802.1X supplicant issues with Intel 8265NGW

[elias_mir]

@WayneWWW

Hi elias_mir,

Our developer finds the cause here and may help resolve the issue of creating adhoc mode.

Root cause: intel chipset 8265 like other chipsets have support for the certain combination of the simultaneous interfaces. This can be verified by the iw list command and valid interface combinations section of the command output as shown below:

* #{ managed } <b><= 1</b>, #{ AP, P2P-client, P2P-GO } <b><= 1</b>, #{ P2P-device } <b><= 1</b>,
total <= 3, #channels <= 2

This basically means, IBSS can not co-exist with other interface types for this intel chipset and driver. wpa_supplicant by default during boot creates two interfaces, wlan0 which is of type managed and p2p-wlan0-dev which is of type p2p-device. When user tries to create ibss/adhoc interface using nmcli or NM GUI, wpa_supplicant downs the wlan0 managed interface and re-configures it to be of type adhoc, so far it is good. Problem is when it tries to up the interface, cfg and mac 80211 tries to pre-check valid combination of the interfaces for the given chipset and it fails as there is other interface of type p2p-device exist (p2p-wlan0-dev). There is a p2p_disabled flag in the wpa_supplicant.conf which can disable p2p device creations but it seems wpa_supplicant does not honour that flag (may be bug in the wpa_supplicant). So only solution is to compile and install wpa_supplicant without CONFIG_P2P option. Followed below steps to install and compile wpa_supplicant version 2.6.

All below commands are executed as a root.

1) Install below prerequisites (need internet connection for this):
apt install -y libnl-3-dev
apt install -y libssl-dev
apt install -y libdbus-1-dev
apt-get install libnl-genl-3-dev
apt-get install libncurses5-dev

2) systemctl stop wpa_supplicant 

3) Take a back up of the wpa_* from /sbin directory

4) Follow steps to compile from (download package to Jetson platform) 
http://www.linuxfromscratch.org/blfs/view/8.1/basicnet/wpa_supplicant.html
#please follow till "Install WPA Supplicant by running the following commands:" section.

5) copy generated wpa_supplicant binary to /sbin directory

6) systemctl start wpa_supplicant

7) Follow NM GUI to create adhoc, specify either manual config or shared to other computer in IpV4 settings field in the GUI. It succeeds creating and joining the adhoc network.

Hi Wayne,

It works perfectly!

Thank you very much for the help.

[dipenp]

Hi elias_mir,

If possible, can you post the steps you followed to create adhoc nodes?