Answers:
这可能是解决此问题的方法:
https://bugs.launchpad.net/ubuntu/+source/wireless-tools/+bug/227643/comments/3
值得注意的是:
Put the following line in your /etc/modprobe.d/options
options cfg80211 ieee80211_regdom="EU"
Then reload the module iwl4965 or iwl3945 and channels 12 & 13 should work
again.