ACK: [SRU][R][PATCH 0/1] Fix noise of audio output on more Dell QCx1255 models after reboot

[Kuan-Ying Lee]

On Wed, Aug 12, 2026 at 11:41:32AM +0800, Chris Chiu via kernel-team wrote:
> BugLink: https://bugs.launchpad.net/bugs/2163293
> 
> [Impact]
> More Dell Pro QCx1255 systems have headphone pop noise when using Pipewire audio server on Ubuntu 24.04. The noise appears when headphones are plugged in. The issue does not occur with Pulseaudio.
> 
> [Fix]
> Apply the quirk ALC236_FIXUP_DELL_HP_POP_NOISE for more Dell Pro QCx1255 systems to route headphone output to DAC 0x2, which eliminates the popping sound.
> 
> Upstream commit: https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/commit/?h=for-linus&id=9573818cc1b7ac22176d0a2b60bfbc440e94f7d5
> 
> [Test Plan]
> 1. Boot Dell Pro QCx1255 with Ubuntu 24.04 and Pipewire audio server
> 2. Plug in headphones
> 3. Without patch: popping/crackling noise heard through headphones
> 4. With patch: no popping noise, clean audio output
> 
> [Where problems could occur]
> Only take effect on particular SSIDs. The risk of regression should be low
> 
> Kailang Yang (1):
>   ALSA: hda/realtek - Add quirk for Dell Pro QC1255
> 
>  sound/hda/codecs/realtek/alc269.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)

Acked-by: Kuan-Ying Lee <kuan-ying.lee at canonical.com>