j'ai bien fait update-grub,j'ai même rebooté en voyant que ca marchais pas !!
iwconfig
lo no wireless extensions.
eth0 no wireless extensions.
wmaster0 no wireless extensions.
wlan0 IEEE 802.11bg ESSID:"Livebox-1CD0"
Mode:Managed Frequency:2.412 GHz Access Point: 00:1E:4C:A9:AF:81
Bit Rate=54 Mb/s Tx-Power=20 dBm
Retry long limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=43/70 Signal level=-67 dBm Noise level=-102 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0