Are you using acer notebooks? If yes, then it's actually the activation button for the wifi is not functioning. Don't ask me how to enable it cause I also is still searching the answer and I'm a newbie to linux.

There were a few links that may help you if you are an expert in Linux, but I couldn't understands it.

http://forums.fedoraforum.org/showth...2&page=2&pp=15

http://www.archernar.co.uk/acer_acpi...acpi_main.html

Maybe oneday some one is kind enough to compile the sources in a way that is easier for a newbie like me...lol.