diff -Naur compat-wireless-2008-03-28/net/mac80211/ieee80211_sta.c compat-wireless-2008-03-28-new/net/mac80211/ieee80211_sta.c
--- compat-wireless-2008-03-28/net/mac80211/ieee80211_sta.c	2008-03-28 02:14:15.000000000 -0300
+++ compat-wireless-2008-03-28-new/net/mac80211/ieee80211_sta.c	2008-04-03 16:47:33.000000000 -0400
@@ -1823,6 +1823,16 @@
 	}
 
 	ieee80211_set_disassoc(dev, ifsta, 0);
+
+	/* Set state to un-authenticated when receive
+	   a disassociation request from the AP by inactivity */
+	if( reason_code == 4 ) {
+		ifsta->auth_tries = 0;
+		ifsta->flags &= ~IEEE80211_STA_AUTHENTICATED;
+		ifsta->state = IEEE80211_AUTHENTICATE;
+		mod_timer(&ifsta->timer, jiffies +
+			IEEE80211_RETRY_AUTH_INTERVAL);
+	}
 }