Re: [PATCH v2] ALSA: hda/realtek: Fix cold-boot headset misdetection on Acer Aspire A515-57G

[Takashi Iwai <tiwai@suse.de>]

On Wed, 02 Sep 2026 19:13:05 +0200,
Oleksandr Kovalov wrote:
> 
> On the Acer Aspire A515-57G (PCI SSID 1025:1616), if headphones are
> already inserted into the combo jack before the codec powers up (a cold
> boot with the plug already seated), the impedance-based headset-type
> sensing races and misclassifies the jack. This drives the wrong output
> configuration and is audible as missing center-panned content (e.g.
> vocals) while panned content plays normally.
> 
> A genuine physical unplug/replug after boot reliably fixes this by
> forcing a fresh sense transient, which is a strong hint about the
> underlying cause: the sensing hardware appears to need a settled,
> freshly-triggered read rather than the one-shot classification done
> during the normal HDA_FIXUP_ACT_INIT pass.
> 
> Add a machine-specific fixup that, on cold boot only (not S3/S4 resume,
> which already gets its own re-check), waits briefly after the normal
> init-time decision and then forces a fresh headset-mode classification
> by resetting the cached mode and re-invoking the existing
> alc_fixup_headset_mode() path -- mirroring what a manual replug already
> does. The wait+recheck is skipped whenever the first pass already
> determined nothing is plugged in, to avoid adding boot latency on the
> common case.
> 
> Chain into the existing ALC256_FIXUP_ACER_SFG16_MICMUTE_LED fixup so
> this quirk-table entry keeps providing mic-mute LED support alongside
> the cold-boot headset fix.
> 
> Tested on kernel 7.1.9 by building the affected module standalone and
> confirming cold boot with headphones pre-inserted plays correctly from
> the very first sample, across multiple boots (including a full restart,
> and headphones inserted mid-POST rather than before power-on), with no
> crashes or warnings and no behavioral difference from a real
> post-replug recovery.
> 
> Signed-off-by: Oleksandr Kovalov <oleksandr.kovalov.work@gmail.com>

Thanks, applied.


Takashi