Lubuntu 14.04 no sound, can't install pulseaudio

I have two PCs I've installed LUbuntu 14.04 on. On one sound is fine and pulseaudio was installed during the OS installation. On the other pulseaudio is missing, and there is no sound at all, not from audio jack nor from HDMI. When typing sudo apt-get install pulseaudio I get this error:

Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies: pulseaudio : Depends: libpulse0 (= 1:4.0-0ubuntu11) but 1:4.0-0ubuntu11.1 is to be installed Recommends: pulseaudio-module-x11 but it is not going to be installed Recommends: gstreamer0.10-pulseaudio but it is not going to be installed Recommends: rtkit but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

2 Answers

You try to install the pulseaudio (1:4.0-0ubuntu11) from the trusty repositories. But you have enabled trusty-updates, therefore libpulse0 (1:4.0-0ubuntu11.1) is to be installed.

The only explanation is that you have forgotten to start the command

sudo apt-get update

After that

sudo apt-get install --reinstall pulseaudio

and to upgrade the whole system

sudo apt-get dist-upgrade

Try this:

sudo apt-get remove libpulse0
sudo apt-get autoremove

And then try to install pulseaudio

sudo apt-get install pulseaudio

I had the same issue, but this helped for me.