If all you did was follow the procedure in that link, then you should be able to just edit the /etc/modprobe.d/alsa-base.conf file, remove the entry you added, and reboot.
Originally Posted by akhil520c
You might also want to try this entry in that file instead:
Reference link: http://www.linlap.com/wiki/toshiba+satellite+c655d
options snd-hda-intel model=ideapad
EDIT: If still no luck, try running the following command from a terminal window:
...choose the upload option and post back the link provided.
wget http://www.alsa-project.org/alsa-info.sh -O alsa-info.sh && bash alsa-info.sh