lxp, could you do a quick test and let us know if you can see the signal strength? I remember on my n810 without patch, we can use monitor mode with tcpdump, but without signal strength information. Thanks a lot.
stop wlancond ifconfig wlan0 down iwconfig wlan0 mode monitor channel 6 ifconfig wlan0 up tcpdump -i wlan0 -w test.cap start wlancond