Although it was not a short time after i make system upgrade to 8.04. I had never notice that i can only use wireless but not wired to connected internet until i moved into my new house. Yes, just like what you though. I had no choice but to use wired network to connect internet. It's a bug with the network driver, Realtek8168. Ubuntu did not loading the correct driver, r8618. It apply the wrong driver, r8619. In the situation, Ubuntu can sense wire and applying the r8169 driver to connect internet. However, it can not really make connection to Route and the information such like ip address or broadcast address all showed "0.0.0.0". Thanks to Dale Jefferson had solved the problem (although it's not really solved, i can use wired to make connection now.) To solve the problem need to install the correct driver, r8168. sudo apt-get install build-essential wget ftp://66.104.77.130/cn/nic/r8168-8.006.00.tar.bz2 tar -xjvf r8168-8.006.00.tar.bz2 cd r8168-8.006.00/src # and ...
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