Bug 208133

Summary:	Thinkpad X1 Yoga gen 4 sound issues: no bass, max volume too low, only stereo channels visible to PA
Product:	Drivers	Reporter:	Nate Graham (nate)
Component:	Sound(ALSA)	Assignee:	Jaroslav Kysela (perex)
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	daniel-other+bugzillakernel
Priority:	P1
Hardware:	All
OS:	Linux
See Also:	https://bugzilla.kernel.org/show_bug.cgi?id=207407 https://bugzilla.kernel.org/show_bug.cgi?id=208139 https://bugzilla.kernel.org/show_bug.cgi?id=208145
Kernel Version:	5.6.14	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	Output of `pacmd list-cards`

Description Nate Graham 2020-06-11 02:16:45 UTC

With a Thinkpad X1 Yoga gen 4, Kernel 5.6.14, and PulseAudio 14, The sound situation is as follows:

Good:
- The microphone array works properly out of the box
- The front and rear speakers all produce sound out of the box

Bad:
- The maximum volume is a bit low
- The bass speaker is not working  at all
- The speaker system shows up as a stereo device in PulseAudio, not a 4.1 channel audio device (see also https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/issues/914)
- Useless disconnected devices for the DisplayPort and HDMI audio devices are visible to PulseAudio, cluttering up the display (see also https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/issues/913)

ALSA info is available at http://alsa-project.org/db/?f=f8f00ab594ae7d998aa2a8002dd5202ab1137b4b

Comment 1 Nate Graham 2020-06-11 02:18:12 UTC

Possibly relevant useful: if I set `snd_hda_intel.dmic_detect=0` in the kernel parameters, the mic array is no longer detected, but https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/issues/914 and https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/issues/913get fixed.

Comment 2 Nate Graham 2020-06-11 02:53:23 UTC

Dunno if this should be merged with Bug 207407, which is about broadly similar issues in the X1 Carbon. The X1 Yoga and X1 Carbon are basically a chassis swap with the same internals, so it's quite possible that when one is fixed the other will be too.

Comment 3 Nate Graham 2020-06-11 15:53:57 UTC

Another issue, not sure if it's related: the speakers and headphone jack are correctly combined into multiple ports of the same device such that when I plug in headphones, it switches automatically. However the microphone is not combined with the audio jack's mic input in this way, so it's presented as two microphones rather than one mic device with two ports. Is this an issue at the ALSA level or something  PulseAudio can fix?

Comment 4 Nate Graham 2020-06-11 15:54:48 UTC

Created attachment 289611 [details]
Output of `pacmd list-cards`

Comment 5 Jaroslav Kysela 2020-06-25 13:40:18 UTC


*** This bug has been marked as a duplicate of bug 207407 ***

Comment 6 Jaroslav Kysela 2020-06-25 13:41:23 UTC

There are several merge requests in the pulseaudio gitlab repository to resolve the automatic source / port switch, but it's not related to kernel at all.