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[Guide] Laptop backlight control using AppleBacklightFixup.kext

Joined
Nov 24, 2016
Messages
9
Motherboard
Samsung NP530U3B-Clover Legacy
CPU
i3-2367M/HM65
Graphics
HD 3000
Hello. My problem is low range brightness (or fog effect like) in High Sierra 10.13.6 or Sierra 10.12.6. All seems work normal, slider changes brightness level from system prefs, fn keys work too, but display isn't bright like in El Capitan with IntelBacklight.kext.
In El Capitan with IntelBacklight.kext this fog effect was too, I found that in IntelBacklight.kext I have to change PCHL value to 0 instead of -1 to get full brightness range. But in new way PCHL not used
I tried with AppleBacklightFixup and WhateverGreen, same result
Hope we find answer together.
Thanks
 

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Feartech

Moderator
Joined
Aug 3, 2013
Messages
10,371
Motherboard
Asus N752VX-Clover
CPU
i7-6700HQ / HM170
Graphics
HD530 + GTX 950m 1920 x 1080
Mac
iMac
Mobile Phone
Android
Hello. My problem is low range brightness (or fog effect like) in High Sierra 10.13.6 or Sierra 10.12.6. All seems work normal, slider changes brightness level from system prefs, fn keys work too, but display isn't bright like in El Capitan with IntelBacklight.kext.
In El Capitan with IntelBacklight.kext this fog effect was too, I found that in IntelBacklight.kext I have to change PCHL value to 0 instead of -1 to get full brightness range. But in new way PCHL not used
I tried with AppleBacklightFixup and WhateverGreen, same result
Hope we find answer together.
Thanks
AppleBacklightFixup.kext is missing from /Library/Extensions
 

Feartech

Moderator
Joined
Aug 3, 2013
Messages
10,371
Motherboard
Asus N752VX-Clover
CPU
i7-6700HQ / HM170
Graphics
HD530 + GTX 950m 1920 x 1080
Mac
iMac
Mobile Phone
Android
Here is debug with AppleBacklightFixup.kext
I just tried boot only with WhateverGreen(as I read it do the same work that AppleBacklightFixup)
yes, thats true, the latest version of Whatevergreen has it, although your problem reporting files mention clover is not installed.....
 
Joined
Aug 2, 2015
Messages
123
Motherboard
Z97X-UD3H-BK
CPU
i7-4790k
Graphics
AMD Radeon R9 270X
Mobile Phone
Android
Hello,
I got a problem with this guide.
I manage to get the slider on the settings but the brightness don't change and if I put the value of the slider under ~20% my screen goes black and nothing I can't do nothing anymore, i must reboot.

I'm on Mojave.
Thanks in advance.
One obvious problem I can see is your current config.plist has the wrong SMBIOS. You should probably be using MacBookPro14,3 and definitely not iMac18,1 so change that and see what happens. Also you don't actually need AppleBacklightFixup.kext and can remove it since WhateverGreen.kext does the same thing.
 
Joined
Nov 24, 2016
Messages
9
Motherboard
Samsung NP530U3B-Clover Legacy
CPU
i3-2367M/HM65
Graphics
HD 3000
yes, thats true, the latest version of Whatevergreen has it, although your problem reporting files mention clover is not installed.....
I use Clover from usb to test. I attached my clover in first post(EFI.zip)
 

Feartech

Moderator
Joined
Aug 3, 2013
Messages
10,371
Motherboard
Asus N752VX-Clover
CPU
i7-6700HQ / HM170
Graphics
HD530 + GTX 950m 1920 x 1080
Mac
iMac
Mobile Phone
Android
Joined
Nov 24, 2016
Messages
9
Motherboard
Samsung NP530U3B-Clover Legacy
CPU
i3-2367M/HM65
Graphics
HD 3000
best to install clover to your hard drive
I know. I am tested with clover on internal HD, same result.
I think I have to make some changes in SSDT-PNLF like I made it with PCHL value for IntelBacklight.kext. Tried to change values in SSDT-PNLF and have no luck
 
Joined
Nov 24, 2016
Messages
9
Motherboard
Samsung NP530U3B-Clover Legacy
CPU
i3-2367M/HM65
Graphics
HD 3000
Or maybe I need to modify my display EDID. Clover can't recognise my display EDID at boot, so I use custom EDID
 
Joined
Aug 17, 2018
Messages
2
Motherboard
DELL Precision M4700
CPU
i7-3740QM/QM77
Graphics
HD4000 / Quadro K2000M
Mac
MacBook Pro
Mobile Phone
iOS
Depending on my 10.14.4 installation are clean install or editing on current installation, SSDT-PNLF work with few EDID patch. With default LGD0215 EDID on a clean install, brightness control show and work perfectly. After patch to inject 9C7C, A030 and various Apple MacBook Color LCD PID still working. But when all my works on patching is done, and i want to re-install a fresh installation with all new config and patches, brightness control slider is gone. Changing SMBIOS model affect this too. As my build, i7 3740QM using HD 4000 Graphics, the tips on Clover Configurator and Hackintools recommending MacBookPro 9,1 and MacBookPro 9,2 SMBIOS but both SMBIOS give me AGPM P-State fault. Currently, i am using MacBookPro10,1 config but with a clean install of 10.14.4 / A030 Display SSDT-PLNF does'nt work at all, my fix are changing to 9C7C Display then switch back to A030. May be on specific LCD model cause this problem, i'm now going to test the ambient light sensor to see what's different with that.
 
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