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[Guide] Laptop backlight control using AppleBacklightFixup.kext

Joined
Jun 20, 2013
Messages
79
Motherboard
Gigabyte X299X Designare-10G
CPU
i9-10940X
Graphics
Radeon VII 16GB
Hiya, I have some trouble while using the latest Lilu + Whatevergreen + AddPNLF in Clover. The maximum brightness is very low (say 50% or less of what it should be). The slider does work, but only to darker.

When I use the PNLF.ssdt instead of AddPFNL in Clover, there is no brightness slider. When I use IntelBacklightFixup.kext (with or without PNLF.ssdt) separately it doesn't work either. I now assume IBF.kext is ncluded in Whatevergreen anyway.

I tried in Clover:
- enable_cfl_backlight_fix (boot-arg)
- Graphics/InjectEDID + ProductID: 9c7c
- SetIntelBacklight + SetIntelMaxBacklight (no value, not needed according to Whatevergreen Wiki)

I tried looking into using SSDT-RMCF but honestly I don't know where to go with it.

Hopefully you can help me find a fix!
 

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Joined
Dec 18, 2019
Messages
24
Motherboard
Acer Aspire A715-74G-78KF
CPU
i7-9750H
Graphics
UHD 630
Mac
MacBook Pro
problem with coofeelike processors has been solved Feartech
@Feartech ,

Please can you elaborate on what you mean with problem solved on coffeecake ?

If you do have a way to enable "Laptop backlight control using AppleBacklightFixup.kext" kindly share with us.

Regards
 

Feartech

Moderator
Joined
Aug 3, 2013
Messages
13,866
Motherboard
Asus N752VX-OpenCore
CPU
i7-6700HQ / HM170
Graphics
HD 530 1920 x 1080
Mac
iMac
Mobile Phone
iOS
@Feartech ,

Please can you elaborate on what you mean with problem solved on coffeecake ?

If you do have a way to enable "Laptop backlight control using AppleBacklightFixup.kext" kindly share with us.

Regards
maybe ask @Nokrato ? as it wasn't me that solved it
 
Joined
Dec 11, 2019
Messages
4
Motherboard
Acer C720-3404 - Clover
CPU
i3-4005U
Graphics
HD 4400
Anyone able to get brightness to work under Catalina? It was working fine for me under High Sierra. I did a clean install of Catalina and no more brightness slider bar. Not sure if this hack works under the new macOS.
 
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