I was having problems with wireless on the netbook-oriented version of Ubuntu Karmic Koala.
ifconfig wlan0 up returned
SIOCSIFFLAGS: Unknown error 132. Thanks to Ubuntu’s bug database, I found the following solution:
rmmod ath9k rfkill block all rfkill unblock all modprobe ath9k rfkill unblock allShort URL: http://sachachua.com/blog/p/7071