How to use Wi-Fi channels above 11?

Question

I've seen multiple reports for this bug on Ubuntu, yet no solution. In this case, the network is recognized but I can't connect.

(No, it's not a router/driver issue.)

Answer 1

This might be a way to work around this:

https://bugs.launchpad.net/ubuntu/+source/wireless-tools/+bug/227643/comments/3

Notably:

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.