[Guide] Patching DSDT/SSDT for LAPTOP backlight control

[itech]

I tried to apply this patch to my DSDT unsuccessfuly,

#Edit methods _Q80 and _Q81 to interface with PS2K
into method label [B]_Q81[/B] replace_content
begin
// Brightness Down\n
Notify ([B]PS2K[/B], 0x20)\n
end;

into method label [B]_Q80[/B] replace_content
begin
// Brightness Up\n
Notify ([B]PS2K[/B], 0x10)\n
end

The apply button is MaciASL is Greyed out, Same result for the "Remove Debugging code" patch. I am using Rehabman's fork of maciASL RM-1.31 (252.3)

 

[RehabMan]

I tried to apply this patch to my DSDT unsuccessfuly,

#Edit methods _Q80 and _Q81 to interface with PS2K
into method label [B]_Q81[/B] replace_content
begin
// Brightness Down\n
Notify ([B]PS2K[/B], 0x20)\n
end;

into method label [B]_Q80[/B] replace_content
begin
// Brightness Up\n
Notify ([B]PS2K[/B], 0x10)\n
end

The apply button is MaciASL is Greyed out, Same result for the "Remove Debugging code" patch. I am using Rehabman's fork of maciASL RM-1.31 (252.3)

Your patch is incorrect. Why do you have forum markup codes like those for bold face embedded in it?

 

[itech]

Your patch is incorrect. Why do you have forum markup codes like those for bold face embedded in it?

Thank you very much Rehabman, You are AWESOME!!

 

[Rdsdsi]

I installed the ACPIDebug kext to /s/l/e and patched the dsdt.
but there is no output in system.log in console.

 

[RehabMan]

I installed the ACPIDebug kext to /s/l/e and patched the dsdt.
but there is no output in system.log in console.

Your ioreg shows High Sierra installed.
system.log is not used for kernel logs since Sierra.
Read here for details:
https://www.tonymacx86.com/threads/readme-common-problems-in-10-13-high-sierra.233582/

 

[Rdsdsi]

Your ioreg shows High Sierra installed.
system.log is not used for kernel logs since Sierra.
Read here for details:
https://www.tonymacx86.com/threads/readme-common-problems-in-10-13-high-sierra.233582/

I guess I should read the readme more throughly.
As always thanks for the help @RehabMan

 

[tosin]

Your ioreg shows High Sierra installed.
system.log is not used for kernel logs since Sierra.
Read here for details:
https://www.tonymacx86.com/threads/readme-common-problems-in-10-13-high-sierra.233582/

Thanks @RehabMan my backlight is working. The applebacklight injector kext was installed but will not update kextcache, Just deleted the fakesmsc and replace it with another one.
Thank you once more

 

[deeveedee]

@RehabMan - I have Sierra working reasonably well on my Thinkpad T61. I was hoping to get the SysPrefs->Display brightness slider working with Sierra and my Nvidia Quadro NVS 140m. As I'm reading more of your responses to others, I'm beginning to suspect that I should be happy that my brightness works with Bergdesign's app and no other kexts/patches. Should I expect to get the native SysPrefs->Display slider working or just use Bergdesign's app with Sierra?

• Clover (Legacy) 4439
• OSX Sierra 10.12.6

 

[RehabMan]

@RehabMan - I have Sierra working reasonably well on my Thinkpad T61. I was hoping to get the SysPrefs->Display brightness slider working with Sierra and my Nvidia Quadro NVS 140m. As I'm reading more of your responses to others, I'm beginning to suspect that I should be happy that my brightness works with Bergdesign's app and no other kexts/patches. Should I expect to get the native SysPrefs->Display slider working or just use Bergdesign's app with Sierra?

• Clover (Legacy) 4439
• OSX Sierra 10.12.6

You would need to do the appropriate research/reverse engineering on how to enable native brightness controls with Nvidia.

 

[Vipzerohero]

thank for your help but can I change F14, F15 to Fn+Down and Fn+Up for decrease and increase back light?