Re: ALSA: hda/conexant: Fix silent speaker on Huawei MateBook 14 (SN6140)

[Takashi Iwai <tiwai@suse.de>]

On Sat, 12 Sep 2026 16:03:55 +0200,
刘 栋 wrote:
> 
> 
> Sir/Madam,
> 
> On the Huawei MateBook 14 (PCI SSID 19e5:329e), the SN6140 codec
> silently routes the speaker output through the headphone pin's
> connection select: whatever DAC the headphone pin 0x16 is connected to,
> the speaker pin 0x17 follows. The generic parser attaches the playback
> stream to DAC 0x10 (shared by the headphone path) and mutes that DAC
> when no headphone is plugged, silencing the internal speaker while the
> headphone jack keeps working.
> 
> Add a quirk for this machine that suppresses the auto-mute, binds the
> speaker pin to the shared DAC 0x10, removes the mute switch on that DAC
> so userspace cannot mute it, and re-applies the routing after every
> output update; at init it routes both pins to DAC 0x10, enables the
> speaker EAPD (which the driver otherwise leaves off) and unmutes the
> DAC.
> 
> Note that this is a different problem than the existing Huawei
> Matebook quirk for SSID 19e5:3289 (commit d152afd1cd7a), which fixes a
> missing headphone jack; that machine has working speakers.
> 
> Tested on Ubuntu 26.04 (kernels 7.0.0-30 and 7.0.0-31): the speaker
> plays at boot without any userspace helper, and keeps working across
> suspend/resume.
> 
> Signed-off-by: liudongxjtu <liudongxjtu@outlook.com>

The patch can't be applied because your mailer broke the spaces.

Please try to resubmit with a fixed mailer setup; at best use
git-send-email.

About the patch: please drop the heading "Sir/Madam".  The patch
description will be taken as the commit log as is, so such a greeting
doesn't fit at all.

Also, spelling your name in a bit more Western style (using
capital/lower letters and putting a space between first name and last
name) would be better.


thanks,

Takashi