Ubuntu 12.04 нет подключения к интернету

У меня есть ноутбук, который загружается одновременно с Ubuntu 12.04 или Windows 7, но я не могу сделать ничего, требующего подключения к Интернету на стороне Ubuntu. Я прошел через руководство по устранению неполадок очистки кеша, перезапуска и т. Д. Безрезультатно. Значок беспроводной сети в верхнем меню показывает, что я подключен к своей сети Wi-Fi, но Firefox не работает, и я также не могу использовать протоколы ssh или sftp. Сообщение об ошибке, которое я получаю с Firefox: «Сервер не найден». Любые идеи приветствуются!

ifconfig:

eth0      Link encap:Ethernet  HWaddr e8:03:9a:34:9d:1d  
      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)
      Interrupt:41 Base address:0x8000

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:16436  Metric:1
      RX packets:1409 errors:0 dropped:0 overruns:0 frame:0
      TX packets:1409 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0
      RX bytes:125628 (125.6 KB)  TX bytes:125628 (125.6 KB)

wlan0     Link encap:Ethernet  HWaddr 88:53:2e:94:c2:b7  
      inet addr:192.168.1.103  Bcast:192.168.1.255  Mask:255.255.255.0
      inet6 addr: fe80::8a53:2eff:fe94:c2b7/64 Scope:Link
      UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
      RX packets:594 errors:0 dropped:0 overruns:0 frame:0
      TX packets:1109 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000
      RX bytes:172548 (172.5 KB)  TX bytes:84207 (84.2 KB)

ping google.com:

ping: unknown host google.com

ls -ld /etc/resolv.conf:

lrwxrwxrwx 1 root root 29 Aug 17  2012 /etc/resolv.conf -> ../run/resolvconf/resolv.conf

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 127.0.0.1
search hsd1.fl.comcast.net

ping -c4 192.168.1.1:

PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.

--- 192.168.1.1 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 2999ms

ping 192.168.1.1:

PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
From 192.168.1.103 icmp_seq=1 Destination Host Unreachable
From 192.168.1.103 icmp_seq=2 Destination Host Unreachable
From 192.168.1.103 icmp_seq=5 Destination Host Unreachable
From 192.168.1.103 icmp_seq=6 Destination Host Unreachable
From 192.168.1.103 icmp_seq=7 Destination Host Unreachable
From 192.168.1.103 icmp_seq=8 Destination Host Unreachable
^C
--- 192.168.1.1 ping statistics ---
11 packets transmitted, 0 received, +6 errors, 100% packet loss, time 10056ms
pipe 3

route -n:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0 wlan0
169.254.0.0     0.0.0.0         255.255.0.0     U     1000   0        0 wlan0
192.168.1.0     0.0.0.0         255.255.255.0   U     2      0        0 wlan0

dmesg | grep wlan0:

[   28.289967] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   28.290703] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   35.980297] wlan0: authenticate with 00:23:69:c6:c9:c8 (try 1)
[   35.984082] wlan0: authenticated
[   35.992776] wlan0: associate with 00:23:69:c6:c9:c8 (try 1)
[   35.998868] wlan0: RX AssocResp from 00:23:69:c6:c9:c8 (capab=0x411 status=0 aid=4)
[   35.998872] wlan0: associated
[   36.003690] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[   46.419609] wlan0: no IPv6 routers present

ifconfig (снова):

eth0      Link encap:Ethernet  HWaddr e8:03:9a:34:9d:1d  
          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)
          Interrupt:41 Base address:0x8000

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:16436  Metric:1
          RX packets:147 errors:0 dropped:0 overruns:0 frame:0
          TX packets:147 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:13468 (13.4 KB)  TX bytes:13468 (13.4 KB)

wlan0     Link encap:Ethernet  HWaddr 88:53:2e:94:c2:b7  
          inet addr:192.168.1.103  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::8a53:2eff:fe94:c2b7/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:65 errors:0 dropped:0 overruns:0 frame:0
          TX packets:213 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:20780 (20.7 KB)  TX bytes:55633 (55.6 KB)