Front audio is not working on 16.04

I have Ubuntu 16.04 is installed on my computer. But front 5.1 mm audio is not working on 16.04. Although it was working perfectly when I was on 14.04. When I format and reinstalled 16.04 problem was started... Please help me anyone .

Solution 1:

ALSAMIXER SOLVED MY ISSUE !! MY HEADPHONE SOUND LEVEL WAS AT 0. AND NOW MY FRONT SOUND PANEL WORKING PERFECTLY ALRIGHT !!

Solution 2:

Was having the same problem. Installed the GNOME ALSA mixer via Ubuntu Software, unmute the headphone, increased the volume and front panel is working.

image here: GNOME ALSA mixer

Solution 3:

Had the same issue with Kubuntu 20.4, but with a microphone. Tried unmuting it on alsamixer but tht didn't quite solve the problem.
As it turned out, Pulse Audio wasn't identifying the front panel because of the audio controller profile, so i googled a little bit and found this post and was able to solve the problem. Here goes a TL;DR:

• First open up Pulse Audio Volume Control by typing in a terminal: pavucontrol (if you don't have it installed, just do a: sudo apt install pavucontrol)
• On the Configuration tab, change the audio controller device to Analog Stereo Duplex.
• Go to the desired input/output device tab, plug your device into the front panel and identify wether your device is recognized or not. If it isn't, then the next steps might not solve your problem.
• As changes made in Pulse Audio's GUI aren't permanent, we have to make them this way by editing a pulse audio config file.
• In a terminal, type sudo vim ~/.config/pulse/default.pa. If you are not familiar with vi or vim, replace it with a text editor you are familiar with.
• Append the following strings to the configuration file:

### Set Built-in Audio (HDA Intel) profile to Analog Stereo Duplex
set-card-profile 1 output:analog-stereo+input:analog-stereo

• Save the file, reboot and enjoy you system!