> Last modified: Wed May 06 2020 04:52:37 GMT+0000 (Coordinated Universal Time)

# Fixing Backlight

So what this SSDT does is create a PNLF device for macOS to play with, specifically one with a hardware ID of `APP0002`. WhateverGreen will handle the rest of the work

No configuration required for most, just drop the pre-built file into your EFI:

- SSDT-PNLF
  - For most users
- SSDT-PNLFCFL
  - For Coffee Lake and newer

Note: there are some rare cases where the iGPU is called `GPU0` or `VID`in the DSDT, you can double check by searching for `PCI0.GFX0`, `PCI0.VID` and `PCI0.GPU0`. Whichever shows up is your device

If Windows has been installed on the device, you can also do the following:

    Device Manager -> Display Adapters -> Properties -> Details > BIOS device name

- Note some GPUs may be hiding under "BIOS device name"

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