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My audio is no longer working in Xubuntu 12.04 after working fine for about a year. This happened right after visiting the following website and installing an audio browser application to upload voice samples for the creation of an open-source speech recognition program:

I do not know if that is what caused the problem, but audio stopped working around the same time I installed this web application.

When I type in the terminal

pulseaudio -D

I get the following:

E: [pulseaudio] main.c: Daemon startup failed.

I tried the following next:

sudo apt-get purge pulseaudio
sudo apt-get install pulseaudio

When I type 'pulseaudio' at the command prompt, I get:

E: [pulseaudio] pid.c: Daemon already running.
E: [pulseaudio] main.c: pa_pid_file_create() failed.
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Look in /var/log/syslog for anything related to pulseaudio and dbus. If you find error messages related to that please post some of the most recent ones. – Karl Frisk Sep 26 '12 at 16:43
Content of syslog for pulseaudio: MACHINE pulseaudio[3801]: [pulseaudio] main.c: Using state directory /home/USER/.pulse. MACHINE pulseaudio[3801]: [pulseaudio] main.c: Using modules directory /usr/lib/pulse-1.1/modules. MACHINE pulseaudio[3801]: [pulseaudio] main.c: Running in system mode: no MACHINE pulseaudio[3801]: [pulseaudio] pid.c: Daemon already running. MACHINE pulseaudio[3810]: [pulseaudio] pid.c: Daemon already running. MACHINE pulseaudio[3810]: [pulseaudio] main.c: pa_pid_file_create() failed. – lkamal Apr 18 '14 at 8:53

This happened to me too. I think the primary reason is the pulseaudio daemon isn't killed properly.

First run pulseaudio --kill then pulseaudio --start.

This fixed the problem for me.

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I fixed my own problem by simply entering "alsamixer" at the commandline and playing with some of the settings such as unmuting various volume controls for different components and that solved the problem. Probably the software at muted some volume controls on my computer and failed to unmute them afterwards. Thanks for the help, everyone!

So, my solution was:


and unmute various volume controls until the sound comes back. Also try switching between soundcards with F6. (It's helpful to have a youtube video playing in the background, or some music on a playlist playing so you know when the sound is finally back.)

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You may try to delete or rename the .pulse directory in your homefolder, logout and relogin.A new .pulse-directory will be created automatically by pulse, so most likely youll get a useful configuration. This has helped me in many times when i got problems with pulse.

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hmmm.. well I tried renaming the .pulse file and a new .pulse file was indeed created after restarting my system. Unfortunately my computer is still completely silent. Are there any sound drivers to remove and reinstall or anything like that? – Ben Sep 13 '12 at 22:03

This is an update for 13.10.

I used pavucontrol:

sudo apt-get install pavucontrol
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I plugged in some headphones and then did:

pulseaudio --kill


pulseaudio --start

This fixed it for me! The other fix is:

I used pavucontrol:

sudo apt-get install pavucontrol

Please VOTE UP if this worked!

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This worked for me

sudo /usr/bin/amixer set Master toggle

I tried all the other things suggested in this thread, and nothing worked.

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