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Found out that the headset I was using isn't fully supported by ubuntu. If I used the volume controls on the headset, then the volume was screwed until I restarted the computer.


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Having the same problem. I can correct it with the alsa mixer, but it reverts as soon as I unplug/plug back in the audio jack To make Audio jack have an output I actually have to turn up the SPEAKER output on the Alsa mixer


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This is a temporary solution that works for me: In Terminal type alsamixer, there is a volume bar for headphone. Switch in on by pressing M


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I had the same problem on Dell Inspiron 3542 running Ubuntu 14.04.2 The problems appears to be in the audio powersave feature. The noise stops when I open the sound settings, or when I play audio/video. The noise starts again when I stop playing audio/video and close sound settings. This solution worked for me: Edit the file $ sudo nano ...


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In Alsa mixer, under "Auto Mute" tab change the selection to "Line out" It must have been "Disabled" before. Worked for me.



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