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I have a desktop computer with a GA-E240N GIGABYTE Motherboard and running Kubuntu 12.04. On this computer I connect to the internet by wire. Because of stormy weather I decided to unplugged the internet cable and not use the computer the for the entire weekend.

On Monday I turned on the computer and my internet connection was gone. I was able to connect wireless from my laptop but the wired connection didn't work (not even on my laptop).

After changing the cable I was able to connect with my laptop by wire both booting from windows and Kubuntu (12.04) so this ruled out the chance of being a cable/router issue, however I haven't being able to get my desktop connection back again.

At the moment when I boot network manager says setting network address, but after it fails it says Cable Unplugged. It tries a couple of times but fails.

So far I have tried :

  • Changing /etc/network/interfaces as suggested here : (Network is not working anymore - Ubuntu 12.04).

  • Configuring through Network Manager.

  • Copying /etc/network/ and /etc/NetworkManager/ from my laptop to my desktop (as suggested in the link pasted above).

Without any luck.

I have found many posts with similar issues but no solution to my problem yet.

Here is the output from ifconfig and lshw:

sudo lshw -C network

       description: Ethernet interface
       product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
       vendor: Realtek Semiconductor Co., Ltd.
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth0
       version: 06
       serial: 94:de:80:a3:75:1a
       size: 10Mbit/s
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8168e-3_0.0.4 03/27/12 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
       resources: irq:40 ioport:de00(size=256) memory:fddff000-fddfffff memory:fddf8000-fddfbfff


eth0      Link encap:Ethernet  HWaddr 94:de:80:a3:75:1a  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:163 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:29364 (29.3 KB)
          Interrupt:40 Base address:0xe000 

lo        Link encap:Local Loopback  
          inet addr:  Mask:
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:2176 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2176 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:170160 (170.1 KB)  TX bytes:170160 (170.1 KB)

Anymore information needed just let me know and any suggestions would be much welcomed.

How can I fix this?

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