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I recently upgraded to Ubuntu 12.04. However the upgrade was completed but the upgradation process was broken many time due to some errors such as hash sum mismatched and size mismatched. I used --fix-missing to upgrade.

But this resulted in few problems in the system. The internet has stopped working continuously. The connection appears for some time then again drops. But it is working properly in dual boot Windows as well as with root login.

I got many sources with similar problem on google but none was working.

Output of ifconfig is:

eth0      Link encap:Ethernet  HWaddr f0:4d:a2:4b:2e:f3  
          inet6 addr: fe80::f24d:a2ff:fe4b:2ef3/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:4486 errors:0 dropped:0 overruns:0 frame:0
          TX packets:293 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:616114 (616.1 KB)  TX bytes:32189 (32.1 KB)
          Interrupt:45 Base address:0xe000 

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:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

wlan0     Link encap:Ethernet  HWaddr 20:7c:8f:2e:af:df  
          inet addr:10.132.125.34  Bcast:10.132.255.255  Mask:255.255.0.0
          inet6 addr: fe80::227c:8fff:fe2e:afdf/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:78174 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3444 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:11846886 (11.8 MB)  TX bytes:510067 (510.0 KB)
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Hello! Are you still looking for an answer to this question? – Seth Apr 10 at 3:53

closed as too localized by Seth, maggotbrain, The Lord of Time, Chris Wilson, Basharat Sial Apr 11 at 0:07

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