Aircrack-ng suite provides a method of disabling Network Manager functions thru the airmon-ng check kill command. Unfortunately they did not tell you how to restore Network Manager after evoking airmon-ng check kill.
The actual commands are buried in the airmon-ng script.
The following three(3) commands should cover most kali distros:
service network-manager restart
service NetworkManager restart
service avahi-daemon restart
MTeams
Further to the above:
These service commands DONOT work if ANY wifi device is not in mode managed
Hence
iwconfig [ENTER] #gives you device status
Any device not in mode managed run the following:
ifconfig wlan? down
iwconfig wlan? mode managed
ifconfig wlan? up
Once all devices are in mode managed
You can now run the service commands or if these service commands have been already run then NetworkManager will come back on line.
Musket Team Labs