How to use Wi-Fi channels above 11?
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.)
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.