My Dell Laptop came with preinstalled Ubuntu 20.04.5 LTS. Everything was working fine for the last 3 months. I was using MS Teams Preview app for my office-related work. Both internal audio and microphone were working fine. Suddenly 3 days before my MSTeams output audio was not working so I had to use a microphone to talk with my colleagues. I thought maybe problem with the alsamixer, so I did some changes like increase and decrease in volume and all. It did not fix anything. So I did
$ sudo apt update
Some updates happened but still, output audio for MS Teams was not working. After i restart my laptop. When I did $ alsamixer
now it says: cannot open mixer: No such file or directory
When I went to check my sound in ubuntu settings. It's showing only dummy output as an output device. All options like internal-builtin audio, and microphone gone. Now I am really feeling helpless. I tried some of the article's suggestions from ask ubuntu and other platform but nothing seems to work.
A few important info about my ubuntu system:
$ lsb_release -a | grep Description
No LSB modules are available.
Description: Ubuntu 20.04.5 LTS
$ uname -a
Linux amit 5.14.0-1055-oem #62-Ubuntu SMP Wed Nov 30 04:54:03 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
$ sudo dmidecode -t 2 | grep "Manufacturer\|Product"
Manufacturer: Dell Inc.
Product Name: 0C6CYC
$ lspci -v | grep Audio
0000:00:1f.3 Audio device: Intel Corporation Device 51c8 (rev 01) (prog-if 80)
But when I do $ cat /proc/asound/cards It says: -- no soundcards ---
$ alsa-info
ALSA Information Script v 0.4.64
--------------------------------
This script visits the following commands/files to collect diagnostic
information about your ALSA installation and sound related hardware.
dmesg
lspci
aplay
amixer
alsactl
/proc/asound/
/sys/class/sound/
~/.asoundrc (etc.)
See '/usr/sbin/alsa-info --help' for command line options.
Newer version detected: 0.5.1
To view the ChangeLog, please visit http://www.alsa-project.org/alsa-info.sh.changelog
ALSA-Info script has been downloaded /tmp/alsa-info.JX0noFz2n5.
Please, re-run it from new location.
When I try to list cards, it display nothing
$ pactl list cards
I am new to Linux. I will be really grateful for your suggestions. Thank you
