It seems like alsa is not recognizing your soundcard model. I had the
same problems on both my systems and solved them with the instructions
on the page below:

https://help.ubuntu.com/community/HdaIntelSoundHowto#line-81

In short you need to specify your soundcard model manually.

Hope this helps :-)

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No audio after hibernation
https://bugs.launchpad.net/bugs/223457
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