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ALC 280 Headset/Headphone not working (HP Folio 9480m)

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Nov 11, 2019
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Motherboard
Laptop HP 9480M
CPU
i5-4310u
Graphics
HD 4400
i know there are exception for alc 280 in hp folio 9480m so that the headphone/headset no sound.

"To the kext to ALC280 of @zirkaiva I had to add in: Headphones/MuteGPIO=4 in Layout-ID, to your Headphone work, to be honest this is an exception for most the ALC codec for Laptops works without it in Layout-ID, and this is your case I should have tried the first time, When you said that ALC280_Original worked, least headphones. We have two slightly different scenarios, the first in which HP Elitebook 9480m Folio need Headphones/MuteGPIO=4 in Layout-ID, for your Headphone works and the second where HP Elitebook G2, not must have these values in its Layout-ID so your headset work correctly, RehabMan keep this in mind when updating your repository. "
Source: https://github.com/RehabMan/HP-ProBook-4x30s-DSDT-Patch/blob/master/Resources_ProBook/README.txt

my question is, how to add Headphones/MuteGPIO=4 in Layout-ID?
can you guys help me explain it from scratch?
 
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