sudo ifconfig wlan0 down
sudo iwconfig wlan0 mode monitor
kali@kali:~$ iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
wlan0 IEEE 802.11 Mode:Monitor Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thrff Power Managementn
It's working fine.... but after use
sudo ifconfig wlan0 up
command Monitor mode changed automatically
kali@kali:~$ iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
wlan0 IEEE 802.11 ESSID:"AndroidAP_8730"
Mode:Managed Frequency:2.462 GHz Access Point: FC:AA:B6:7B7:28
Bit Rate=72.2 Mb/s Tx-Power=20 dBm
Retry short limit:7 RTS thr=2347 B Fragment thrff Power Managementn Link Quality=70/70 Signal level=-32 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0
Sometimes it doesn't come up.To no avail.
I have handled these steps as well.
sudo ip link set wlan0 down
sudo iw wlan0 set monitor control
sudo ip link set wlan0 up
What is this problem, how do I solve it. I'm using lenova laptop internal adapter.