Sound coming from both laptop speakers and headphones

Hi, I have a problem where my laptop doesn't recognise whether my headphones are plugged in (even though they clearly are and and sound is coming out of them). (Screen shot from "Sound": I'm using a HP Pavillion g6. I have recently tried to update the driver to no avail. This also happens with any headphones I use which work on other devices. All the answers I've seen so far haven't helped. Thanks for any help!