Problemme bouton wifi ubuntu

bonjour
j'ai un problemme pour faire aler ma carte wifi sur mon ordi
j'ai passé l'ordi de W10 a ubuntu 15.04
et il y a un bouton pour le wifi que l'on peut activer et déactiver
mais il n'est pas actif sous ubuntu
et donc je n'ai pas de carte wifi actif
la carte est reconue mais pas lue

voila le resultat de ces commandes :

/sbin/iwconfig    
/sbin/ifconfig    
/sbin/route -n    
cat /etc/resolv.conf    
nslookup www.google.fr    
ping -c2 www.google.fr

alexis@ati14-COMPAQ:~/Bureau$ /sbin/iwconfig  
lo        no wireless extensions.

eth1      no wireless extensions.

usb0      no wireless extensions.

alexis@ati14-COMPAQ:~/Bureau$ /sbin/ifconfig
eth1      Link encap:Ethernet  HWaddr 00:16:d4:e6:d7:46  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:2398 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2398 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:242718 (242.7 KB)  TX bytes:242718 (242.7 KB)

usb0      Link encap:Ethernet  HWaddr 06:b0:61:ed:81:86  
          inet addr:192.168.137.9  Bcast:192.168.137.255  Mask:255.255.255.0
          inet6 addr: fe80::4b0:61ff:feed:8186/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:10450 errors:2 dropped:0 overruns:0 frame:2
          TX packets:11913 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:9604885 (9.6 MB)  TX bytes:1786660 (1.7 MB)

alexis@ati14-COMPAQ:~/Bureau$ /sbin/route -n  
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.137.129 0.0.0.0         UG    100    0        0 usb0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 usb0
192.168.137.0   0.0.0.0         255.255.255.0   U     100    0        0 usb0
alexis@ati14-COMPAQ:~/Bureau$ cat /etc/resolv.conf 
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.1.1

alexis@ati14-COMPAQ:~/Bureau$ nslookup www.google.fr  
Server:		127.0.1.1
Address:	127.0.1.1#53

Non-authoritative answer:
Name:	www.google.fr
Address: 216.58.213.131

alexis@ati14-COMPAQ:~/Bureau$ ping -c2 www.google.fr
PING www.google.fr (216.58.213.131) 56(84) bytes of data.
64 bytes from par21s03-in-f3.1e100.net (216.58.213.131): icmp_seq=1 ttl=53 time=428 ms
64 bytes from par21s03-in-f3.1e100.net (216.58.213.131): icmp_seq=2 ttl=53 time=145 ms

--- www.google.fr ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 999ms
rtt min/avg/max/mdev = 145.875/287.059/428.243/141.184 ms