resinstalled alsa
sudo apt-get update;sudo apt-get dist-upgrade; sudo apt-get install pavucontrol 
linux-sound-base alsa-base alsa-utils lightdm ubuntu-desktop  
linux-image-`uname -r` libasound2; sudo apt-get -y --reinstall install 
linux-sound-base alsa-base alsa-utils lightdm ubuntu-desktop  
linux-image-`uname -r` libasound2; killall pulseaudio; rm -r ~/.pulse*; 
ubuntu-support-status; sudo usermod -aG `cat /etc/group | grep -e '^pulse:' -e 
'^audio:' -e '^pulse-access:' -e '^pulse-rt:' -e '^video:' | awk -F: '{print 
$1}' | tr '\n' ',' | sed 's:,$::g'` `whoami`

and then run:
python run.py /proc/asound/card0/codec#2
Got the attached HD Analyser
 

As I can see PIN Blue LinIN

widget control is IN Out shall I uncheck the Out?


** Attachment added: "Screenshot from 2016-03-01 14:12:06.png"
   
https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1540372/+attachment/4585431/+files/Screenshot%20from%202016-03-01%2014%3A12%3A06.png

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https://bugs.launchpad.net/bugs/1540372

Title:
  [Intel DP35DP, SigmaTel STAC9271D, Green Speaker, Rear] Underruns,
  dropouts or crackling sound

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