When I connect headphones to laptop with 13.10 I hear sound from speakers and from headphones at same time. How to fix this? 64bit, lenovo y570
It may not change the settings automatically.
Try going to "Sound Settings" -> "Output" and choose the device you want to output to. It solved my problem with an HP USB headphones.
Probably, your Headphone Jack Sense is turned off..
This should turn on your Headphone Jack Sense.