Headphone jack not working?

I've tried all these responses. Here is the ONLY way that worked for me (and it was remarkably quick... after spending hours on all the other suggestions!). Go into Terminal, and simply key this in:

$ alsactl restore

And that's that! :)

I had the same problem. Following these instructions got my headphones working.

Open the terminal and enter the following commands:

cd /usr/share/pulseaudio/alsa-mixer/paths/
sudo cp analog-output-headphones.conf analog-output-headphones.bak
sudo nano analog-output-headphones.conf

Look for the section called [Element Speaker] and change it so that it looks like this:

[Element Speaker]
switch = on
volume = ignore

Save the changes and exit nano.

Create a backup of the corrected analog-output-headphones.conf:

sudo cp analog-output-headphones.conf analog-output-headphones.fixed

Now you can restore the fix if a future installation or update overwrites it.

Reboot.

After rebooting, you may need to remove and reinsert the headphone plug to get it to work. After it's working, though, you will be able to remove and insert the plug, and behavior will be as expected.

Finally got Headphones to work ! Follow this ----- (Dell)

This is it :

Run the following command into the Terminal:

gksudo gedit /etc/modprobe.d/alsa-base.conf

Scroll down and add these lines to the end of the file:

# Keep snd-pcsp from being loaded as first soundcard
options snd-pcsp index=-2
alias snd-card-0 snd-hda-intel
alias sound-slot-0 snd-hda-intel
options snd-hda-intel model=dell-m6-amic

Then, save , reboot and test sound using headphones and speakers.