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sudo add-apt-repository ppa:ubuntu-audio-dev/ppa

sudo apt-get update

sudo apt-get install linux-alsa-driver-modules-$(uname -r)

sudo vim /etc/modprobe.d/alsa-base.conf

 

and all following line: options snd-hda-intel model=laptop

 

sudo init 6

sudo vim /etc/modprobe.d/alsa-base.conf

 

and replace model=laptop to model=auto in added line so that it will look like : options snd-hda-intel model=auto

 

I don't know why this works like this only but in this way only it works.

 

sudo reboot

 

And its done... :-/