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here is my report before patch anything. I have nvdia 850m which is not supported, so I put ssd-DiscreteSpoof.aml to disable it, is this true? another problem. my dsdt and some ssd got error, ex ssdt 1, ssdt 5... so why I needn't patch all of them and only need dsdt.aml and ssd-pnlf.aml?

at the #1426 page 143 https://www.tonymacx86.com/threads/guide-patching-dsdt-ssdt-for-laptop-backlight-control.152659/page-143#post-1734882 you confirm my api wrong. So I was re-patch again from origin after deleted ACPI then F4

here is my patched dsdt and ssd. can u help me check error of this? I didn't apply your recommend patch, I was patch for no error only

here is my rp after patch dsdt. I apply EC method. I pressed F14 and F15 repeatedly at 6:09 and fn+up,down,left,right at 6:10 (fn+left,right is volume down and up) and use terminal: log show --predicate "processID == 0" --start 2018-04-22 --debug >> ~/Documents/kenel.log (kennel.log)

here is my report before patch acpi dsdt

Hix. Can u help me fix this error? Rehabman

I tried it. but I have an problem. I patched dsdt with debug patch (RMD0000) and apply instrument EC Queries. But when I press brightness up or down, it seem no thing in system.log, I try to use console to track my log, it showing "EC _Q8B enter, EC _Q8B exit" repeatedly. when I press brightness...

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

hi. can u help me? this is my log after check speedstep. did it work?

here is my IOReg Clover and patchmatic. Is my laptop working correctly ?

hi. this is my report ab speedsteo. is it working correctly?

wow. it worked. very thank to you but how to use keyboard to change backlight level?

Thank. I put AppleBacklight.kext back. But only my fan spin in fastest mode and cant make it slower. Backlight still not working

i deleted ACPIBacklight.kext and put AppleBacklight.kext back. But it backlight not work, and my fan speed faster only

I followed the guide. 1. removed PNLF in my DSDT and SSDT 2. I change GFX0 from DSDT and SSDT to IGPU 3. install applebacklightinjector.kext by Kext Wizard and deleted AppleBacklight and ACPIbacklight.kext 4. add patch in clover 5. coppy ssdt.pnlf to patched but it seem not worked. can u check...