restoring Networkmanager after airmon-ng check kill

Question

When I put my wireless adapter Realtek RTL8812AU in monitor mode with the commands

airmon-ng check kill; iw dev wlan0 set type monitor

Killing these processes:

  PID Name
 1167 wpa_supplicant

Then when I want to restore it in normal mode it won't show anymore in Network manager, even if I try to switch it off with: ip link set wlan0 down and then up.

The only way to restore the use of the device with Nm is to unplug the device and re-plug it. Is there a better way to restore the functionality of the device? Maybe by restoring the wpa_supplicant process?

Answer 1

I am not using fedora, I am writing this from (kali-2019.1)

So I don't know if these two operating systems handle the interfaces differently or not. I did notice you are using these commands in a odd way. (fedora specific?)

airmon-ng check kill; iw dev wlan0 set type monitor

    I usually call on airmon-ng like this:

    airmon-ng check 

    Found 3 processes that could cause trouble.
Kill them using 'airmon-ng check kill' before putting
the card in monitor mode, they will interfere by changing channels
and sometimes putting the interface back in managed mode

  PID Name
 2558 NetworkManager
 2573 wpa_supplicant
 2575 dhclient
Then "airmon-ng check kill"
Then use: "airmon-ng start wlan0"
Which creates the virtual interface "wlan0mon"

When you are done tinkering in monitor mode, and would like to use managed mode again.

1. airmon-ng stop wlan0mon (or whatever the virtual interface name is)
2. service NetworkManager start
3. service wpa_supplicant start

And you may need to use "ifconfig wlan0 down/up". I have found it really depends on the card in use.

~Hope this helps you out