no sound at all

[L_d_v_c@]

Hi,
the computer is Winnovo v113 and there isn't sound at all.

 lsb_release -rd
Description: Ubuntu Artful Aardvark (development branch)
Release: 17.10
ludovic@ludovic-Winnovo-V113:~$

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: alsamixergui 0.9.0rc2-1-10
ProcVersionSignature: Ubuntu 4.10.0-26.30-generic 4.10.17
Uname: Linux 4.10.0-26-generic x86_64
ApportVersion: 2.20.5-0ubuntu5
Architecture: amd64
CurrentDesktop: XFCE
Date: Sun Jul 9 18:25:07 2017
InstallationDate: Installed on 2017-07-08 (1 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: alsamixergui
UpgradeStatus: Upgraded to artful on 2017-07-09 (0 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[3vi1 (launchpad-net-eternaldusk)]

It looks like a recent package update may have broken pulse on artful, as I too am seeing this on my previously working artful installation. I hadn't rebooted in a week or three, so I can't say exactly which package broke it.

I can tell you how I fixed it, though:

aplay -l and other things showed that the sound devices were in fact being seen by the system, it seemed that it might be a pulseaudio issue. Looking closer, I found the following in syslog...

-----------
Jul 13 08:25:15 sager pulseaudio[28983]: E: [pulseaudio] module.c: Module "module-switch-on-connect" should be loaded once at most. Refusing to load.
Jul 13 08:25:15 sager pulseaudio[28983]: E: [pulseaudio] main.c: Module load failed.
Jul 13 08:25:15 sager pulseaudio[28983]: E: [pulseaudio] main.c: Failed to initialize daemon.
Jul 13 08:25:15 sager systemd[8923]: pulseaudio.service: Main process exited, code=exited, status=1/FAILURE
Jul 13 08:25:15 sager systemd[8923]: Failed to start Sound Service.
-----------

I don't know that much about pulse config/internals, but digging around I found a reference to that module in /etc/pulse/default.pa.

I commented out the second to the last line, where it tries to load module-switch-on-connect, and then was able to restart pulse audio (systemctl --user start pulseaudio) and all of my sound devices were found and are now working accordingly.

[L_d_v_c@ (l-d-v-c)]

Hi,
It is not the same problem.
Here, aplay -l return that sound card was not found.

[Alessandro Polverini (polve)]

Thanks 3vi1 for the workaround!

That solved the problem for me.