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On 07/12/2015 07:57 PM, E. Liddell wrote:
> Invoke alsamixer from the command line and check to make sure that nothing's muted and it's pointing at the right
> soundcard--don't ask me why, but ALSA sometimes sets everything up muted, and it isn't unusual for an HD audio
> device to register as *two* devices, only one of which works.
> 
> E. Liddell

Yes, also have similar problems from time to time with ALSA, especially when moving from one computer to another.
Cheers
  Michele
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