[Guide] Laptop backlight control using AppleBacklightFixup.kext

[Feartech]

config.plist changed with Detect and SSDT-PNLF.aml added in ACPI/Patched. I patched the DSDT with the recommended patches from the laptop section. Nothing changes. I cannot boot without injecting Nvidia in config.plist. I cannot see the card in system info but I guess it is running. I have not tried to disable it. Best regards.

what patches did you do in your DSDT?

 

[henkrik92]

what patches did you do in your DSDT?

"Rename _DSM methods to XDSM"
"IRQ Fix"
"SMBUS Fix"
"OS Check Fix (Windows 8)"
"Add IMEI"
"RTC Fix"
"Fix _WAK Arg0 v2"
"USB3 _PRW 0x6D (instant wake)"

 

[henkrik92]

Seems like nothing I do makes a difference.

-Completely made sure I had no brightness fixes.
-Removed everything from ACPI/patched folder excluding SSDT-PNLF.aml.
-Tried to inject EDID from config.plist/Graphics. I use rehabmans clover 4701 with the hd 630 config.plist
-Tried to remove Whatevergreen.kext incase as I've read that it already includes the kext Im trying to use.

Could it be that my display is not compatible? Is it maybe necessary to disable the dGPU (GTX 1060 6gb) to make brightness work? I have the slider and hotkeys are working as well (although not on the correct key).

The only thing I do not understand well is the PWM MAX section. Could a correct PWM value make it work or is it more a matter of brightness levels?

 

[Volsmd99]

Unable to get any backlight controls or the slider to appear. Installed High Sierra 10.13.6 on Dell Inspiron n5010 with Intel HD Arrandale graphics.

Installed applebacklightfixup.kext to ~/Library/Extensions
Installed SSDT-PNLF.aml to ACPI/Patched folder.
Renamed GFX0 to IGPU

 

[Feartech]

Unable to get any backlight controls or the slider to appear. Installed High Sierra 10.13.6 on Dell Inspiron n5010 with Intel HD Arrandale graphics.

Installed applebacklightfixup.kext to ~/Library/Extensions
Installed SSDT-PNLF.aml to ACPI/Patched folder.
Renamed GFX0 to IGPU

FakeSMC.kext missing from /L/E

also no GFX0 to IGPU rename in config.plist

 

[Volsmd99]

FakeSMC.kext missing from /L/E

also no GFX0 to IGPU rename in config.plist

Thank you for your assistance. I have added fakesmc.kext. However, I cannot find where GFX0 has not been renamed. Would you be able to provide a screenshot of the code you are referring to?

 

[b1t0y]

@RehabMan
Will this method work on lenovo u410 to get brightness slider working? I have tried it but has not been successful. I remember that lenovo u410/310 has a problem since sierra or high sierra but cant remember exactly. Is there any other work around to get the brightness working? Thanks in advance.

 

[dracau18]

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.

 

[dmitrymstr]

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

 

[Feartech]

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