Re: [PATCH] ALSA: hda/realtek: Enable rear line-out pins on MSI EC79 (ALCS1200A)

[Takashi Iwai]

On Sun, 15 Mar 2026 11:19:50 +0100,
James Waschbisch wrote:
> 
> On MSI systems with subsystem ID 1462:ec79 using the Realtek ALCS1200A
> codec, the rear line-out pins (0x14, 0x15, 0x16) are parsed as line
> outputs but do not come up with active pin widget control after boot.
> This leaves analog output on the rear jacks unavailable until userspace
> manually reprograms the codec.
> 
> Add a board-specific fixup that disables line-out/speaker automute and
> forces pins 0x14, 0x15, and 0x16 to PIN_OUT during HDA_FIXUP_ACT_INIT,
> while also clearing the output amp mute on those nodes.
> 
> Tested-on: MSI X570 Gaming Pro WiFi (1462:ec79, ALCS1200A)
> 
> Signed-off-by: James Waschbisch <james@xxxxxxxxxx>

When this kind of changes like the manual amp updates or pin control
fiddling are needed, usually something else is missing.
Could you give alsa-info.sh output for further investigation?
Run the script with --no-upload option and attach the output.


thanks,

Takashi

> ---
>  sound/hda/codecs/realtek/alc882.c | 38 +++++++++++++++++++++++++++++++
>  1 file changed, 38 insertions(+)
> 
> diff --git a/sound/hda/codecs/realtek/alc882.c b/sound/hda/codecs/realtek/alc882.c
> index 529fecd5b..2bf266a25 100644
> --- a/sound/hda/codecs/realtek/alc882.c
> +++ b/sound/hda/codecs/realtek/alc882.c
> @@ -60,6 +60,7 @@ enum {
>  	ALC887_FIXUP_ASUS_AUDIO,
>  	ALC887_FIXUP_ASUS_HMIC,
>  	ALCS1200A_FIXUP_MIC_VREF,
> +	ALCS1200A_FIXUP_MSI_EC79,
>  	ALC888VD_FIXUP_MIC_100VREF,
>  };
>  
> @@ -261,6 +262,36 @@ static void alc887_fixup_asus_jack(struct hda_codec *codec,
>  	spec->gen.hp_automute_hook = alc887_asus_hp_automute_hook;
>  }
>  
> +static void alcs1200a_fixup_msi_ec79(struct hda_codec *codec,
> +				     const struct hda_fixup *fix, int action)
> +{
> +	struct alc_spec *spec = codec->spec;
> +
> +	if (action == HDA_FIXUP_ACT_PRE_PROBE) {
> +		spec->gen.automute_lo = 0;
> +		spec->gen.automute_speaker = 0;
> +		return;
> +	}
> +
> +	if (action != HDA_FIXUP_ACT_INIT)
> +		return;
> +
> +	/* Front / Surround / CLFE line-out pins */
> +	snd_hda_set_pin_ctl(codec, 0x14, PIN_OUT);
> +	snd_hda_set_pin_ctl(codec, 0x15, PIN_OUT);
> +	snd_hda_set_pin_ctl(codec, 0x16, PIN_OUT);
> +
> +	/* Unmute both output amp channels on all three pins */
> +	snd_hda_codec_amp_update(codec, 0x14, 0, HDA_OUTPUT, 0, 0x80, 0);
> +	snd_hda_codec_amp_update(codec, 0x14, 1, HDA_OUTPUT, 0, 0x80, 0);
> +
> +	snd_hda_codec_amp_update(codec, 0x15, 0, HDA_OUTPUT, 0, 0x80, 0);
> +	snd_hda_codec_amp_update(codec, 0x15, 1, HDA_OUTPUT, 0, 0x80, 0);
> +
> +	snd_hda_codec_amp_update(codec, 0x16, 0, HDA_OUTPUT, 0, 0x80, 0);
> +	snd_hda_codec_amp_update(codec, 0x16, 1, HDA_OUTPUT, 0, 0x80, 0);
> +}
> +
>  static const struct hda_fixup alc882_fixups[] = {
>  	[ALC882_FIXUP_ABIT_AW9D_MAX] = {
>  		.type = HDA_FIXUP_PINS,
> @@ -553,6 +584,12 @@ static const struct hda_fixup alc882_fixups[] = {
>  			{}
>  		}
>  	},
> +	[ALCS1200A_FIXUP_MSI_EC79] = {
> +		.type = HDA_FIXUP_FUNC,
> +		.v.func = alcs1200a_fixup_msi_ec79,
> +		.chained = true,
> +		.chain_id = ALCS1200A_FIXUP_MIC_VREF,
> +	},
>  	[ALC888VD_FIXUP_MIC_100VREF] = {
>  		.type = HDA_FIXUP_PINCTLS,
>  		.v.pins = (const struct hda_pintbl[]) {
> @@ -636,6 +673,7 @@ static const struct hda_quirk alc882_fixup_tbl[] = {
>  	SND_PCI_QUIRK(0x1458, 0xa0cd, "Gigabyte X570 Aorus Master", ALC1220_FIXUP_GB_X570),
>  	SND_PCI_QUIRK(0x1458, 0xa0ce, "Gigabyte X570 Aorus Xtreme", ALC1220_FIXUP_GB_X570),
>  	SND_PCI_QUIRK(0x1458, 0xa0d5, "Gigabyte X570S Aorus Master", ALC1220_FIXUP_GB_X570),
> +	SND_PCI_QUIRK(0x1462, 0xec79, "MSI ALCS1200A", ALCS1200A_FIXUP_MSI_EC79),
>  	SND_PCI_QUIRK(0x1462, 0x11f7, "MSI-GE63", ALC1220_FIXUP_CLEVO_P950),
>  	SND_PCI_QUIRK(0x1462, 0x1228, "MSI-GP63", ALC1220_FIXUP_CLEVO_P950),
>  	SND_PCI_QUIRK(0x1462, 0x1229, "MSI-GP73", ALC1220_FIXUP_CLEVO_P950),
> -- 
> 2.53.0
>