[Guide] Laptop backlight control using AppleBacklightFixup.kext

[RehabMan]

Because only on that i can boot to desktop. Default a260006 ends with blank screen (same behavior as when loading ssdt-plnf.aml file) instead of apple logo

No expectation of brightness controls with desktop ig-platform-id.
Probably your display is connected via eDP (check in Windows). macOS/OS X has poor/no support for eDP.

 

[nysander]

I see no adnotations about eDP on W7 Device Manager and on Device Details tab.

please see attached screenshots

 

[nysander]

well I've searched ebay on replacement LCD and they state 30/40 PIN eDP connection. So it is not possible to make brightness work on my laptop?

 

[nysander]

I've tried now to change ig-platform-id to 0x0a260008 and intelgfx-id 0x04168086 and OS boots but only with 7mb of GPU memory. same is when I boot with intelgfx-id 0x04128086

I've found that ig-platform-id to 0x0a260008 is for devices with eDP, DP and Thunderbolt (which my laptop have (DP/TB integrated).

But with such low memory and FHD display size system is unusable.

What can I check more?

 

[kumaradevan_c]

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.

Here I have attached problem reporting files. Thanks for your help!

 

[Sikong]

AppleBaclightInjector.kext worked in clover kexts， ioreg has shown matched F14XXXX

I installed kext to /L/E, and got the same result.

bogon:~ sikong$ nvram backlight-level
backlight-level    %10%07

but the maximum brightness is 20% of windows

Here is the new problem reporting.

 

[RehabMan]

I see no adnotations about eDP on W7 Device Manager and on Device Details tab.

please see attached screenshots

You need to investigate in the Intel graphics taskbar applet.

 

[RehabMan]

I've tried now to change ig-platform-id to 0x0a260008 and intelgfx-id 0x04168086 and OS boots but only with 7mb of GPU memory. same is when I boot with intelgfx-id 0x04128086

I've found that ig-platform-id to 0x0a260008 is for devices with eDP, DP and Thunderbolt (which my laptop have (DP/TB integrated).

But with such low memory and FHD display size system is unusable.

What can I check more?

0xa260008 is not a valid ig-platform-id. You cannot use random numbers.
If 0x0d220003 is working for you, you should probably stick with that. Make sure you're using the correct LMAX value.

 

[RehabMan]

Here I have attached problem reporting files. Thanks for your help!

As per guide, ACPIBacklight.kext must not be installed.

 

[RehabMan]

AppleBaclightInjector.kext worked in clover kexts， ioreg has shown matched F14XXXX

I installed kext to /L/E, and got the same result.

bogon:~ sikong$ nvram backlight-level
backlight-level    %10%07

but the maximum brightness is 20% of windows

Here is the new problem reporting.

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/