I'm using a RaspberryPi 4 (4GB) and I was able to set up /etc/wpa_supplicant/wpa_supplicant.conf with all needed certificates properly, to authenticate at our companys wifi:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev


    key_mgmt=WPA-EAP IEEE8021X
    identity="[email protected]"

Using wpa_supplicant -i wlan0 -D wext -c /etc/wpa_supplicant/wpa_supplicant.conf for testing, it's authenticating perfectly and obtaining a vaild IP:

Successfully initialized wpa_supplicant
ioctl[SIOCSIWENCODEEXT]: Invalid argument
ioctl[SIOCSIWENCODEEXT]: Invalid argument
wlan0: Trying to associate with 00:5d:71:c9:4d:ef (SSID='WIFI-Com' freq=5320 MHz)
FT: Invalid group cipher (0)
Failed to add supported operating classes IE
wlan0: Associated with 00:5d:71:c9:4d:ef
wlan0: CTRL-EVENT-EAP-STARTED EAP authentication started
wlan0: CTRL-EVENT-EAP-PROPOSED-METHOD vendor=0 method=13
tls_connection_set_params: Clearing pending SSL error: error:14187180:SSL routines:ssl_do_config:bad value
tls_connection_set_params: Clearing pending SSL error: error:14187180:SSL routines:ssl_do_config:bad value
wlan0: CTRL-EVENT-EAP-METHOD EAP vendor 0 method 13 (TLS) selected
wlan0: CTRL-EVENT-EAP-PEER-CERT depth=1 subject='/DC=com/DC=company/CN=Company Certification Authority' hash=53e1f7164f972fccfa24dc5dee64e362bed56ea014995fd990c760dd873760a7
wlan0: CTRL-EVENT-EAP-PEER-CERT depth=0 subject='/C=COM/L=NewYork/O=Company/CN=eap.comp.com' hash=d586970276d8076bd01cdbd4258452ea291d72af282fefa80fd8f8ef55e0c471
wlan0: CTRL-EVENT-EAP-SUCCESS EAP authentication completed successfully
wlan0: PMKSA-CACHE-ADDED 00:5d:71:c9:4d:ef 0
wlan0: WPA: Key negotiation completed with 00:5d:71:c9:4d:ef [PTK=CCMP GTK=CCMP]
wlan0: CTRL-EVENT-CONNECTED - Connection to 00:5d:71:c9:4d:ef completed [id=0 id_str=]

$ ifconfig
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet  netmask  broadcast
        inet6 fe80::4665:3320:1509:a176  prefixlen 64  scopeid 0x20<link>
        ether dc:a6:32:2d:3e:e2  txqueuelen 1000  (Ethernet)
        RX packets 4329  bytes 1559945 (1.4 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 5734  bytes 2019622 (1.9 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

If I reboot the Pi and run ps auxwww | grep wpa its supposed to connect to my wifi, as it is using the command given above. But it's not, instead it used driver nl80211. From what I experienced, it's only authenticating properly using exclusively -D wext. Where can I edit the -D parameters, that are used while booting?

root       334  ..   0:00 /sbin/wpa_supplicant -u -s -O /run/wpa_supplicant
root       440  ..   0:00 wpa_supplicant -B -c/etc/wpa_supplicant/wpa_supplicant.conf -iwlan0 -Dnl80211,wext
pi         721  ..   0:00 grep --color=auto wpa

2 Answers 2


Instead of modifying /lib/dhcpcd/dhcpcd-hooks/10-wpa_supplicant you can just add

env wpa_supplicant_driver=wext

to the end of /etc/dhcpcd.conf.


I was able figure it out. For some reason it used nl80211 instead of wext and I removed every nl80211 entry in /lib/dhcpcd/dhcpcd-hooks/10-wpa_supplicant.

Pretty special case and maybe not the common way, but done the trick.

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