When I run
sudo airmon-ng start wlan0, I get this as the output:
dell@ubuntu:~$ sudo airmon-ng start wlan0 [sudo] password for dell: Found 5 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 1545 avahi-daemon 1546 avahi-daemon 1552 NetworkManager 1615 wpa_supplicant 11753 dhclient Process with PID 11753 (dhclient) is running on interface eth1 Interface Chipset Driver eth1 Unknown wl - [phy0]
Why is the chipset unknown?
It should say something like this "(monitor mode enabled on mon0)"