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[Guide] Laptop backlight control using AppleBacklightFixup.kext

nysander said:
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
Click to expand...

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

please see attached screenshots
 

Attachments

  • lcd.jpg
    lcd.jpg
    176.7 KB · Views: 92
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?
 
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?
 

Attachments

  • debug_23886.zip
    5 MB · Views: 85
AppleBaclightInjector.kext worked in clover kexts， ioreg has shown matched F14XXXX

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

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

but the maximum brightness is 20% of windows

Here is the new problem reporting.
 

Attachments

  • Problem Reporting.zip
    3.3 MB · Views: 79
Last edited:
nysander said:
I see no adnotations about eDP on W7 Device Manager and on Device Details tab.

please see attached screenshots
Click to expand...

You need to investigate in the Intel graphics taskbar applet.
 
nysander said:
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?
Click to expand...

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

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

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

but the maximum brightness is 20% of windows

Here is the new problem reporting.
Click to expand...

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/
 
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