Did the internal mic work before?
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https://bugs.launchpad.net/bugs/1876555
Title:
Apps cannot retrieve internal mic input
Status in alsa-driver package in Ubuntu:
New
Bug description:
Could be pulseaudio, alsa-driver, or
~$ /usr/bin/gnome-control-center sound input
Dell Vostro 2520 dual-boot laptop
Intel Corporation 7 Series/C216 Chipset Family High Definition Audio
Controller (rev 04)
2- Cirrus Logic High Definition Audio, model CS4213
Ubuntu 18.04.4 LTS
Windows 10 Home, v. 1903, bld 18362.778
Skype 8.59 (Ubu & Win)
Zoom (cloud meetings) 5.0.3x (Ubu), 5.0.1x (Win)
pulseaudio 1:11.1-1ubuntu7.5
alsa-driver -- package could not be found:
~$ apt-cache policy alsa-driver
N: Unable to locate package alsa-driver
Does this help? /lib/modules/5.3.0-51-generic/kernel/sound/drivers
In Settings > Sound > Input, the On/Off [unmute/mute] setting *appearance* is
preserved over reboots and awakenings from sleep, but the mic input sound is
always muted despite the control still being set to On (unmute). Clicking mute
(Off), then unmute (On) restores mic input, as shown by the level meter
tracking input sounds.
However, Skype 8.59x and Zoom 5.0.3x cannot receive sound inputs
*despite* their sound level meters (in their respective sound
settings) registering changing input levels. The Skype test call does
not work. I opened a Zoom meeting with my wife on her Win 10 computer.
I could see and hear her, and she could see but not hear me.
On this dual-boot laptop, Skype 8.59x fails the test call under
Windows 10 Home.
The Sound Recorder app can successfully record mic input and play it
back. pavucontrol shows input on its level meter.
Notes:
+ ~$ /usr/bin/gnome-control-center sound input
(gnome-control-center:17284): sound-cc-panel-WARNING **: 16:48:28.795:
Couldn't find a stream
from the active input
+ Many days searching the internet and AskUbuntu have not produced a
solution that works. (For
what it is worth, many posters have reported that sound became
dysfunctional after upgrading
to 18.04 or 18.04.4.)
+ I have added the snd-cs46xx kernel module and firmware to get around
driver licensing issues
following the instructions at https://wiki.debian.org/snd-cs46xx, Debian
8.
+ I have added these lines to /etc/modprobe.d/alsa-base.conf :
options snd-hda-intel model=dell-vostro-2520
options snd-hda-intel dmic_detect=0
+ In PulseAudio Volume Control I have set the following:
Input Devices Port: Internal Microphone
Output Devices Port: Speakers
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 5.3.0-51.44~18.04.2-generic 5.3.18
Uname: Linux 5.3.0-51-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.14
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: hfinger 4047 F.... pulseaudio
/dev/snd/pcmC0D0c: hfinger 4047 F...m pulseaudio
/dev/snd/pcmC0D0p: hfinger 4047 F...m pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Sun May 3 16:52:35 2020
InstallationDate: Installed on 2020-04-15 (17 days ago)
InstallationMedia: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64
(20200203.1)
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Symptom_AlsaRecordingTest: ALSA recording test through plughw:PCH failed
Symptom_Card: Built-in Audio - HDA Intel PCH
Symptom_Jack: Mic, Internal
Symptom_Type: None of the above
Title: [Vostro 2520, Cirrus Logic CS4213, Mic, Internal] Recording problem
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/25/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A05
dmi.board.name: 0FWKV7
dmi.board.vendor: Dell Inc.
dmi.board.version: A05
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias:
dmi:bvnDellInc.:bvrA05:bd01/25/2013:svnDellInc.:pnVostro2520:pvrNotSpecified:rvnDellInc.:rn0FWKV7:rvrA05:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Vostro 2520
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.
mtime.conffile..etc.modprobe.d.alsa-base.conf: 2020-05-01T13:58:36.978996
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