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I'm on Antergos linux, 4.9.73-1-lts x86_64. I've bought a usb wi-fi adapter tp-link tl-wn722n and can't set it up on my laptop. I also have MT7630e wi-fi card inside. Are the ways to enter the monitor mode on the second card the same? What info/logs should I post?

[root@OrpheusPlanet starorpheus]# iwconfig
 wlp3s0f0  IEEE 802.11  ESSID:"Mamus"  
           Mode:Managed  Frequency:2.427 GHz  Access Point: C0:25:E9:B1:A1:92   
           Bit Rate=150 Mb/s   Tx-Power=20 dBm   
           Retry short limit:7   RTS thr:off   Fragment thr:off
           Encryption key:off
           Power Management:off
           Link Quality=70/70  Signal level=56 dBm  
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:13  Invalid misc:74   Missed beacon:0

 wlp0s20u1  unassociated  Nickname:"<WIFI@REALTEK>"       ; this one is external
           Mode:Managed  Frequency=2.412 GHz  Access Point: Not-Associated   
           Sensitivity:0/0  
           Retry:off   RTS thr:off   Fragment thr:off
           Encryption key:off
           Power Management:off
           Link Quality:0  Signal level:0  Noise level:0
           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
           Tx excessive retries:0  Invalid misc:0   Missed beacon:0

BUT

[root@OrpheusPlanet starorpheus]# iw dev
 phy#0
      Interface wlp3s0f0
           ifindex 3
           wdev 0x1
           addr ec:0e:c4:29:80:d9
           type managed
           channel 4 (2427 MHz), width: 40 MHz, center1: 2437 MHz
           txpower 20.00 dBm

And

 [root@OrpheusPlanet starorpheus]# iw wlp0s20u1 set monitor control
 command failed: No such device (-19)

So, everything looks like I have an installed wi-fi driver to this card (I can connect to networks), but it doesn't support monitor mode. Am I right? How can I check that?

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  • What are you using to put it into monitor/promiscuous mode? I use airmon-ng. I'm not familiar with this distro. You may have to add a repository for it. Do a apt-get install, or whatever your distro uses to install packages.
    – Tim_Stewart
    Commented Mar 5, 2018 at 20:19
  • The external card not showing up in iw dev while it does in iwconfig is bad. I suspect outdated drivers which don't use the modern API. Please update to the newest kernel of your distro. After that, edit question with the new lines in dmesg that appear when you plug in the adapter (type dmesg before and remember last line, or look at timestamp).
    – dirkt
    Commented Mar 6, 2018 at 11:54

1 Answer 1

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Check the version of your device. The TLWN722N V2 native driver won't support monitor mode. Unless you install a custom driver provided by Mfruba Link

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