Hardware: ASUS VivoBook X513EA
Audio Codec: Realtek ALC256 (HDA Intel PCH)
Ubuntu Version: 24.04.3 LTS (Noble)
Kernel Tested: 6.14.0-1011-oem
Result: Built-in microphone still not working

Verification details:
– Confirmed using alsamixer that both “Internal Mic” and “Internal Mic B” 
appear under Capture view.
– Both were unmuted and raised to ~80%.
– Tested with arecord -f cd -d 5 test.wav and aplay test.wav → no audio 
recorded.
– “Headset Mic” input works normally (tested separately).

ALSA Info: http://alsa-
project.org/db/?f=4b96829b52f7b19fdd003c66b11818ceaabb693c

Additional technical note:
The codec dump shows two possible mic pins:
– Pin 0x19: “Internal Mic” (analog) – appears unused.
– Pin 0x1a: “Internal Mic B” (digital array mic) – likely the actual built-in 
mic connection.

It seems the fix introduced in 6.14.0-1011-oem remaps only pin 0x19,
whereas this VivoBook X513EA uses pin 0x1a for the internal mic.

Marking as verification-failed (noble).

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https://bugs.launchpad.net/bugs/2112330

Title:
  Internal microphone not working on ASUS VivoBook with Realtek ALC256
  (Ubuntu 24.04 + kernel 6.15)

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