That's the only kext in development I believe for v8, however no update had been made ever since.
You'll just have to wait for update by Dr. Hurt or anyone with skills to fix the issue.
You need AppleBacklightInjector.kext in /L/E, won't work in Clover kexts, so move it back
Replace Config and DSDT.aml
Repair permission and rebuild cache
7480_audio.zip
I'm not familiar with kext helper, does it fix permission on the whole drive or just /S/L/E?
I recommend running these from terminal:
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 /
Please post KP screenshot
Disable Legacy Option ROMs if you have it enabled
You still have duplicates kexts, look at the kextcache log...
Remove from /S/L/E
AppleBacklightInjector.kext
AppleALC.kext
FakePCIID_Intel_HD_Graphics.kext
FakePCIID.kext
FakePCIID_Broadcom_WiFi.kext
BrcmPatchRAM2.kext
BrcmFirmwareRepo.kext
Remove EAPDFix.kext from /L/E and replace it with CodecCommander.kext for audio
Repair permission and rebuild cache
Are you sure your audio is ALC293 and not ALC256?
Here, replace the Config file and DSDT.aml with the attached
Once booted, do the following:
Remove the following kexts from /L/E
AppleHDA_ALC293.kext
Remove from /S/L/E <- duplicate from /L/E
EAPDFix.kext
AppleBacklightInjector.kext
ACPIBacklight.kext
Add to /S/L/E
VoodooI2CHID.kext & VoodooI2C ( you already got this one)
https://github.com/alexandred/VoodooI2C/releases
Repair permission and rebuild cache
Reboot
7480_Tuóng.zip
Ok, add Lilu.kext & AppleALC.kext to /EFI/Clover/kexts/Other
I see you already have layout-id 13 in your Config file, so try with that.
You could also try 3, 17,18 and 28 to see which works best