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I am running Xubuntu 12.10 and I was trying to repair the sound on the headphone jack since I had sound output through there and now I have no sound what so ever. So I think I made things worst. No sound through the speakers and no sound through the headphone. I know I did something wrong but I don't know what I did. I have pulseaudio. If I could at least get the speakers working again I'll be happy. Any help will be highly appreciated!

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see this post, this has happened on my toshiba more than once so make a backup of this file… – mchid Jun 15 '14 at 5:09
im having the same issue. help please – Joshua Robison Feb 1 '15 at 6:04

Try this - Navigate to this menu - settings-> sound -> output & try different options under play sound through. You can use Test sound button to check if choosing any of those options work for you.

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I don't even have the sound option in settings. No icon, nothing! weird? – MoRent Mar 31 '14 at 4:44
In your taskbar, there should be a speaker like icon. Click on it & the last option should be sound settings. – mindreader Mar 31 '14 at 4:48
I tried that already, thanks but no luck. I remember that I killed pulseaudio in the command. How can I un-kill it if that makes sense. Also, when I use mixxx dj mixer software I get sound from that. – MoRent Mar 31 '14 at 11:42
Did u try restarting ur system? – mindreader Mar 31 '14 at 12:41
Yes several time. What do you think about when I entering the command to "pulseaudio -kill". You think that is causing it? – MoRent Mar 31 '14 at 12:54

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