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I just ran sudo apt-get update && sudo apt-get upgrade and suddenly there was no sound.

I rebooted and I heard the bios boot sound but when Ubuntu boots there is no sound. I followed instructions on this post but when I uninstall alsa-base I couldn't install it back and apt says there is no install candidate :

Package alsa-base is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'alsa-base' has no installation candidate

I tried to do this but it doesn't work, apt just gets 404 on that repo.

Now I can't even get to the System settings page since alsa-base was uninstalled.

Any suggestions?

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I cannot give you an answer, but we are many to have the same problem for the last 24h after upgrading from pulseaudio 3 to 3.1. To confirm that this is the same issue, run in a terminal

grep pulse /var/log/apt/history.log

If you obtain something like

Upgrade: libpulsedsp:amd64 (1:8.0-0ubuntu3, 1:8.0-0ubuntu3.1), pulseaudio:amd64 (1:8.0-0ubuntu3, 1:8.0-0ubuntu3.1), libpulse0:amd64 (1:8.0-0ubuntu3, 1:8.0-0ubuntu3.1), libpulse-mainloop-glib0:amd64 (1:8.0-0ubuntu3, 1:8.0-0ubuntu3.1), pulseaudio-module-x11:amd64 (1:8.0-0ubuntu3, 1:8.0-0ubuntu3.1), pulseaudio-module-bluetooth:amd64 (1:8.0-0ubuntu3, 1:8.0-0ubuntu3.1), pulseaudio-utils:amd64 (1:8.0-0ubuntu3, 1:8.0-0ubuntu3.1)

please go on this link and report that this bug is affecting you as well to increase the priority.

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  • Ok i flagged this issue as affecting me also. but the problem still remains that now i don't havealsa-base installed. since i removed it, apt-get cant find the package anymore. – Itamar Gronich Nov 24 '16 at 6:58
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The following procedure worked for me:

1 purge the package

sudo apt purge libpulsedsp pulseaudio libpulse0 libpulse-mainloop-glib0 pulseaudio-module-x11 pulseaudio-module-bluetooth pulseaudio-utils

2 keep track of the additional removed packages, in my case

checkbox-converged checkbox-gui gdm3 gnome-control-center gnome-orca gnome-session gnome-settings-daemon gnome-shell gstreamer1.0-plugins-bad gstreamer1.0-pulseaudio indicator-bluetooth indicator-sound libasound2-plugins libcanberra-pulse libespeak1 libfluidsynth1 libfreerdp-plugins-standard liboxideqt-qmlplugin liboxideqtcore0 liboxideqtquick0 libqt5feedback5 libqt5multimedia5 libsdl-image1.2 libsdl1.2debian libunity-webapps0 qml-module-qtfeedback qml-module-ubuntu-components qml-module-ubuntu-test qml-module-ubuntu-web qtdeclarative5-ubuntu-ui-toolkit-plugin speech-dispatcher speech-dispatcher-audio-plugins ubuntu-desktop ubuntu-session unity-control-center unity-control-center-signon unity-settings-daemon unity-webapps-common unity-webapps-qml unity-webapps-service vlc webapp-container webbrowser-app

3 reinstall the packages, with the pulseaudio one to the previous version

sudo apt install libpulsedsp=1:8.0-0ubuntu3 pulseaudio=1:8.0-0ubuntu3 libpulse0=1:8.0-0ubuntu3 libpulse-mainloop-glib0=1:8.0-0ubuntu3 pulseaudio-module-x11=1:8.0-0ubuntu3 pulseaudio-module-bluetooth=1:8.0-0ubuntu3 pulseaudio-utils=1:8.0-0ubuntu3 checkbox-converged checkbox-gui gdm3 gnome-control-center gnome-orca gnome-session gnome-settings-daemon gnome-shell gstreamer1.0-plugins-bad gstreamer1.0-pulseaudio indicator-bluetooth indicator-sound libasound2-plugins libcanberra-pulse libespeak1 libfluidsynth1 libfreerdp-plugins-standard liboxideqt-qmlplugin liboxideqtcore0 liboxideqtquick0 libqt5feedback5 libqt5multimedia5 libsdl-image1.2 libsdl1.2debian libunity-webapps0 qml-module-qtfeedback qml-module-ubuntu-components qml-module-ubuntu-test qml-module-ubuntu-web qtdeclarative5-ubuntu-ui-toolkit-plugin speech-dispatcher speech-dispatcher-audio-plugins ubuntu-desktop ubuntu-session unity-control-center unity-control-center-signon unity-settings-daemon unity-webapps-common unity-webapps-qml unity-webapps-service vlc webapp-container webbrowser-app

4 Remove the user config file

rm -r ~/.config/pulse/*

5 Shutdown the computer then turn it on again (don't reboot).

6 Enjoy sound again :)

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  • what do you mean by keep track? – Itamar Gronich Nov 24 '16 at 14:24
  • I meant copy the list of packages that will be removed. You will find the list below The following packages will be REMOVED: when you purge the package with the first command. Don't forget to exclude the seven packages of item #1 from this list. On item #3 copy/paste this list after sudo apt install libpulsedsp=1:8.0-0ubuntu3 pulseaudio=1:8.0-0ubuntu3 libpulse0=1:8.0-0ubuntu3 libpulse-mainloop-glib0=1:8.0-0ubuntu3 pulseaudio-module-x11=1:8.0-0ubuntu3 pulseaudio-module-bluetooth=1:8.0-0ubuntu3 pulseaudio-utils=1:8.0-0ubuntu3. – Clèm Nov 25 '16 at 0:03

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