[PATCH] ALSA: hda/realtek: Fix Acer Nitro 5 AN515-57 mic resume
From: Rithvik Vibhu
Date: Fri Sep 04 2026 - 19:16:38 EST
The existing pin-configuration quirk exposes headset mic pin 0x19, but
the ALC295 loses the correct combo-jack state across suspend-to-RAM
(S3). After resume, pin 0x19 can remain falsely present after unplug and
the capture mixer can remain routed away from the internal mic on pin
0x12. The failure occurs on both 6.12 and v7.2-rc7.
Give subsystem 1025:1539 a model-specific fixup which initializes the
Acer combo-jack coefficients, enables the full Realtek CTIA/OMTP
headset state machine, gates the headset mic with the reliable
headphone pin 0x21, and feeds the corrected cached jack state through
generic HDA mic autoswitching. This keeps the actual capture mux
synchronized across boot, hotplug, unplug and S3 resume.
Apply the correction from both the headphone and microphone callback
paths. A direct event from mic pin 0x19 otherwise bypasses the headphone
hook and can restore the unreliable raw pin sense. Invalidate and
refetch pin 0x21 when handling such an event before deriving the
corrected microphone state.
Pin 0x21 indicates that a combo-jack plug is present but cannot
distinguish three-pole headphones from a four-pole headset.
Consequently, as with other headphone-gated mic configurations, a
three-pole plug is exposed as a headset mic.
Tested with cold boot and repeated S3 cycles in the unplugged and
four-pole-headset states, including unplug and reinsert after resume.
Fixes: 51db05283f7c ("ALSA: hda/realtek: Enable headset mic for Acer Nitro 5")
Cc: stable@xxxxxxxxxxxxxxx # 6.12+
Assisted-by: LLM
Signed-off-by: Rithvik Vibhu <rithvikvibhu@xxxxxxxxx>
---
The 6.12.y backport requires adaptation because the Realtek codec code
is located in sound/pci/hda/patch_realtek.c there.
base-commit: 3b26ceef88c110f4d188387cffa0df78657be904
sound/hda/codecs/realtek/alc269.c | 105 +++++++++++++++++++++++++++++-
1 file changed, 104 insertions(+), 1 deletion(-)
diff --git a/sound/hda/codecs/realtek/alc269.c b/sound/hda/codecs/realtek/alc269.c
index 95b40a177..f1a83908e 100644
--- a/sound/hda/codecs/realtek/alc269.c
+++ b/sound/hda/codecs/realtek/alc269.c
@@ -3740,6 +3740,103 @@ static void alc2xx_fixup_headset_mic(struct hda_codec *codec,
}
}
+static void alc295_acer_nitro_mic_autoswitch(struct hda_codec *codec,
+ struct hda_jack_callback *jack)
+{
+ struct alc_spec *spec = codec->spec;
+ struct hda_jack_tbl *hp_jack, *mic_jack;
+ hda_nid_t hp_pin = alc_get_hp_pin(spec);
+ bool auto_mic = spec->gen.auto_mic;
+ bool hp_present;
+
+ hp_jack = snd_hda_jack_tbl_get(codec, hp_pin);
+ mic_jack = snd_hda_jack_tbl_get(codec, 0x19);
+ if (!hp_jack || !mic_jack) {
+ codec_warn(codec, "failed to find Acer Nitro combo-jack entries\n");
+ return;
+ }
+
+ /* A mic callback must not reuse a possibly stale cached HP sense. */
+ if (jack && jack->nid == 0x19)
+ hp_jack->jack_dirty = 1;
+ hp_present = snd_hda_jack_detect(codec, hp_pin);
+
+ /*
+ * The codec reports a stale or inverted presence state for mic pin 0x19
+ * after S3. Pin 0x21 continues to track the shared combo jack reliably,
+ * so use it as the presence source for 0x19. Leave the entry clean so
+ * the normal report pass does not immediately replace this value with a
+ * broken raw pin-sense read.
