Comment 9 for bug 220640

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ubuntu_demon (ubuntu-demon) wrote : Re: [hardy] iwl3945 + wpasupplicant fails to connect to university network. regression from gutsy (ipw3945+wpasupplicant)

I got different errors including :
ioctl[SIOCSIWSCAN] Device or resource busy
when I tried the following :

sudo modprobe -r iwl3945
create a file name iwl3945 in /etc/modprobe.d/ with :
========
alias wlan0 iwl3945
options iwl3945 disable_hw_scan=1
========
sudo modprobe iwl3945

taken from http://ubuntuforums.org/showthread.php?t=733054