laptop-dsdt-ssdts.152573/
 
RehabMan said:
It is not an error.
Click to expand...
But I can't get brightness control from keyboard without or with Fn Brightness ACPI guide. I have tried Fn + any keys but no brightness changes. My syslog can't record my input in my laptop (Fn + left / Fn + right) even after patches by Debug & EC instruments + ACPIDebug in DSDT so I revert my ACPI Fn Brightness changes.
 
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