[Dell XPS 8940] [ALC3861] No audio from headset mic when plugged into front panel jack, works under Windows

[Jonathan Yip]

There is no audio coming from the headset mic when plugged into the front panel headset jack (bog standard wired headphones with mic, Sony MDR-EX15AP). Upon plugging in Gnome should offer a choice of "Headset" amongst others, but the only ones available are "Headphones" and "Microphone", neither of which enables the mic on the headset. The same headset works under Windows, so it shouldn't be an issue of mismatching TRRS.

I'm happy to provide any further details if needed.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: alsa-base 1.0.25+dfsg-0ubuntu7
ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30
Uname: Linux 5.15.0-27-generic x86_64
ApportVersion: 2.20.11-0ubuntu82
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: jonathan 8896 F.... pulseaudio
CasperMD5CheckResult: unknown
CurrentDesktop: GNOME
Date: Tue May 3 13:54:25 2022
InstallationDate: Installed on 2021-08-16 (260 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH successful
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_DevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: jonathan 8896 F.... pulseaudio
Symptom_PulseAudioRecordingTest: PulseAudio recording test through plughw:PCH successful
Symptom_Type: No sound at all
Title: [HDA-Intel - HDA Intel PCH, recording] No sound at all
UpgradeStatus: Upgraded to jammy on 2022-04-27 (5 days ago)
dmi.bios.date: 03/29/2022
dmi.bios.release: 2.5
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.5.1
dmi.board.name: 0427JK
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr2.5.1:bd03/29/2022:br2.5:svnDellInc.:pnXPS8940:pvr:rvnDellInc.:rn0427JK:rvrA00:cvnDellInc.:ct3:cvr:sku09C5:
dmi.product.family: XPS
dmi.product.name: XPS 8940
dmi.product.sku: 09C5
dmi.sys.vendor: Dell Inc.
modified.conffile..etc.modprobe.d.alsa-base.conf: [modified]
mtime.conffile..etc.modprobe.d.alsa-base.conf: 2022-04-28T14:25:53.371743

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.