I am seeing this issue as well with an intel 82566DC-2 NIC. It was working fine until sometime post 12.04.1. 12.10 also exhibits this behavior. The RealTek Wireless I installed as a backup works fine. I built the latest Intel driver but it exhibited the same problems
** Attachment added: "NICBug.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1070182/+attachment/3416853/+files/NICBug.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1070182 Title: Can't connect to the network through a wired connection - Network dialog shows "Wired Cable unplugged" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1070182/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs