No sound after update to 20.04 "Dummy Output"

Question

I lost sound after updating from 19.10 to 20.04.

My sound driver appears to have been replaced with dummy output, see below

No other output devices are available. I have rebooted and the problem remains.

Sorry, I don't understand. How do I use pavucontrol? And what should I be asking dmesg? — Mittenchops, May 09 '20 at 14:55
In terminal install it by sudo apt install pavucontrol and thereafter run it by the same name. — jarno, May 09 '20 at 14:59
Try dmesg | grep -iE 'sound|audio' and cat /var/log/syslog | grep -iE 'sound|audio' and maybe you see something helpful in their output. — jarno, May 09 '20 at 15:19
pavucontrol also shows that the only audio device I have is dummy output. — Mittenchops, May 09 '20 at 16:25
Can you run lspci | grep -i audio and reply back what you see? — DanglingPointer, May 19 '20 at 06:56
Please, also edit the question to post the output of inxi -A. — Olimjon, May 25 '20 at 12:24
Does this answer your question? 20.04: internal speaker (Audio) is not working in Ubuntu 20.04 LTS after upgrading from Ubuntu 18.04 LTS — Janus Troelsen, Jun 26 '20 at 03:11
Does this answer your question? Ubuntu 20.04 "Dummy output" No sound card in use — Kulfy, Jun 28 '20 at 18:33
Package 'timidity-daemon' is not installed, so not removed — Mittenchops, Jun 29 '20 at 04:56
No, this is still a problem, and the answers suggested do not fix it. Reloading alsa does fix it temporarily, but the problem returns frequently. — Mittenchops, Jun 29 '20 at 04:58
I had a similar problem after doing an "apt update" on Ubuntu 20.04. I found that just killing Pulseaudio fixed it when it respawned. Not sure if this is a one off, but the comment may be useful to others. — davidgo, Apr 27 '21 at 06:49
https://askubuntu.com/questions/1258510/only-dummy-output-sound-in-ubuntu-20-04-after-reboot-broken-driver-modul — sancho.s ReinstateMonicaCellio, Oct 18 '21 at 13:16

Raffa · Answer 1 · 2021-06-18T17:32:25.653

I would first suggest rebuilding new pulseaudio configuration for your user account. This might, in most cases, fix the problem or at least rule out issues related to pulseaudio configuration.

Old pulseaudio configuration files can sometimes conflict with newer versions of pulseaudio after package or system upgrades. To fix this, please follow the steps below:

Back up ~/.config/pulse/ configuration directory to ~/.config/pulse_old/ by running the following command in the terminal:
```
mv  ~/.config/pulse/ ~/.config/pulse_old/
```
After that, please reboot your system to build new pulseaudio configuration files. A new ~/.config/pulse/ directory will be created automatically.
Test your audio now.

If, somehow, after applying this fix you decide to go back to the previous state before applying the fix, please follow the steps below:

Run the following command in the terminal:
```
rm -r  ~/.config/pulse/
```

Run the following command in the terminal:

mv  ~/.config/pulse_old/ ~/.config/pulse/

Reboot your system.

However, if all is okay and the problem is fixed, you can remove the backed up old configuration directory ~/.config/pulse_old/ to free space ( if you wish ) by running the following command in the terminal:

rm -r  ~/.config/pulse_old/

I was having a similar issue on Ubuntu 20.04. Deleting the folder ~/.config/pulse/ and restarting the system worked. — Henrique Ferrolho, Feb 26 '21 at 15:28

score 3 · Answer 2 · answered May 24 '20 at 14:07

I have found a similar problem in a different thread, you might want to try this:

It also happened to me a couple of times, though I can't remember if rebooting used to solve my problem... Anyway I found the following line to be helpful:

pulseaudio -k && sudo alsa force-reload

I can't find the original thread with the solution and explanation, but it's practically shutting/killing the deamon and forcing alsa to reload.

score 2 · Answer 3 · answered May 22 '20 at 13:50

I faced the same issue, you can follow steps mentioned in the answer of this question. If the link doesn't work just do this.

Open your terminal and after that:

sudo vim /etc/default/grub
Find GRUB_CMDLINE_LINUX_DEFAULT and add snd_hda_intel.dmic_detect=0 to the end of it. (ex: GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 snd_hda_intel.dmic_detect=0")
run sudo grub-mkconfig -o /boot/grub/grub.cfg
reboot your system

score 1 · Answer 4 · answered Jun 06 '21 at 12:04

My solution is a mixed several threads: this thread and that, another one and latest:

# Edit backlist kernel:
echo "blacklist snd_soc_skl" >> /etc/modprobe.d/backlist.conf
Edit alsa options
echo "snd-hda-intel model=generic" >>  /etc/modprobe.d/alsa-base.conf
Edit /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash loglevel=3 snd_hda_intel.dmic_detect=0"
Reinstall alsa-base and pulseaudio
apt-get install --reinstall alsa-base pulseaudio
alsa force-reload
Purge timidity
apt purge timidity-daemon
Some trick: https://askubuntu.com/a/1249071/756376
sudo setfacl -m u:$USER:rw /dev/snd/*

No sound after update to 20.04 "Dummy Output"

4 Answers4

Edit alsa options

Edit /etc/default/grub

Reinstall alsa-base and pulseaudio

Purge timidity

Some trick: https://askubuntu.com/a/1249071/756376

Linked