I get what looks like a very similar problem on Karmic. I've found a workaround that works at the moment is to unload and reload the wireless driver like this:
sudo modprobe -r ath9k
sudo modprobe ath9k
Obviously, save your work before you try it in case it crashes your computer.
I get what looks like a very similar problem on Karmic. I've found a workaround that works at the moment is to unload and reload the wireless driver like this:
sudo modprobe -r ath9k
sudo modprobe ath9k
Obviously, save your work before you try it in case it crashes your computer.