This bug is awaiting verification that the linux-
nvidia-6.14/6.14.0-1011.11 kernel in -proposed solves the problem.
Please test the kernel and update this bug with the results. If the
problem is solved, change the tag 'verification-needed-noble-linux-
nvidia-6.14' to 'verification-done-noble-linux-nvidia-6.14'. If the
problem still exists, change the tag 'verification-needed-noble-linux-
nvidia-6.14' to 'verification-failed-noble-linux-nvidia-6.14'.


If verification is not done by 5 working days from today, this fix will
be dropped from the source code, and this bug will be closed.


See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: kernel-spammed-noble-linux-nvidia-6.14-v2 
verification-needed-noble-linux-nvidia-6.14

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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)

Status in linux package in Ubuntu:
  Confirmed
Status in linux source package in Plucky:
  Fix Released
Status in linux source package in Questing:
  Confirmed

Bug description:
  [Impact]
  On various ASUS Vivobook with Realtek audio codec ALC256, the audio input 
device will disappear thus the microphone does not work anymore. It happens 
after this commit 3b4309546b48 ("ALSA: hda: Fix headset detection failure due 
to unstable sort") on 6.14-rc1.

  [Fix]
  Backported patches for ASUS Vivobook which use the correct fixup which is not 
affected by the order problem caused by commit 3b4309546b48 ("ALSA: hda: Fix 
headset detection failure due to unstable sort")

  [Test Case]
  1. Get ASUS Vivobook laptops and boot up.
  2. Check if the audio input device exist
  3. use `arecord` to record sound with the microphone

  [Where problems could occur]
  They are only quirked for ASUS Vivobook SSIDs with ALC256. Should have no 
impact for other platforms. The risk should be low.

  
  ========== original bug description ==========
  I'm using an ASUS VivoBook (11th Gen Intel i7, Realtek ALC256 audio codec). 
On Ubuntu 24.04.2 LTS, the internal microphone is detected and listed correctly 
in PulseAudio/PipeWire and ALSA, but no input is captured. Microphone volume 
and boost are set to 100%, not muted. Input device appears as RUNNING in pactl, 
but no signal is recorded.

  I tested:
  - Ubuntu 24.04 with default kernel (6.11)
  - Upgraded to mainline kernel 6.15 via `mainline` tool
  - ALSA, PipeWire, PulseAudio all installed and working
  - External USB mic works perfectly
  - BIOS does not expose any audio/microphone control
  - Mic also tested with `pw-record`, `arecord`, `gnome-sound-recorder` — all 
silent

  ALSA info:
  https://alsa-project.org/db/?f=6d6466ba903b2e08b351046571e0fc54ddd13981

  It seems like a pin configuration or unsupported codec issue with
  ALC256. Please advise if this requires a patch or model-specific
  quirk.

  Thank you.

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