[all variants] Realtek NIC issue; driver or kernel related?

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http://ubuntuforums.org – I've been using Ubuntu 10.04 for a couple years now and decided to try some newer distros(Ubuntu 11.10, Kubuntu, Xubuntu and Linux Mint 12). I'm currently running a dual-boot Xubuntu/Windows 7 desktop. Trying all the stated distros, I notice that when i shutdown the computer, which is connected to a router via ethernet, that the LAN activity light/connection at the router, remains on. This did not happen with Lucid Lynx and does not happen if I shutdown through Windows 7. I've removed the r8169 driver for my Realtek NIC and replaced it with r8168. No change whatsoever. So, does this seem to s (Hardware)