According to a thread in the forum (http://ubuntuforums.org/showthread.php?t=1491242&highlight=eth0+network+manager), my disabled networking was probably caused after a hibernate locked up the machine and I had to physically reboot it. Unfortunately, the solution in the thread is for Ubuntu, not KUbuntu which is what I'm running.
-- Upgrade removes eth0 from /etc/network/interfaces https://bugs.launchpad.net/bugs/579941 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs