root@kali:~# airmon-ng
Interface Chipset Driver
wlan0 Broadcom wl - [phy0]
root@kali:~# airmon-ng start wlan0
Found 2 processes that could cause trouble.
If airodump-ng, aireplay-ng or airtun-ng stops working after
a short period of time, you may want to kill (some of) them!
-e
PID Name
2930 NetworkManager
4293 wpa_supplicant
Interface Chipset Driver
wlan0 Broadcom wl - [phy0]mon0: ERROR while getting interface flags: No such device
(monitor mode enabled on mon0)
root@kali:~# airodump-ng mon0
Interface mon0:
ioctl(SIOCGIFINDEX) failed: No such device