Re: [PATCH v2] ALSA: hda/realtek: Fix audio after Windows reboot on ASUS Q423SA

[Takashi Iwai]

On Mon, 05 Oct 2026 17:40:17 +0200,
Scott Gauche wrote:
> 
> The ASUS Vivobook S 14 Q423SA-U5512 (DMI family S5406SA) with the
> ALC294 codec has working analog audio when booted directly after a full
> shutdown. After a warm reboot from Windows 11, audio works briefly during
> Linux startup, then both the internal speakers and headphones become
> silent. PCM playback continues without errors.
> 
> Coefficient 0x1b is 0x4e4b on a direct cold boot, but 0x4a4b after the
> Windows warm reboot. Restoring bit 10 changes it back to 0x4e4b and
> immediately enables both analog outputs. Speaker playback, headphone
> playback, jack switching, cold boot, and suspend/resume were tested
> successfully. The same 0x4a4b state and immediate recovery with 0x4e4b
> were independently confirmed on another S5406SA with subsystem 1043:10c4.
> 
> The same coefficient write is already used by
> ALC294_FIXUP_ASUS_COEF_1B for the ASUS UX431DA. That fixup cannot be
> reused here because it chains to ALC289_FIXUP_ASUS_GA401 and applies
> unrelated DAC routing and microphone pin configuration.
> 
> Add a model-specific fixup for subsystem 1043:10c4 and chain it to the
> existing ALC2XX_FIXUP_HEADSET_MIC fixup instead.
> 
> Link: https://github.com/thesofproject/sof/issues/11051
> Fixes: f2d08f3651fb ("ALSA: hda/realtek: Fix headset mic on ASUS Vivobook S14 S5406SA")
> Signed-off-by: Scott Gauche <scott-dev@xxxxxxxxxxxxxxx>

Applied to for-next branch.  Thanks.


Takashi