[Guide] Patching DSDT/SSDT for LAPTOP backlight control

[RehabMan]

Here is the problem report files

You need to patch the BRT6 method.
Read post #1.

 

[aldoalfalus]

You need to patch the BRT6 method.
Read post #1.

BRT6 has been patched to dsdt, and also acpidebug has been loaded. But still no result in console when i'm pressing the fn+up / down arrow.

 

[RehabMan]

BRT6 has been patched to dsdt, and also acpidebug has been loaded. But still no result in console when i'm pressing the fn+up / down arrow.

Read here for how to collect kernel logs:
https://www.tonymacx86.com/threads/readme-common-problems-in-10-13-high-sierra.233582/

Note:
The reason your brightness keys are not working is due to incorrect _OSI patching. You have unpatched _OSI calls in the OSID method (look closely at your DSDT code).

Best to use OSID->XSID, _OSI->XOSI, and SSDT-XOSI.aml. Read my ACPI hotpatch guide for details.

 

[aldoalfalus]

Read here for how to collect kernel logs:
https://www.tonymacx86.com/threads/readme-common-problems-in-10-13-high-sierra.233582/

Note:
The reason your brightness keys are not working is due to incorrect _OSI patching. You have unpatched _OSI calls in the OSID method (look closely at your DSDT code).

Best to use OSID->XSID, _OSI->XOSI, and SSDT-XOSI.aml. Read my ACPI hotpatch guide for details.

Something like this ? How to determine that correct method about down / up arrow ? It's showing many 'sending key' log

 

[RehabMan]

Something like this ? How to determine that correct method about down / up arrow ? It's showing many 'sending key' log

You already have the correct patches for the BRT6 method.
But your _OSI handling is wrong, as previously mentioned.

 

[aldoalfalus]

You already have the correct patches for the BRT6 method.
But your _OSI handling is wrong, as previously mentioned.

Thanks btw now fn down / up worked. But the brightness value doesn't change as my question https://www.tonymacx86.com/threads/...klightfixup-kext.218222/page-177#post-1863932

 

[RehabMan]

Thanks btw now fn down / up worked. But the brightness value doesn't change as my question https://www.tonymacx86.com/threads/...klightfixup-kext.218222/page-177#post-1863932
View attachment 369697

I see no issue in that image. You will need to clarify your problem.

 

[aldoalfalus]

I see no issue in that image. You will need to clarify your problem.

This file will tell you my problem, at the first boot the brightness level and also slider isn't working. But strangely when i do the sleep and then wake again, the brighntess level are working also the slider. So what is the main problem ?

 

[RehabMan]

This file will tell you my problem, at the first boot the brightness level and also slider isn't working. But strangely when i do the sleep and then wake again, the brighntess level are working also the slider. So what is the main problem ?

Did you enable CSM/legacy boot in BIOS?

 

[aldoalfalus]

Did you enable CSM/legacy boot in BIOS?

No, there is no option about CSM on my bios