http://i.imgur.com/ip6zwes.png http://i.imgur.com/ip6zwes.png On Linux you can choose different behavior; so it's apparently software. At least, on machines I

http://i.imgur.com/ip6zwes.png http://i.imgur.com/ip6zwes.png On Linux you can choose different behavior; so it's apparently software. At least, on machines I've worked on. Depending on that dropdown, I can plug in headphones and the built-in speakers will continue to output.