Re: [PATCH 1/4] ALSA: hda/realtek: Rename Line Out control to Headphone on ThinkPad X1 Carbon 6th

On Tue, 11 Aug 2026 04:48:59 +0200,
Zhang Heng wrote:
> 
> The ThinkPad X1 Carbon 6th Gen (ALC285, SSID 17aa:225c) has no physical
> Line Out jack. The 3.5mm headphone jack is wired to the headphone DAC,
> but the ALSA HDA driver names the corresponding control as
> "Line Out Playback Volume" (node 0x02).
> 
> PipeWire's ALSA Card Profile (ACP) silences "Line Out" when headphones
> are activated, which incorrectly mutes the headphone output.
> 
> Add a quirk to rename the control to "Headphone Playback Volume" via
> alc285_lenovo_dac_rename().
> 
> Tested on openSUSE Tumbleweed (kernel 7.1.5):
> - Control renamed successfully, no name collision with "Headphone Playback Switch"
> - Headphone output works across multiple PipeWire/WirePlumber restarts
>   and port switches
> 
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221522
> Signed-off-by: Zhang Heng <[email protected]>
> Tested-by: Branislav Klocok <[email protected]>
> ---
>  sound/hda/codecs/realtek/alc269.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/sound/hda/codecs/realtek/alc269.c b/sound/hda/codecs/realtek/alc269.c
> index 6b36c730ce78..da9c816b8c4f 100644
> --- a/sound/hda/codecs/realtek/alc269.c
> +++ b/sound/hda/codecs/realtek/alc269.c
> @@ -2572,6 +2572,13 @@ static void alc282_fixup_asus_tx300(struct hda_codec *codec,
>  	}
>  }
>  
> +static void alc285_lenovo_dac_rename(struct hda_codec *codec,
> +				     const struct hda_fixup *fix, int action)
> +{
> +	if (action == HDA_FIXUP_ACT_BUILD)
> +		rename_ctl(codec, "Line Out Playback Volume",
> +			   "Headphone Playback Volume");
> +}
>  static void alc290_fixup_mono_speakers(struct hda_codec *codec,
>  				       const struct hda_fixup *fix, int action)
>  {
> @@ -6998,6 +7005,10 @@ static const struct hda_fixup alc269_fixups[] = {
>  		.chained = true,
>  		.chain_id = ALC287_FIXUP_YOGA9_14IAP7_BASS_SPK_PIN,
>  	},
> +	[ALC285_LENOVO_DAC_RENAME] = {
> +		.type = HDA_FIXUP_FUNC,
> +		.v.func = alc285_lenovo_dac_rename,
> +	},
>  };
>  
>  static const struct hda_quirk alc269_fixup_tbl[] = {
> @@ -7956,6 +7967,7 @@ static const struct hda_quirk alc269_fixup_tbl[] = {
>  	SND_PCI_QUIRK(0x17aa, 0x224b, "Thinkpad", ALC298_FIXUP_TPT470_DOCK),
>  	SND_PCI_QUIRK(0x17aa, 0x224c, "Thinkpad", ALC298_FIXUP_TPT470_DOCK),
>  	SND_PCI_QUIRK(0x17aa, 0x224d, "Thinkpad", ALC298_FIXUP_TPT470_DOCK),
> +	SND_PCI_QUIRK(0x17aa, 0x225c, "Lenovo ThinkPad X1 Carbon 6th Gen", ALC285_LENOVO_DAC_RENAME),
>  	SND_PCI_QUIRK(0x17aa, 0x225d, "Thinkpad T480", ALC269_FIXUP_THINKPAD_LIMIT_INT_MIC_BOOST),
>  	SND_PCI_QUIRK(0x17aa, 0x2288, "Thinkpad X390", ALC285_FIXUP_THINKPAD_NO_BASS_SPK_HEADSET_JACK),
>  	SND_PCI_QUIRK(0x17aa, 0x2292, "Thinkpad X1 Carbon 7th", ALC285_FIXUP_THINKPAD_HEADSET_JACK),

Hmm,  this patch is broken -- missing the definition of enum
ALC285_LENOVO_DAC_RENAME?


thanks,

Takashi