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Intel Dual Band Wireless-AC 8260 doesn't go to monitor mode

mrmojo
Beginner
673 Views

i need to use Wireshark to look at traffic in monitor mode but my wireless adapter doesn't seem to work in monitor mode. I use Ubuntu 20.04 and the kernel version is 5.11 and the wireless drive is iwlwifi. When i manually turn the monitor mode by

sudo iwconfig wlp2s0 mode monitor

 it automatically goes back to managed mode after few seconds

i have also set the module with amsdu_size=3 value as suggested by this page but it still doesn't work

 

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7 Replies
JosueO_Intel
Moderator
660 Views

Hello mrmojo,


Thank you for posting on the Intel communities. In order to have a better understanding of the issue, please share with us the following information: 


  1. Was it working before? If so, when did the issue start happening?
  2. Is this a desktop or a laptop?
  3. Have tried using drivers by the OEM?
  4. Does the issue also occur on Windows*? 
  5. Is this the original adapter of the system?



Regards, 


Josue O.  

Intel Customer Support Technician


mrmojo
Beginner
652 Views

No it wasn't working before

It's a ThinkPad L380 laptop

No i haven't tried other drivers except iwlwifi which according to Linux Wireless Wiki is the driver for Intel Dual Band Wireless-AC 8265

I don't have windows so i have no idea

Yes it is the original adapter of the system

 

 

JosueO_Intel
Moderator
617 Views

Hello mrmojo,


Thank you for the information provided, it is important for you to know that the monitor mode support depends on the Linux driver. The command line '# iw list' will return what is and is not supported for his wireless card.


And check the following in the output:

Software interface modes (can always be added):

*AP/VLAN

*monitor


Also, our recommendation is to check directly with the Wi-Fi Linux community about setting up monitor mode. 



Regards, 


Josue O.  

Intel Customer Support Technician



mrmojo
Beginner
600 Views

the output of iw list does contain

Software interface modes (can always be added):

*AP/VLAN

*monitor

 

 

 

JosueO_Intel
Moderator
596 Views

Hello mrmojo,


Thank you for the information provided, have you checked with the Wi-Fi Linux community for assistance setting up the monitor mode? Please let me know if their recommendations help you with the issue. 


Regards, 


Josue O.  

Intel Customer Support Technician



JosueO_Intel
Moderator
554 Views

Hello mrmojo,


Were you able to check the previous post?  

Let us know if you still need assistance.  



Regards, 


Josue O.  

Intel Customer Support Technician



JosueO_Intel
Moderator
535 Views

Hello mrmojo,


We have not heard back from you, so we will close this thread. If you need any additional information, please submit a new question as this thread will no longer be monitored. 


Regards, 


Josue O.  

Intel Customer Support Technician


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