On 9/29/20 10:33 AM, Fulko Hew wrote:
No, no other thread. In the original email I used iw command to turn manage off.

wlp2s0f0u4  wifi      unmanaged  --

wlp2s0f0u4  unassociated  ESSID:""  Nickname:"<WIFI@REALTEK>"
           Mode:Managed  Frequency=2.412 GHz  Access Point: Not-Associated

So now nmcli says it's unmanaged but iwconfig says it IS managed.

Ok, that is a little confusing. The nmcli "managed" means that NetworkManger is handling the device. The iwconfig "managed" is referring to the mode that the wifi device is in.

So I also tried both of the following to enable monitor:

[root@localhost fhew]# iw wlp2s0f0u4 set monitor none
command failed: No such device (-19)

That can't be the actual command you ran, because it's not valid. You're missing a "dev".

[root@localhost fhew]# iwconfig wlp2s0f0u4 mode monitor
Error for wireless request "Set Mode" (8B06) :
     SET failed on device wlp2s0f0u4 ; Invalid argument.

and neither worked.  So I'm back to thinking it's a driver issue.

Yes, that seems very likely to be the reason for both those commands failing.

P.S.  Looking at the newer Wireshark, I still didn't see a 'monitor'
button.  Perhaps it's because the wi-fi driver isn't supporting it?

When you open the capture options dialog, you might need to scroll to the right to see the monitor checkbox.
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