Headphones have a faint square/triangle wave sound when unmuted

[Donovan Drews]

This issue can be replicated on both Ubuntu 21.10 and 22.04 installs, but is not present on the live USB version of either. It is also not an issue on Fedora 35 (using aplay directly to device) nor Windows 10. The issue can be resolved until reboot by unplugging and replugging several times, as well as switching between speaker and headphones. I am not sure of a deterministic way to replicate this workaround.

Alsamixer reports the chipset as ALC287, but according to specs it is actually an ALC3306. I am not sure if this is related.

I can do any additional testing as necessary to narrow down the issue.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: pulseaudio 1:15.0+dfsg1-1ubuntu6
ProcVersionSignature: Ubuntu 5.13.0-19.19-generic 5.13.14
Uname: Linux 5.13.0-19-generic x86_64
ApportVersion: 2.20.11-0ubuntu74
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Dec 27 20:28:31 2021
InstallationDate: Installed on 2021-12-28 (0 days ago)
InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Alpha amd64 (20211227)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: pulseaudio
Symptom: audio
Symptom_AlsaPlaybackTest: ALSA playback test through plughw:sofhdadsp successful
Symptom_Card: Tiger Lake-H HD Audio Controller - sof-hda-dsp
Symptom_Jack: Black Headphone Out, Right
Symptom_PulsePlaybackTest: PulseAudio playback test failed
Symptom_Type: High background noise, or volume is too low
Title: [20YQ004JUS, Realtek ALC287, Black Headphone Out, Right] Background noise or low volume
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/01/2021
dmi.bios.release: 1.15
dmi.bios.vendor: LENOVO
dmi.bios.version: N37ET34W (1.15 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20YQ004JUS
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.8
dmi.modalias: dmi:bvnLENOVO:bvrN37ET34W(1.15):bd09/01/2021:br1.15:efr1.8:svnLENOVO:pn20YQ004JUS:pvrThinkPadP15Gen2i:skuLENOVO_MT_20YQ_BU_Think_FM_ThinkPadP15Gen2i:rvnLENOVO:rn20YQ004JUS:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad P15 Gen 2i
dmi.product.name: 20YQ004JUS
dmi.product.sku: LENOVO_MT_20YQ_BU_Think_FM_ThinkPad P15 Gen 2i
dmi.product.version: ThinkPad P15 Gen 2i
dmi.sys.vendor: LENOVO