commit 5c20aa5944d2023279578614c60751d7bed8763a
Author: Howard Chu <hyc@symas.com>
Date:   Mon Apr 20 18:50:23 2009 -0700

    Restore madwifi hack, don't scan when connected

diff --git a/src/nm-device-wifi.c b/src/nm-device-wifi.c
index 63c2c9d..07ddfd3 100644
--- a/src/nm-device-wifi.c
+++ b/src/nm-device-wifi.c
@@ -1777,7 +1777,16 @@ can_scan (NMDeviceWifi *self)
 			return FALSE;
 	}
 
-	return TRUE;
+	/* Devices supporting only B/G frequencies can scan when disconnected 
+	 * and activated, but not when activating.  We don't allow a/b/g devices to
+	 * scan when activated, because there are just too many channels to scan and
+	 * it takes too long to scan them, so users get angry when their SSH
+	 * sessions lag.
+	 */
+	if ((priv->num_freqs <= 14) && (dev_state == NM_DEVICE_STATE_ACTIVATED))
+		return TRUE;
+
+	return FALSE;
 }
 
 static gboolean