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[Guide] Laptop backlight control using AppleBacklightFixup.kext

RehabMan

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Joined
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So you're telling me I'm gonna live with full brightness all my life...

You should try ACPIBacklight.kext + appropriate ACPI patch ("Brightness Fix (ACPI 100)") + Brightness by bergdesign.
 

RehabMan

Moderator
Joined
May 3, 2012
Messages
188,061
Motherboard
Intel DH67BL
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  1. iOS
I mean I hope your suggestion would work so I would not have to go back to AppleBacklight.kext, which is still a problem for me right?

AppleBacklight.kext requires your hardware to use the IGPU PWM registers. If it does not, you have my other suggestion.
 
Joined
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GB Z77P-D3
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AppleBacklight.kext requires your hardware to use the IGPU PWM registers. If it does not, you have my other suggestion.
I tried your other suggestion, still negative sir. Idk if I had done anything wrong.
This is what I've tried so far:
1. using ACPIBacklight.kext alone with DSDT patched with Brightness fix (APCI 100) (AppleBacklightFixup.kext and SSDT-PNLF removed)
2. using both

in either case I don't have my brightness at max, nor the brightness slider in syspreps.

Do you suggest me having done anything wrong sir? You need my debug files in any cases? I'm back to the start ATM with my brightness at max.
 
Joined
Dec 18, 2018
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ASUSTEK COMPUTER INC. N751JX 1.0
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Mobile QuadCore Intel Core i7 - 4720HQ 3400 MHz (34x100) Haswell
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Hi, for 4 days I have been trying to solve the problem with the no control of the screen brightness, I have done all the steps of the manual in forum but control not yet working :(. Is anyone able to point out a problem with the attachments provided? I'm sorry for my English.
 

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Joined
Nov 27, 2018
Messages
53
Motherboard
Lenovo X1 Carbon G6 - OC
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i7-8550U
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UHD 620, 2560x1440
Hi

I have implemented successfully backlight control using AppleBacklightFixup.kext and SSDT-PNLF.aml as per this guide.

According to the changelog in WhateverGreen (from version 1.2.5 onwards) the AppleBacklightFixup code has been added to WhateverGreen directly, so should we upgrate to latest WhateverGreen and delete AppleBacklightFixup.kext? Any other changes needed?

Thanks
 
Last edited:
Joined
Nov 27, 2018
Messages
53
Motherboard
Lenovo X1 Carbon G6 - OC
CPU
i7-8550U
Graphics
UHD 620, 2560x1440
so should we upgrate to latest WhateverGreen and delete AppleBacklightFixup.kext?

I did that and all seems to be working OK. Backlight patch still works just using WhateverGreen.
 
Joined
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HP 250 G5 (81EF) Clover UEFI
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i3 5005u
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Hi

I have implemented successfully backlight control using AppleBacklightFixup.kext and SSDT-PNLF.aml as per this guide.

According to the changelog in WhateverGreen (from version 1.2.5 onwards) the AppleBacklightFixup code has been added to WhateverGreen directly, so should we upgrate to latest WhateverGreen and delete AppleBacklightFixup.kext? Any other changes needed?

Thanks
I just removed AppleBacklightFixup.kext and I can confirm that WhateverGreen.kext has the backlight patches built into it.
 
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