Huawei MateStation S [AMD HD-Audio + Realtek ALC256] Rear analog output not detected

[Riccardo Boninsegna]

Hello, unfortunately I am not familiar with Ubuntu anymore since a decade so hopefully I'm filing this bug correctly (I am using ubuntu-bug which reportbug recommended to me); that said, my problem is...

The name-brand computer in the topic is almost perfectly Linux* compatible, except for the fact the conventional green audio socket on the back is not detected; however, the rear inputs (mic & line) as well as the front jack (combo headphone+mic, only tested the former) do in fact work fine!

* The problem also manifests in Devuan Chimaera (5.10 and 5.18) and Fedora

I am willing to cooperate in testing if you need to!

Thanks in advance

lspci (relevant device only):
08:00.6 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 10h-1fh) HD Audio Controller [1022:15e3]

/proc/asound/cards (alsamixer):
0 [Generic ]: HDA-Intel - HD-Audio Generic
                     HD-Audio Generic at 0xd05c8000 irq 92
1 [Generic_1 ]: HDA-Intel - HD-Audio Generic
                     HD-Audio Generic at 0xd05c0000 irq 93

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: alsa-base 1.0.25+dfsg-0ubuntu7
ProcVersionSignature: Ubuntu 5.15.0-37.39-generic 5.15.35
Uname: Linux 5.15.0-37-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: riki 1576 F.... pulseaudio
 /dev/snd/controlC0: riki 1576 F.... pulseaudio
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Wed Jun 8 12:07:54 2022
InstallationDate: Installed on 2022-04-26 (43 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Generic_1 failed
Symptom_Card: Family 17h (Models 10h-1fh) HD Audio Controller - HD-Audio Generic
Symptom_Type: Only some of outputs are working
Title: [HDA-Intel - HD-Audio Generic, playback] Playback problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/30/2021
dmi.bios.release: 1.13
dmi.bios.vendor: HUAWEI
dmi.bios.version: 1.13
dmi.board.asset.tag: N/A
dmi.board.name: PUM-WDX9-PCB-B1
dmi.board.vendor: HUAWEI
dmi.board.version: M1020
dmi.chassis.asset.tag: 3430210522028242
dmi.chassis.type: 3
dmi.chassis.vendor: HUAWEI
dmi.chassis.version: M1020
dmi.ec.firmware.release: 1.13
dmi.modalias: dmi:bvnHUAWEI:bvr1.13:bd04/30/2021:br1.13:efr1.13:svnHUAWEI:pnPUM-WDX9:pvrM1020:rvnHUAWEI:rnPUM-WDX9-PCB-B1:rvrM1020:cvnHUAWEI:ct3:cvrM1020:skuC100:
dmi.product.family: MateStation S
dmi.product.name: PUM-WDX9
dmi.product.sku: C100
dmi.product.version: M1020
dmi.sys.vendor: HUAWEI