When I plug my headphones into my laptop, for some reason they have started showing up under recording devices instead of playback devices, and no sound comes out of them. When I plug my headphones in and try to play music, the little bar that shows the audio level next to the device moves up and down as if audio is coming out of it, but they are silent.
I'm using an Asus Zenbook UX31E with 64bit Windows 7. I've had this laptop for a year and a half with no problems. The sound works fine coming from the computer speakers, but not the headphones. I have tried they "show disabled devices" trick, nothing (they are showing up, but under recording devices instead). I am not plugging the headphones into the wrong jack (there is only one audio-out jack, no audio-in). My audio is not muted. The headphones work fine with other devices. It's not a hardware problem, because I also have Ubuntu 13.04 installed and headphones work fine there. I have updated my drivers. This only started a day or 2 ago, and it is intermittent; yesterday headphones didn't work, this morning they did, now they don't again.
Any idea what's happening here?