Wireless working fine- but cannot connect to wired ethernet in Ubuntu 13.04

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http://ubuntuforums.org – Yesterday I installed Ubuntu 13.04 on a dualboot with Windows 7 preinstalled. Both my wireless and wired connections work fine on Windows 7. Wireless is working fine on Ubuntu also- but cannot get any connection through wired ethernet in ubuntu. The network adapter on my laptop is a Realtek PCIE.... (Hardware)