No sound from front headphone jack on D3100

[whataguywants]

I'm getting no sound from the front headphone jack when I plug my headphones in. I get sound if I plug my headphones into the rear audio jack. Is my D3100 faulty?
My normal setup is a monitor and tv plugged into the 2 rear hdmi sockets and pc stereo speakers plugged into the rear audio jack. My laptop is a Dell Inspiron 7559.

[AlbanRampon]

Hello,

It unfortunately sounds like it.
The way Dell designed it is that the front jack will disable audio on DisplayPort and both HDMI outputs keeping the line out running. They call it headphone privacy.
The driver on your computer does not have an influence on which input is activated. If you have the sound on the back, it means the sound is routed correctly from the computer to the dock as this is a single source.

Kind regards,
Alban