Sound card not detecting

Install common Sound card drivers and needed packages in Ubuntu.

sudo apt-get install build-essential linux-headers-`uname -r` alsa-base alsa-firmware-loaders alsa-oss alsa-source alsa-tools alsa-tools-gui alsa-utils alsamixergui

I tried using this page on the Ubuntu wiki to upgrade alsa and it worked for me.

Following these instructions will give you the latest ALSA driver, but only for internal "HDA Intel" sound cards (if your computer is from 2005 or newer, you almost certainly have a "HDA Intel" sound card for handling internal speakers, headphone jacks and microphones). USB or Bluetooth sound will not be affected.

Make sure the dkms package is installed by running command:

sudo apt-get install dkms

Go to this page

You will find a table under the "Packages" heading. Look for the "Series" column and locate the package corresponding to your distribution series (Precise, Trusty, Xenial etc).

In the case of Trusty, you will find more than one package. Then check what kernel you're running with the "uname -r" command. If the output of uname -r starts with...

• 3.13 - use the oem-audio-hda-daily-dkms
• 3.16 - use the oem-audio-hda-daily-lts-utopic-dkms package
• 3.19 - use the oem-audio-hda-daily-lts-vivid-dkms package
• 4.2 - use the oem-audio-hda-daily-lts-wily-dkms package

Click the arrow (to the left) to expand the row of the selected package. Under the new section "Package files", click the file ending with .deb, download and install it:

You can either do this by selecting open with, which will take you to the Ubuntu Software Center, where you can click Install, or

Save the file to disk, open a terminal window, change to the right directory and execute sudo dpkg -i <file name>

Reboot.

I had the similar issue in Ubuntu 16.04 / Dell Inspiron 5559. Even my Bios was not detecting any Audio drivers.

I did tried to solve it by answers above but it did not worked. I tried to reinstall OS, but that did not worked too.

Finally I shut down my laptop and removed the Battery and restarted again. It worked.

But whenever I SUSPEND my Ubuntu, same issue occurs (neither Shutdown/Restart works). So everytime this problem occurs, I have to shut down & remove battery and audio works fine. Its a weird solution, i also don't know the reason behind it happening.