I have exactly the same problem in i386. The OS version is 12.04.1 32 bit, NIC is Macronix 98715. With 12.10 LiveCD NetworkManager works as designed. Please let me know if you need logs.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1018933 Title: 1969:1083 NetworkManager does not connect eth0 -- atl1c To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1018933/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs