Thanks for reporting this bug. It seems as though NetworkManager fails to start at the point where it would read /etc/network/interfaces.
Let's try to clean up some things just in case: please take a backup of /etc/network/interfaces (say, to your home directory using 'cp /etc/network/interfaces ~/e-n-i.backup'), then remove all the comments from it. Ideally all that should be left are the entries for lo and eth0, like so: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp Reboot, then make sure network-manager is really stopped: sudo stop network-manager Finally, start network-manager again with the following command: sudo /usr/sbin/NetworkManager --no-daemon --log-level=DEBUG --log- domains=USER_SET,SYS_SET,CORE,DEVICE >/tmp/nm.log 2>&1 & NetworkManager should start up and write debug information to nm.log. Please get that log from /tmp/nm.log and attach it to this bug. ** Changed in: network-manager (Ubuntu) Status: New => Incomplete ** Changed in: network-manager (Ubuntu) Importance: Undecided => Medium -- NetworkManager is not running https://bugs.launchpad.net/bugs/663735 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