It seems the problem comes from regulatory domain being set to US by default.
A solution is to add something like /etc/modprobe.d/80211.conf containing the following : options cfg80211 ieee80211_regdom=EU I don't know if this shouldn't be set somehow from a configuration via debconf, though :-/ Hope this helps, -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]

