Headphones stopped working.
 

I have a Toshiba Satellite C55-A5302 laptop with Linuxmint 17 running LMDE 64 bit. The headphones stopped working after unplugging them. Until then everything was working. Now when I plug the headphones in the sound keeps coming from the laptop speakers and does not switch to the headphones. The headphones work on another Lenovo laptop running Linuxmint 16. I have tried rebooting both with and without headphones but the sound always comes through the laptop speakers. I checked the sound settings but I did not find anything relevant. Anyone have any suggestions?

Try running alsamixer, and go right until you see a bar labeled as "auto-mute". You want to enable that, you can press up/down to toggle it.

That should fix the headphone issue in most cases.

No Auto-Mute
 

I ran alsamixer but I could not find an auto-mute function. Am I missing something? Thank you.

That's the default mixer, what you want to do is press F6 and choose your sound card. Then, you should see a whole list of audio sliders.

Auto mute was enabled
 

Thank you for your help. Auto mute was enabled. I don't know how to read Alsamixer and will look for some directions because it looks like the mic is disabled.

Glad I could help! :)

Solved.
 

User error. Jacks are in same place on Lenovo and Toshiba except the mic and headphone jacks are reversed. I am used to using the Lenovo and when I switched to the Toshiba I plugged the headphone plug into the mic jack. I hate to admit it but maybe it will help someone else.