can't hear any sound from music or video sites

Asked by j singleton

While using Youtube or music sites can no longer hear any sound. The speakers are on and the computer makes sound when notifying. Help.

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Ubuntu firefox-3.5 Edit question
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marcobra (Marco Braida) (marcobra) said :

Please first enable the universe repository:

Open System → Administration → Software sources → [ Tab Ubuntu software ]
enable "Community Maintained open source software (universe)"
Close and confirm the repository reload.

Then open a Terminal from the menu Applications → Accessories → Terminal and type:

sudo aptitude update
sudo apt-get dist-upgrade
sudo aptitude install gnome-alsamixer

give your user password when requested, you don't see nothing when you type it, then press enter.

Then try to run gnome-alsamixer from menu Applications→Sound & Video GNOME Alsa Mixer

unmute and raise to a non zero values and retry.

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inashdeen (inashdeen) said :

tries this too
applications, ubuntu software center.
type ubuntu restricted extras, install that
and also
this, flash player, download the .9.04 version:
and try to get extensions for mozilla or chrome, whichever u r using

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oocevin (ccct007) said :

Terminal and try this
sudo aptitude install gsfonts gsfonts-x11 flashplugin-nonfree

Plus this happened to me, check your volume.

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