[Guide] Laptop backlight control using AppleBacklightFixup.kext

[valeryimm]

Thank you. Will follow your recommendations.

 

[motdoiphieuluu]

You cannot expect to use a desktop ig-platform-id for a laptop. Your ioreg proves it... 0x0d220003 is desktop.
See guide for correct plists:
https://www.tonymacx86.com/threads/guide-booting-the-os-x-installer-on-laptops-with-clover.148093/

It is also possible you have SSDT-IGPU.aml misconfigured (you really should not be using it anyway,... best to use config.plist for graphics injection). But if you insist on SSDT-IGPU, make sure it is configured correctly with SSDT-RMCF.

Also,
Your kextcache output proves kexts are not installed correctly.
All kexts you need must be installed to the system volume.
Read post #2 of the Clover guide for details:
https://www.tonymacx86.com/threads/guide-booting-the-os-x-installer-on-laptops-with-clover.148093/

Thank you very much RehabMan! The backlight control work perfectly now! You helped me understand more about the hotpatch and clover configuration. Very interesting!

 

[RehabMan]

Thank you very much RehabMan! The backlight control work perfectly now! You helped me understand more about the hotpatch and clover configuration. Very interesting!

Good to hear.

 

[famousginni]

Your ACPI configuration is wrong.
See guide for good starter plists and recommended version of Clover:
https://www.tonymacx86.com/threads/guide-booting-the-os-x-installer-on-laptops-with-clover.148093/

Then read applicable ACPI patching guides:
https://www.tonymacx86.com/threads/guide-patching-laptop-dsdt-ssdts.152573/
https://www.tonymacx86.com/threads/guide-disabling-discrete-graphics-in-dual-gpu-laptops.163772/

I'm a bit confused as to what is wrong in the ACPI. Would you be able to elaborate a bit further. I read the guide and was still unsure about what is wrong with my ACPI.

Thanks, and I apologize for not understanding

 

[RehabMan]

I'm a bit confused as to what is wrong in the ACPI. Would you be able to elaborate a bit further. I read the guide and was still unsure about what is wrong with my ACPI.

Thanks, and I apologize for not understanding

Should have:
- config.plist/ACPI/AutoMerge=true (no need for DropOem=true)
- patched SSDT names in ACPI/patched should match those in ACPI/origin
- renames should be done only with config.plist/ACPI/DSDT/Patches
- do not place SSDTs that require no patches in ACPI/patched
- do not apply (manually) patches (to SSDTs or DSDT) already done in config.plist/ACPI/DSDT/Patches

 

[k4r7hy]

I don't understand what you mean by
AppleBacklight patch in config.plist/KernelAndKextPatches/KextsToPatch

 

[RehabMan]

I don't understand what you mean by
AppleBacklight patch in config.plist/KernelAndKextPatches/KextsToPatch

It is covered in post #1.
Read it carefully.

 

[userpakal]

Great guide!

Backlight control now works from SysPrefs->Displays on macOS Mojave.

There is one problem left to fix though: if I put the brightness slider on 100%, the screen still has a very low brightness (also, putting the slider at 20% results in a black screen instead of a low brightness screen).

Any idea on how to calibrate this correctly?

 

[RehabMan]

Great guide!

Backlight control now works from SysPrefs->Displays on macOS Mojave.

There is one problem left to fix though: if I put the brightness slider on 100%, the screen still has a very low brightness (also, putting the slider at 20% results in a black screen instead of a low brightness screen).

Any idea on how to calibrate this correctly?

You need to use SSDT-PNLF.dsl from the beta branch.
And AppleBacklightInjector.kext from the Probook beta_weg branch.

And just made some changes that allow it to detect CFL ids automatically and pick the larger LMAX=0xff7b.

With everything setup correctly, you should have in ioreg, PNLF._UID=19, F19Txxxx backlight profile data.

 

[userpakal]

You need to use SSDT-PNLF.dsl from the beta branch.
And AppleBacklightInjector.kext from the Probook beta_weg branch.

And just made some changes that allow it to detect CFL ids automatically and pick the larger LMAX=0xff7b.

With everything setup correctly, you should have in ioreg, PNLF._UID=19, F19Txxxx backlight profile data.

You are a hero, it works perfectly now.