[Bug 2112330] Re: Internal microphone not working on ASUS VivoBook with Realtek ALC256 (Ubuntu 24.04 + kernel 6.15)

** Changed in: linux (Ubuntu Questing)
Status: Won't Fix => Fix Released

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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:
New
Status in linux source package in Plucky:
In Progress
Status in linux source package in Questing:
Fix Released

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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