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Ok, yesterday the sound worked great, both the internal speakers and my headphones. But today it doesn't work at all. I cant find out what the problem is, I tried with rebooting the system and log in and out. My sound card is a ATI sound card, and the speakers are RV710 i think. I would be really glad if I could get some help. If it matters i use Ubuntu 11.10

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As you happen to know your Hardware why don't you give this a try?

Click on the volume icon and go to sound preferences. Under the hardware tab, select the correct hardware in case it has changed.

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Under the output tab select the same thing you selected in the hardware tab.

enter image description here

Lastly see if anything is muted. If so un-mute it. :)

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Once U've selected the right Hardware, use the 'Test Speakers' Option to test if u are getting any sound. If you don't hear anything U haven't selected the right one. – Bhargav Nov 5 '11 at 10:32
If none of these work.. give this Wiki page a read – Bhargav Nov 5 '11 at 12:44
Oh the speaker was mute, I'm feeling quite stupid, but anyway thanks really much for the help! :D – Kalle R Nov 5 '11 at 17:48
It Happens.. :) – Bhargav Nov 6 '11 at 5:10
I have made the above changes as well, and I get sound, but upon reboot, all the settings revert to the "internal audio" default. It still doesn't save the changes I make. – user71103 Jun 16 '12 at 23:43

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