Solution:

You need to edit this file /etc/modprobe.d/alsa-base.conf and then add a line in its end. Use the following commands:
sudo gedit /etc/modprobe.d/alsa-base.conf

Now add the following line at its end:
options snd-hda-intel model=generic

Now reboot your computer. It should solve your problem. If the solution doesn’t work then try the Further Troubleshoot.
Further Troubleshoot:

The term model = generic may not work in all the cases as sometimes it depends on the model of your sound card. Find your sound card here.

You can try replacing the word generic by the following words depending upon your laptop:

Acer
options snd-hda-intel model=ACER

Asus F3J
options snd-hda-intel model=uniwill-m31

Dell 6400 laptop
options snd-hda-intel model=dell

Dell Inspiron
options snd-hda-intel model=ref

Dell Dimension 9150
options snd-hda-intel model=ref

Fujitsu Siemens Amilo XI 1526
options snd-hda-intel model=fujitsu

Gateway laptops with a sigmatel audio device
options snd-hda-intel probe_mask=1

or
options snd-hda-intel model=test enable-msi=1 probe-mask=1

Lenovo:
options snd-hda-intel model=laptop-eapd

LG P1 Express Dual (ALC880 chip)
options snd-hda-intel model=lg

LG P1 with CMI9880 chip
options snd-hda-intel model=minimal

Toshiba Satellite a135-s2386
options snd-hda-intel probe_mask=8 model=3stack

Toshiba Tecra A8-103
options snd-hda-intel probe_mask=8 model=fujitsu

or
options snd-hda-intel probe_mask=8 model=fujitsu