I had the same problem. After a network-wide power failure, my machine rebooted and requested an IP address at 12:08pm, and again at 12:09 but my sysadmin tells me that the DHCP server didn't complete its reboot until 12:10pm. At that point, network manager had already given up and deactivated eth0. I didn't have any connectivity at all until I came back into my office and clicked the "auto eth0" in the nm-applet GUI.
I've attached the syslog messages generated while network manager was trying to get an IP address. ** Attachment added: "netlog.txt" https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/672562/+attachment/3548132/+files/netlog.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/672562 Title: NetworkManager does not re-enable connection which was disabled because DHCP timed out To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/672562/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
