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[Guide] Laptop backlight control using AppleBacklightFixup.kext

Feartech

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Asus N752VX-OpenCore
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Done, no change
before your next post:
please read the faq for proper hardware profile setup:

please use a config.plist from the laptop guide

the one you have is awful, best not to let clover configurator create one for you

also acpi/patched is not a dumping ground, remove those bak files

what patches did you do in your DSDT.aml ?
 
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Lenovo IdeaPad u410-Clover
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Hi RehabMan! Huge thanks for your work!

I cannot get backlight control with the guide. I get the brightness slider in settings, but it changes nothing. I can change the brightness with buttons, but it happens slowly and without any indication of brightness change in the OS.

I also tried using ACPIBacklight.kext and Genericbrightness.kext - no luck. Now cleared them all from /L/E and done minimal SSDT patching - only for native PM and USB injection. Can you check what's wrong please?
 

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Lenovo IdeaPad 700-15ISK
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Rehabman, hello!
Thank you for your continued efforts.
I read your guide, but the backlight still doesn't work. I don't know where the reason is, So ask for help and hope to get your help.. The backlight control can still be used in macos13.6, but at 10.14.5 brightness control. Can't work anymore.
Try to bring the latest
- SSDT-PNLF.aml in ACPI / patched
- Installed to /L/E AppleBacklightFixup.kext
But brightness control still doesn't work
 

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Joined
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hello rehab man, thx a lot for this guide.
also i read and committed all steps carefully unfortunately no backlight control sliders.

can you help me figuring out, what is wrong?
thx
 

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hi rehabman, I had copied SSDT-PNLF.aml in ACPI/patched, and AppleBacklightFixup.kext installed to /L/E.
Brightness Slidebar showed, but it has no effect when sliding that bar.
the macOS version is 10.12.6
 

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Feartech

Moderator
Joined
Aug 3, 2013
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Motherboard
Asus N752VX-OpenCore
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i7-6700HQ / HM170
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HD 530 1920 x 1080
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iMac
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iOS
hi rehabman, I had copied SSDT-PNLF.aml in ACPI/patched, and AppleBacklightFixup.kext installed to /L/E.
Brightness Slidebar showed, but it has no effect when sliding that bar.
the macOS version is 10.12.6
you seem to have forgotten to install FakeSMC.kext to /Library/Extensions
How and where to install kexts:
 
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you seem to have forgotten to install FakeSMC.kext to /Library/Extensions
How and where to install kexts:
I had tried. But still no effect, so I removed it again.
 

Feartech

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Does this guide work for a laptop running Mojave in conjunction with an nVidia GK104 Kepler card (Quadro K4100M) and the nVidia Optimus turned OFF so that only the dGPU is being used?

The GPU is detected in my system profile using the included apple nvidia driver within Mojave, but I can't seem to get backlight control to work (intel only?).

EDIT: I should mention that it was working in 10.13.6 High Sierra and I had Optimus turned off as well as the keyboard fn keys working to adjust the brightness, however it was using the nVidia webdrivers. but those are not compatible with 10.14.x.

I don't seem to see the brightness slider anymore, so perhaps once I get that working it may start to function again. Has anyone with a K4100M or similar GTX type GK104 card managed to get the brightness slider back?
 
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