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Hi I have a problem with my sound with Ubuntu it just stopped play sounds out of no where today and i don't know why. It can play sounds out of the headphone jack still. I'm running Ubuntu on a Dell Latitude D620 please help. thanks!

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Maybe a hardware issue? Does the laptop have a switch to mute the speakers or something? – Jazz Jul 21 '12 at 23:03
no there isn't a button or a switch only one for the wifi – Tyler Jul 21 '12 at 23:15
Something similar happened to me. Go to "System Settings" > "Sound" select analog output instead of digital. "Test Sound" and let us know if it worked for you. – Brandon Bertelsen Jul 22 '12 at 2:43

Run the terminal command alsamixer.

Adjust the settings with cursor keys/ arrows.

This should work.

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