1

I'm getting no audio on my thinkpad t14 amd when i go to increase the audio it displays dummy audio which means my audio card isn't getting detected anyone have any fixes?

4 Answers4

2

I don't know why. But like 1 of 4 reboots i have sound. I try a lot of stuff to make it work, but at the end I just run

sudo alsa force-reload

every time I logged in and works.

I have the same machine in ubuntu 20.10 ( upgraded from 20.04 because y need the kernel 5.8 for HDMI support )

My uname

Linux vili 5.8.0-28-generic #30-Ubuntu SMP Thu Nov 5 13:24:33 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Guillermo Javier Caratti
  • 21
1

For me the following fix worked:

In /etc/pulse/default.pa , find this section :

### Automatically load driver modules depending on the hardware available
.ifexists module-udev-detect.so
load-module module-udev-detect
.else
### Use the static hardware detection module (for systems that lack udev support)
load-module module-detect
.endif

after this section add the following line:

load-module module-detect

save exit. after reboot, the sound issue should be fixed

I don't exactly know in depth details of what was causing this, but I tried almost all fixes given on all forum in the end only this worked.

I am using kernel 5.8, signed version from ubuntu repository

Hemant Zope
  • 11
1

This seems to be caused by a bug in the package libasound2:amd64 (1.2.2-2.1ubuntu2.1). [0] A temporarily workaround is to do the following:

sudo modprobe -r snd_rn_pci_acp3x
systemctl --user restart pulseaudio
sudo modprobe snd_rn_pci_acp3x [1]

You have to do it after every reboot. But you can put it in a shell script which you run on every login (automatically). Tested succesfully on a Thinkpad T14 AMD (Type 20UD-CT01WW), with kernel 5.8.0-28-generic.

To run those commands as a script at every login, put those three lines in a file. Copy this file into /etc/profile.d/. You'll need to allow the respective user or a specific group to run those modprobe-commands without a password-prompt. To do so, edit you sudoers-file: visudo or vim /etc/sudoers (or the editor of your choice). To allow a specific user to run the modprobe-command without a password-prompt, add at the very end of this file username ALL=NOPASSWD: /usr/sbin/modprobe -r snd_rn_pci_acp3x, /usr/sbin/modprobe snd_rn_pci_acp3x. Change username to your respective user. Or if you want to allow a specific group to run those commands without a password-prompt (i.e. users within the group sudo), add the same line but instead of username add %sudo.
I needed to add this line to my sudoers-file, otherwise I got stuck after the login (just got a black screen and nothing happened).

It seems there's already a fix for this in the testing-repository. [3]

[0] https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1901157
[1] https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1901157/comments/5
[2] https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1901157/comments/12

glootie
  • 11
  • Thank you, this is the only answer that worked for me! I did have to add this afterwards though: sudo alsa force-reload (this command did not work on its own) – user426293 Nov 16 '20 at 14:17
0

After clean installation Xubuntu 20.04 the sound works (also on live USB). After doing an upgrade (apt update + upgrade) the audio breaks... So I made new installation again and I am not going to perform any upgrade until there is a solution for this.

P.s. LCD brightness keys are working only after upgrading the kernel to 5.8

Kortas
  • 1