Comment 9 for bug 205095

This problem also affects other drivers like at least rt73usb, Intel 3945 or ath5k. A gui in the network-manager to set this commands is highly desirable.

If you are here looking for a solution to your problem note that the mac80211 method no longer works in Intrepid. See the comment on intel 3945 in the release notes instead (https://wiki.ubuntu.com/IntrepidReleaseNotes).