The rear panel of Lenovo P620 doesn't support more than one audio device at the same time

[jeremyszu]

== 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.

[Sebastien Bacher (seb128)]

2 of the pulseaudio patches landed upstream now, maybe time to nag on the first one and then we should be able to get the fixes in Hirsute at least?

[jeremyszu (os369510)]

Since alsa-ucm-conf is updated by following the upstream version.

```
commit aa74f4c12eefcc98582572d2fc48982cf7478b51 (tag: pkg/import/1.2.4-1)
Author: Jordi Mallach <email address hidden>
Date: Mon Dec 7 22:13:23 2020 +0100

    1.2.4-1 (patches unapplied)

    Imported using git-ubuntu import.

Notes (changelog):
      * New upstream release.
      * Update Standards-Version to 4.5.1, with no changes needed.
```

Above commit already brought https://github.com/alsa-project/alsa-ucm-conf/tree/master/ucm2/USB-Audio for P620 parts.

[jeremyszu (os369510)]

@Seb,

do you think I can work on SRU

https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/354
https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/355

these two patches? since the #290 patch seems like still need a long time discussion on upstream and only this patch have high potential regression risk.

so far I need to backport these three patches and maintain on our archive. If we could reduce the scope then it will be helpful in current situation.

[jeremyszu (os369510)]

Although comment#2 is merged, this issue still needs PA corresponding (https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/290).

Therefore, we will deliver a special alsa-ucm-conf on our oem-archive as short-term solution and leave it be replaced after this ticket gets the merge.

[Sebastien Bacher (seb128)]

@Jeremyszu, backporting the patches that landed upstream in Ubuntu is alright if it helps you

[jeremyszu (os369510)]

@Seb,

I'll work on these two patches comment#3 mentioned in the other bug.
https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1929371

Let's leave this ticket to track https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/290

[Sebastien Bacher (seb128)]

Upstream change for replaced by this one now, https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/582

[jeremyszu (os369510)]

Upstream seems replaced the comment#7 by https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/596

[Kai-Heng Feng (kaihengfeng)]

We only need to update UCM to solve this issue for Lenovo P620.

[Kai-Heng Feng (kaihengfeng)]

alsa-ucm-conf debdiff for Focal

[David Ober (dober60)]

Following instruction in forwarded email after appling the alsa-ucm-conf=1.2.2-1ubuntu0.12sutton1 package the rear microphone jack works correctly

[Timo Aaltonen (tjaalton)]

Hello jeremyszu, or anyone else affected,

Accepted alsa-ucm-conf into focal-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/alsa-ucm-conf/1.2.2-1ubuntu0.13 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed-focal to verification-done-focal. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-focal. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Kai-Heng Feng (kaihengfeng)]

I enabled proposed and upgrade alsa-ucm-conf, then reboot the system.

I plugged a microphone to the rear panel, made sure it works, then I plugged a speaker to line-out, and made sure both speaker and mic are working. So the original issue is solved by this SRU.

[Łukasz Zemczak (sil2100)]

The verification of the Stable Release Update for alsa-ucm-conf has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

[Launchpad Janitor (janitor)]

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 <email address hidden> Tue, 22 Mar 2022 20:43:51 +0800