Daniel as instructed by you.
remove the options snd-hda-intel model=auto and replace it with: options 
snd-hda-intel enable_msi=1
I got sound back and still sound recording issue. cannot see now Microphone1 on 
Sound preferences Input tab connector.

Here is the update alsa info output:
http://www.alsa-project.org/db/?f=430793b22a7160a92e8689e79e250544d4247dad

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Internal microphone doesn't work - Vostro Notebook 2510 - Intel HDA ALC268
https://bugs.launchpad.net/bugs/555978
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