No sound in Headphones but laptop Speakers working

I have openSUSE 13.1 KDE installed on my Asus K55VM laptop.
Till yesterday everything was working fine but this morning when I started my laptop there was no sound in Headphones.
But if I unplug the headphones then the laptop speakers were working fine.

PS: I have checked the headphones on another machine, no problem with headphones. I have checked with various headphones and the problem persists.

Did you have a recent update?

Here are solutions to some common sound problems on your computer. These solutions can also help if you don’t hear any sound coming from your speakers or headphones, or if there’s a problem with the sound you do hear. For a step-by-step tutorial to help you identify and fix common sound problems