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I just installed Ubuntu today. I'm testing everything out and it seems pretty cool so far. There's just one big problem. The audio suddenly stopped working. It worked just fine when I first installed the system, but it has stopped for no reason that I can determine.

I don't like to use proprietary software (though I will if I have to), so I removed these packages: firmware-crystalhd nvidia-libopencl1-331-updates nvidia-opencl-icd-331-updates. But they don't appear to be the problem, because reinstalling them didn't fix the problem.

I checked alsamixer, and it looks rather different from what I'm used to: http://i.stack.imgur.com/qF6iW.png

The "Sound" settings in the system settings aren't too helpful, but here's another screenshot just in case: http://i.imgur.com/W65OLMd.png I can't move the slider, and there's no sound devices listed.

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  • In alsamixer, you see HDMI soundcard, (press F6 to access the 2nd soundcard) .
  • If soundcard order has changed, install pavucontrol (pulseaudio volume control) , go to "output device tab" and set 2nd soundcard as default with green button.
  • This doesn't work. The "output devices" tab doesn't list any output devices. If I play audio, there's a "dummy output" device, but no sound plays. – EMBLEM Nov 17 '14 at 16:55
  • In alsamixer, do you see 2 soundcard pressing F6 ? what is the result of this command `aplay -l`` – laugeo Nov 17 '14 at 18:35
  • Yes, I do see 2 soundcards pressing F6: "HDA Intel HDMI" and "HDA Intel PCH". $ aplay -l outputs this: privatepaste.com/63ee9d659d – EMBLEM Nov 18 '14 at 0:59
  • So alsa layer is ok : try to reset pulseaudio config like askubuntu.com/questions/475450/… ( the first answer) – laugeo Nov 18 '14 at 8:21
  • Never mind, I gave up and reinstalled the system, and it all works okay. – EMBLEM Nov 18 '14 at 17:09

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