E7450 - Brightness keys not working with karbiner-elements

[acquarius.13]

I have the same issue on the same e7450. Following the above steps, I attach also my ioreg file and I ask you an hand too

 

[roniez]

I just rebooted once more, before i rebuilt the kextcache (even removed battery and removed from powersource) 

and just powered up, now the brightness keys works as expected but i do have to press the FN key for it to be used. which is great!

[acquarius.13]

I've tried to inject the AppleBacklightInjector.kext also to /S/L/E but no way. My system profiler says that the AppleBacklightInjector.kext is not loaded, but I don't know why. I can try to perform a hard shutdown with battery removal and see what happens..

[acquarius.13]

As I supposed, this did not work for me, possibly because the AppleBacklightInjector.kext is still not loaded in system profiler

[Jake Lo]

To fix it for E7450 with HD5500 only, follow this

- Delete IntelBacklight.kext from /EFI/Clover/Kexts/Other or anywhere else that has it

- Add to /L/E - AppleBacklightInjector.kext

- Add SSDT-PNLF.aml and DSDT.aml -> /EFI/Clover/ACPI/Patched

 

Repair permission and rebuild cache

      sudo chmod -Rf 755 /L*/E*

      sudo chown -Rf 0:0 /L*/E*

      sudo touch -f /L*/E*

      sudo chmod -Rf 755 /S*/L*/E*

      sudo chown -Rf 0:0 /S*/L*/E*

      sudo touch -f /S*/L*/E*

      sudo kextcache -Boot -U /

 

E7450_HD5500_Only.zip

[acquarius.13]

I will retry to redo these steps that I already performed following this topic. I will redo using the attached file because I already did all the above steps. But thanls in any case Jake!

[acquarius.13]

One question: I performed SSDT generation through the ssdPrgenbeta.sh (or whatever it si named..I don't renember): should I replace my own ssdt.aml with the one you attached in the zip? Thanks

[Jake Lo]

I didn't include SSDT.aml but SSDT-PNLF.aml which is for brightness Control. If you want to regenerate a new one base on updated 10.12.4, then ok but not necessary.

 

[acquarius.13]

I've just try to do all the steps..unfortunately I have no fix to this problem. 

Any other idea?

[Jake Lo]

upload IOReg and output of command lines after running the permission fix and rebuild cache