+ */
+ mic_jack->pin_sense &= ~AC_PINSENSE_PRESENCE;
+ if (hp_present)
+ mic_jack->pin_sense |= AC_PINSENSE_PRESENCE;
+ mic_jack->jack_dirty = 0;
+
+ /* Route the actual capture mux from the corrected jack state. */
+ spec->gen.auto_mic = 1;
+ snd_hda_gen_mic_autoswitch(codec, jack);
+ spec->gen.auto_mic = auto_mic;
+}
+
+static void alc295_acer_nitro_hp_automute(struct hda_codec *codec,
+ struct hda_jack_callback *jack)
+{
+ /* Refresh the reliable HP jack and the Realtek headset mode first. */
+ alc_update_headset_jack_cb(codec, jack);
+ alc295_acer_nitro_mic_autoswitch(codec, jack);
+}
+
+static void alc295_fixup_acer_nitro_headset_mode(struct hda_codec *codec,
+ const struct hda_fixup *fix,
+ int action)
+{
+ struct alc_spec *spec = codec->spec;
+ static const struct hda_pintbl pincfgs[] = {
+ { 0x19, 0x03a1103c },
+ { }
+ };
+
+ if (action == HDA_FIXUP_ACT_PRE_PROBE) {
+ snd_hda_apply_pincfgs(codec, pincfgs);
+ alc_update_coef_idx(codec, 0x45, 0xf << 12 | 1 << 10, 5 << 12);
+ spec->parse_flags |= HDA_PINCFG_HEADSET_MIC;
+ }
+
+ alc271_hp_gate_mic_jack(codec, fix, action);
+ alc_fixup_headset_mode_no_hp_mic(codec, fix, action);
+
+ if (action == HDA_FIXUP_ACT_PROBE) {
+ int int_mic_idx = -1, headset_mic_idx = -1;
+ int i;
+
+ for (i = 0; i < spec->gen.input_mux.num_items; i++) {
+ if (spec->gen.imux_pins[i] == 0x12)
+ int_mic_idx = i;
+ else if (spec->gen.imux_pins[i] == 0x19)
+ headset_mic_idx = i;
+ }
+ if (int_mic_idx < 0 || headset_mic_idx < 0) {
+ codec_warn(codec,
+ "failed to find Acer Nitro mic mux entries\n");
+ return;
+ }
+
+ spec->gen.am_num_entries = 2;
+ spec->gen.am_entry[0] = (struct automic_entry) {
+ .pin = 0x12,
+ .idx = int_mic_idx,
+ };
+ spec->gen.am_entry[1] = (struct automic_entry) {
+ .pin = 0x19,
+ .idx = headset_mic_idx,
+ };
+ spec->gen.hp_automute_hook = alc295_acer_nitro_hp_automute;
+ spec->gen.mic_autoswitch_hook =
+ alc295_acer_nitro_mic_autoswitch;
+ }
+}
+
static void alc245_fixup_hp_spectre_x360_eu0xxx(struct hda_codec *codec,
const struct hda_fixup *fix, int action)
{
@@ -4335,6 +4432,7 @@ enum {
ALC287_FIXUP_THINKPAD_I2S_SPK,
ALC287_FIXUP_MG_RTKC_CSAMP_CS35L41_I2C_THINKPAD,
ALC2XX_FIXUP_HEADSET_MIC,
+ ALC295_FIXUP_ACER_NITRO_HEADSET_MODE,
ALC289_FIXUP_DELL_CS35L41_SPI_2,
ALC256_FIXUP_ACER_SFG16_MICMUTE_LED,
ALC256_FIXUP_HEADPHONE_AMP_VOL,
@@ -6854,6 +6952,10 @@ static const struct hda_fixup alc269_fixups[] = {
.type = HDA_FIXUP_FUNC,
.v.func = alc2xx_fixup_headset_mic,
},
+ [ALC295_FIXUP_ACER_NITRO_HEADSET_MODE] = {
+ .type = HDA_FIXUP_FUNC,
+ .v.func = alc295_fixup_acer_nitro_headset_mode,
+ },
[ALC289_FIXUP_DELL_CS35L41_SPI_2] = {
.type = HDA_FIXUP_FUNC,
.v.func = cs35l41_fixup_spi_two,
@@ -7177,7 +7279,8 @@ static const struct hda_quirk alc269_fixup_tbl[] = {
SND_PCI_QUIRK(0x1025, 0x1430, "Acer TravelMate B311R-31", ALC256_FIXUP_ACER_MIC_NO_PRESENCE),
SND_PCI_QUIRK(0x1025, 0x1466, "Acer Aspire A515-56", ALC255_FIXUP_ACER_HEADPHONE_AND_MIC),
SND_PCI_QUIRK(0x1025, 0x1534, "Acer Predator PH315-54", ALC255_FIXUP_ACER_MIC_NO_PRESENCE),
- SND_PCI_QUIRK(0x1025, 0x1539, "Acer Nitro 5 AN515-57", ALC2XX_FIXUP_HEADSET_MIC),
+ SND_PCI_QUIRK(0x1025, 0x1539, "Acer Nitro 5 AN515-57",
+ ALC295_FIXUP_ACER_NITRO_HEADSET_MODE),
SND_PCI_QUIRK(0x1025, 0x159c, "Acer Nitro 5 AN515-58", ALC287_FIXUP_ACER_MICMUTE_LED),
SND_PCI_QUIRK(0x1025, 0x1597, "Acer Nitro 5 AN517-55", ALC2XX_FIXUP_HEADSET_MIC),
SND_PCI_QUIRK(0x1025, 0x159e, "Acer Nitro 5 AN515-46", ALC2XX_FIXUP_HEADSET_MIC),
--
2.55.0