Anybody here have the Dv 7 Pavilion and have headphone probs?

this ones kinda frustrating me. for some reason when i plug my headphones into either of the front jacks, the sound still comes fromt he internal speakers. now when i do an audio test on the headphones i can hear the testing sounds through the headphones but when i try and game, the sounds comes through the headphones for a bit then automaticly switches back to the internal speakers.
anybody got any idea whats going on and/or how to fix the issue.

anyone? anyone at all :/

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