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From: Jaroslav Kysela <>
To: Benjamin Poirier <>
Cc: Takashi Iwai <>, Kailang Yang <>,,
Subject: Re: [PATCH 2/2] ALSA: hda/realtek - Fix Lenovo Thinkpad X1 Carbon 7th quirk value
Date: Tue, 11 Feb 2020 10:35:19 +0100	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <20200211081604.GA8286@f3>

Dne 11. 02. 20 v 9:16 Benjamin Poirier napsal(a):
> On 2020/02/11 08:40 +0100, Jaroslav Kysela wrote:
> [...]
>>> In summary, Node 0x17 DAC connection 0x3 offers the loudest max volume and
>>> the most detailed mixer controls. That connection is obtained with quirk
>>> ALC295_FIXUP_DISABLE_DAC3. Therefore, change the ThinkPad X1 Carbon 7th to
>> The volume split (individual volume control) will cause trouble for the UCM
>> volume control at the moment which is the target for this device to get the
>> digital microphone working. If there is no possibility to share DAC, it
>> would be probably more nice to join the volume control in the driver.
>> Have you tried to use 0x03 as source for all four speakers?
> Front speakers are fixed to 0x02. Node 0x14
>    Connection: 1
>       0x02

Yes, you're right. I forgot that.

>> Why PA handles the rear volume control with the current driver code in the
>> legacy ALSA driver? It should be handled like standard stereo device. I'll
>> check.
> The device comes up with "Analog Stereo Output" profile by default. I
> changed it to "Analog Surround 4.0 Output" to test controlling each
> channel individually:

Yes, but does the volume control work (does PA change the appropriate ALSA 
mixer volume)? Sometimes, it's difficult to see the difference between soft 
volume attenuation and the hardware volume control.

>>> pavucontrol controls are reported with the device configured with the
>>> "Analog Surround 4.0 Output" profile.
>> You should also test PA with UCM.
> Please let me know what do I need to test exactly? I'm not familiar with
> UCM.

Just install the latest pulseaudio (latest from repo), alsa-lib and 
alsa-ucm-conf (also from repo). If pulseaudio detects UCM, it has the preference.



Jaroslav Kysela <>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.

  parent reply	other threads:[~2020-02-11  9:35 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-11  5:56 [PATCH 1/2] ALSA: hda/realtek - Fix Lenovo Thinkpad X1 Carbon 7th quirk subdevice id Benjamin Poirier
2020-02-11  5:56 ` [PATCH 2/2] ALSA: hda/realtek - Fix Lenovo Thinkpad X1 Carbon 7th quirk value Benjamin Poirier
2020-02-11  7:40   ` Jaroslav Kysela
2020-02-11  8:16     ` Benjamin Poirier
2020-02-11  9:10       ` Kailang
2020-02-11  9:20         ` Takashi Iwai
2020-02-11  9:57           ` Kailang
2020-02-12  6:32           ` Kailang
2020-02-11  9:35       ` Jaroslav Kysela [this message]
2020-02-11 11:42         ` Benjamin Poirier
2020-02-11 13:56           ` Jaroslav Kysela

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