Connexion wifi ad hoc vers une Gopro

Hello,

J'essaye de configurer une connexion réseau pour me connecter, via un
dongle wifi, sur ma gopro (ad hoc). Je l'ai déjà fait, mais je ne
retrouve plus les paramètres exacts...

Dans /etc/network/interfaces, j'ai :

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iface wlan0 inet dhcp
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

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Et dans /etc/wpa_supplicant/wpa_supplicant.conf, j'ai :

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ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

network={
ssid="xxx"
psk="yyy"
key_mgmt=WPA-PSK
proto=WPA2
pairwise=CCMP
group=CCMP
priority=5
}

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Mais ça ne marche pas :

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$ sudo ifup wlan0 -v
Configuring interface wlan0=wlan0 (inet)
run-parts --exit-on-error --verbose /etc/network/if-pre-up.d
run-parts: executing /etc/network/if-pre-up.d/ethtool
run-parts: executing /etc/network/if-pre-up.d/wireless-tools
run-parts: executing /etc/network/if-pre-up.d/wpasupplicant
wpa_supplicant: wpa-driver nl80211,wext (default)
wpa_supplicant: /sbin/wpa_supplicant -s -B
                -P /run/wpa_supplicant.wlan0.pid -i wlan0 -D
                nl80211,wext -c /etc/wpa_supplicant/wpa_supplicant.conf
Starting /sbin/wpa_supplicant...
wpa_supplicant: /sbin/wpa_supplicant daemon failed to start
run-parts: /etc/network/if-pre-up.d/wpasupplicant exited with return
           code 1
Failed to bring up wlan0.

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Une idée ?

Merci d'avance.

-- 
    Frédéric