Comment 2 for bug 1257956

I have the exact same problem. I was not sure what it came from at the beginning but today it was clearly Audacity that stops my headphone port from working.

I was listening to music before through the same headphones, with different apps. As soon as I opened the same sound with Audacity, my headphone port stopped working whereas I can unplug them and use my laptop speakers. After that, even out of Audacity, I can not use my headphones with the apps that worked before then.
I only hear little "breathing" sounds every time a sound/song is supposed to start, or when the sound/song is supposed to finish and the app "releases" the sound system.

It takes several reboots before it eventually start working again, sometimes after a few days.

I have no idea what happens but it is an extremely disrupting problem as I can not make any music without good quality headphones.

I am using Ubuntu 13.10 64bits with Audacity 2.0.5

Please let me know if I can give you something else to help fix this.