Good morning, I bought an Acer Aspire One 522 a couple of days ago, and the only OS already already installed was Windows 7. I'm currently installing Fedora 15 with a XFCE desktop, but I cannot make the headphone output work; sound coming from the loudspeakers is OK, but connecting a headphone doesn't change anything: integrated loudspeakers still work and there is no sound at all in the headphone. Under Windows 7, there is no such problem. Any idea how I can solve this issue? Thanks for helping.