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Having an issue connecting to the comcast Xfinity WiFi (only my home network, laptop can connect to other WiFi networks). Ubuntu shows that connection is established, I can access Internet/my router for a few seconds, then no data is coming back (ping shows 30% package loss as soon as I connect, goes to 100% after a few seconds and says Destination host unreachable later).

Default gateway is set to, which is router address. MAC address is the same too.

Called comcast support, they did reset my router few times, I power cycled it multiple times as well.

  • Acer Aspire V3
  • Ubuntu 12.10 x64
  • Dual boot with Windows 8 (preinstalled, UEFI)
  • Router Arris Interactive, L.L.C. tg862g

dmesg output: http://bpaste.net/show/1a3BJL4cvceUrSOc1eh9/

ifconfig -a
eth0      Link encap:Ethernet  HWaddr 70:54:d2:a6:79:44  
      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:  Mask:
      inet6 addr: ::1/128 Scope:Host
      UP LOOPBACK RUNNING  MTU:16436  Metric:1
      RX packets:123 errors:0 dropped:0 overruns:0 frame:0
      TX packets:123 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:0 
      RX bytes:10867 (10.8 KB)  TX bytes:10867 (10.8 KB)

wlan0     Link encap:Ethernet  HWaddr 20:16:d8:a6:4b:c9  
      inet addr:  Bcast:  Mask:
      inet6 addr: fe80::2216:d8ff:fea6:4bc9/64 Scope:Link
      RX packets:8 errors:0 dropped:0 overruns:0 frame:0
      TX packets:60 errors:0 dropped:0 overruns:0 carrier:0
      collisions:0 txqueuelen:1000 
      RX bytes:1051 (1.0 KB)  TX bytes:10840 (10.8 KB)



wlan0     IEEE 802.11abgn  ESSID:"osipov-wifi"  
      Mode:Managed  Frequency:2.462 GHz  Access Point: 00:1D:D4:FA:28:60   
      Bit Rate=130 Mb/s   Tx-Power=27 dBm   
      Retry  long limit:7   RTS thr:off   Fragment thr:off
      Power Management:on
      Link Quality=70/70  Signal level=-30 dBm  
      Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
      Tx excessive retries:1  Invalid misc:0   Missed beacon:0

Any steps I can take?

EDIT: Also tried fiddling with WiFI security settings.

share|improve this question

migrated from superuser.com Mar 20 '13 at 15:15

This question came from our site for computer enthusiasts and power users.

This guy had exactly the same problem in Sep 2012: superuser.com/questions/478835/… –  Ruslan Osipov Mar 20 '13 at 14:01

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