ACK: [SRU][S/U][PATCH 0/1] Fix missing headset on Dell QCx1255 models

[Ivan Hu]

Acked-by: Ivan Hu <ivan.hu at canonical.com>

On Sat, Oct 3, 2026 at 10:46 AM Chris Chiu via kernel-team <
kernel-team at lists.ubuntu.com> wrote:

> From: Chris Chiu <chris.chiu at canonical.com>
>
> BugLink: https://bugs.launchpad.net/bugs/2169175
>
> [Impact]
> The headset microphone does not work on Dell QC1255 models. The earlier
> headphone pop-noise fix leaves out the headset-mode setup.
>
> [Fix]
> Chain the headset-microphone and headset-mode fixup after the headphone
> pop-noise fixup in the Realtek HDA codec driver.
>
> Upstream commit 608c0c8947f03069b651ace54538a115f5b23123 is in the
> sound tree and linux-next,
>
> It fixes the regression introduced by headphone pop-noise fix
> 97272a5704bf, which is in v7.2.
>
> [Test Plan]
> On an affected Dell QCx1255 models, plug in a headset with a microphone
> and select
> the headset microphone as the recording input. List the ALSA capture
> devices:
>
>     arecord -l
>
> Record five seconds while speaking, using the card and device numbers shown
> above for the Realtek codec:
>
>     arecord -D plughw:CARD,DEVICE -f S16_LE -r 48000 -c 1 -d 5
> /tmp/headset-mic.wav
>     aplay /tmp/headset-mic.wav
>
> Replace CARD and DEVICE with those numbers. Without the patch, the headset
> microphone does not record speech. With the patch, the recording contains
> speech from the headset microphone.
>
> [Where problems could occur]
> The change affects headset pin setup on Dell systems using this Realtek HDA
> fixup. If the chained fixup selects the wrong input pins, the headset
> microphone may still be silent or the built-in microphone may stop working.
> If the fixup changes headphone routing, headphone pop noise could return.
>
> Kailang Yang (1):
>   ALSA: hda/realtek - Add headset mode for Dell Pro QC1255
>
>  sound/hda/codecs/realtek/alc269.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> --
> 2.43.0
>
>
> --
> kernel-team mailing list
> kernel-team at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/kernel-team
>
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