Following the advice here: http://www.davidpashley.com/articles/network- troubleshooting.html
I get this output when running the 'broken' kernel. When running the older kernel the mii-tool shows the expected result instead. $ ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN mode DEFAULT qlen 1000 link/ether 5c:26:0a:7a:26:34 brd ff:ff:ff:ff:ff:ff 3: eth1: <NO-CARRIER,BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state DORMANT mode DORMANT qlen 1000 link/ether d0:df:9a:d8:2b:46 brd ff:ff:ff:ff:ff:ff $ sudo mii-tool [sudo] password for stephen: SIOCGMIIPHY on 'eth1' failed: Operation not supported no MII interfaces found -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1161655 Title: Wired and wireless networking don't work after upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1161655/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs