[Guide] Laptop backlight control using AppleBacklightFixup.kext

[mdub]

latest lilu/whatevergreen breaks this. how do I get it working again? are there devices/properties tags I need to input into config.plist? thanks

 

[RehabMan]

latest lilu/whatevergreen breaks this. how do I get it working again? are there devices/properties tags I need to input into config.plist? thanks

No "Problem Reporting" files attached.
Read FAQ, "Problem Reporting" again. Carefully. Attach all requested files/output.
https://www.tonymacx86.com/threads/faq-read-first-laptop-frequent-questions.164990/
Use the gen_debug.sh tool mentioned in the FAQ, that way it is less likely you'll omit something.

 

[sythanh14]

I have the backlight slider in SysPreps/Display but it is not functioning.
Brightness is working at max. I need your help Rehabman. I have the files you need included here.
Thank you in advance.

 

[RehabMan]

I have the backlight slider in SysPreps/Display but it is not functioning.
Brightness is working at max. I need your help Rehabman. I have the files you need included here.
Thank you in advance.

It is likely your system does not use the IGPU PWM for backlight control, therefore it is not compatible with Apple's AppleBacklight.kext.

 

[sythanh14]

It is likely your system does not use the IGPU PWM for backlight control, therefore it is not compatible with Apple's AppleBacklight.kext.

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

 

[RehabMan]

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.

 

[sythanh14]

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

Bravo Zulu, Imma give it a shot then. Hopefully I won't have to go back to AppleBacklight (full is better than medium anyway Ikr?)

 

[RehabMan]

Hopefully I won't have to go back to AppleBacklight (full is better than medium anyway Ikr?)

No idea what you mean by that.

 

[sythanh14]

No idea what you mean by that.

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?

 

[RehabMan]

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.