Having tried on multiple occasions to follow the instructions in other threads and getting nowhere I make this post.

I have an acer aspire 6935. When i plug in headphones the speakers do not mute. This means that when i attempt to use my headset the sound is played through both speakers and headphones, which is far from ideal.

Upon further tweaking the microphone does seem to work, I'm now stuck with just the headphone problem. All help appreciated, having used ubuntu off and on for the last 3 years and almost entirely for the last year I would really hate to have to go back to windows..