Its not NetworkManager. According to the NetworkManager.conf manpage the no-auto-default has nothing to do with it.
Doing a Google search for that specific MAC address aa:00:04:00:0a:04 tells a different story. http://www.fantaghost.com/2010/06/eth0-mac-address-fixed-on- aa0004000a04/ Apparently installed DECnet software can do this on your system. I have found libdnet, dnet-common and xtrans-dev on my system. But don't ask me how it got there. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/878188 Title: Network Manager assigns incorrect MAC address to eth devices To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/878188/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs