Configurer comme suit :

~# ip a
~# lshw -class network
~# ip link show | grep w

ifconfig wlp3s0 up

wpa_passphrase MON_SSID ma_passphrase > /etc/wpa_supplicant.conf

~# iwlist scan

~# wpa_supplicant -B -i wlp3s0 -c /etc/wpa_supplicant.conf

Successful !

~# dhclient wlp3s0

vi /etc/network/interfaces

#INTERFACE WIFI
allow-hotplug wlp3s0
auto wlp3s0
iface wlp3s0 inet dhcp
#wpa-driver wext
#wpa-roam /etc/wpa_supplicant.conf
wpa-ssid "MON_SSID"
wpa-psk 68monahchdemaladequivientsafficherici