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Posted

I have tried the method above by:

  • changing the codec layout ID in "NVRAM > boot-args"
  • adding "layout-id > (hex number) > data" under DeviceProperties > Pciroot(0x0)/Pci(0x1f,0x3)
  • saving, shutting down, and turning it back on

However, the result remains the same: the codec/sound is still not detected.

Picture NVRAM

Picture Layout ALC256

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