Dear Stanislaw: I find for cisco 1252 11N mode bandwith-20, ieee80211_sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 was wrong in bss_info_changed, I have to check 20/40 MHZ based on hw->conf.channel_type. All other APs will be ok, So may be it's AP IE's issue, But I think mac80211 should also check hw->conf.channel_type before set ieee80211_sta->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40. Thank you! lizhaoming -- -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html