This bug was fixed in the package alsa-ucm-conf - 1.2.2-1ubuntu0.13
---------------
alsa-ucm-conf (1.2.2-1ubuntu0.13) focal; urgency=medium
* d/p/0035-Revert-PATCH-ucm2-USB-Audio-Add-more-support-to-Leno.patch
d/p/0036-Revert-PATCH-Add-support-for-Lenovo-ThinkStation-P62.patch
d/p/0037-Add-support-for-Lenovo-ThinkStation-P620-Main-Audio.patch
d/p/0038-ucm2-USB-Audio-Add-support-for-Lenovo-ThinkStation-P.patch
d/p/0039-ucm2-USB-Audio-Add-CaptureMixerElem-for-Lenovo-Think.patch
Replace Lenovo P620 UCM files with upstream version to make port selection
in PulseAudio work properly. (LP: #1902464)
-- Kai-Heng Feng <kai.heng.f...@canonical.com> Tue, 22 Mar 2022
20:43:51 +0800
** Changed in: alsa-ucm-conf (Ubuntu Focal)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1902464
Title:
The rear panel of Lenovo P620 doesn't support more than one audio
device at the same time
Status in HWE Next:
New
Status in OEM Priority Project:
Confirmed
Status in alsa-ucm-conf package in Ubuntu:
Fix Released
Status in pulseaudio package in Ubuntu:
Fix Released
Status in alsa-ucm-conf source package in Focal:
Fix Released
Status in pulseaudio source package in Focal:
Fix Released
Bug description:
== SRU Justification ==
[Impact]
On P620, only single port can work on rear panel. For example, when the
Line-Out is plugged, the Mic won't work anymore.
[Fix]
Use upstream version of UCM to handle port priority correctly, instead of
separate ports into different profiles.
[Test]
Once the UCM is in place, all three ports of rear panel work correctly.
[Where problems could occur]
UCM is not a static thing - it's actually interpreted differently at higher
level. So any change in userspace daemons other than PulseAudio may not like
the change and can interpret the UCM in another way.
== Original Bug Report ==
After backporting following patches from PA and alsa-ucm-conf and then it
works.
https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/290
https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/354
https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/355
https://github.com/alsa-project/alsa-ucm-conf/tree/master/ucm2/USB-
Audio [landed by aa74f4c12eefcc98582572d2fc48982cf7478b51]
Here is the test PPA:
https://launchpad.net/~os369510/+archive/ubuntu/oem-package-test
Since the upstream not yet accepted those patches, the regression
potential may quite high.
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