Comment 0 for bug 2011623

The internal mic does not work out-of-the-box. The recorded sound is barely audible on many apps, such as Skype, Teams, Zoom.

Quick fix is to mute one of the channel.

Same issue as described here: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1002978

SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH successful
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Mic, Internal
Symptom_PulseAudioRecordingTest: PulseAudio recording test through plughw:PCH successful
Symptom_Type: None of the above
Tags: jammy
Title: [80SM, Conexant CX20751/2, Mic, Internal] Recording problem
Uname: Linux 5.15.0-67-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
_MarkForUpload: True
dmi.bios.date: 03/21/2016
dmi.bios.release: 1.23
dmi.bios.vendor: LENOVO
dmi.bios.version: 0XCN23WW
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Toronto 5A2
dmi.board.vendor: LENOVO
dmi.board.version: 31900002 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo ideapad 310-15ISK
dmi.ec.firmware.release: 1.23
dmi.modalias: dmi:bvnLENOVO:bvr0XCN23WW:bd03/21/2016:br1.23:efr1.23:svnLENOVO:pn80SM:pvrLenovoideapad310-15ISK:rvnLENOVO:rnToronto5A2:rvr31900002WIN:cvnLENOVO:ct10:cvrLenovoideapad310-15ISK:skuLENOVO_MT_80SM_BU_idea_FM_Lenovoideapad310-15ISK:
dmi.product.family: IDEAPAD
dmi.product.name: 80SM
dmi.product.sku: LENOVO_MT_80SM_BU_idea_FM_Lenovo ideapad 310-15ISK
dmi.product.version: Lenovo ideapad 310-15ISK
dmi.sys.vendor: LENOVO