Please make sure you don't have any entries in /etc/network/interfaces that fail to be brought up: any eth*, any wlan*, any bridge configurations that cannot be brought up will have the boot process hang until a timeout. This is expected behavior.
NetworkManager has grown a dependency on static-network-up, which is what brings up the lo interfaces (loopback) also required by NetworkManager and dnsmasq. This dependency is important and may be a cause for network-manager (or at least dnsmasq) failing to start. Since the processes that look at /etc/network/interfaces are the ones responsible for emitting the static-network-up signal, any invalid configuration in that file may be cause for delay or network-manager failing to start. Please attach the full contents of the file /etc/network/interfaces to this bug report. As for network-manager and network-manager-gnome, please make sure to run the very latest versions available for your release: sudo apt-get install network-manager/precise network-manager- gnome/precise libnm-glib4/precise libnm-util2/precise libnm-glib- vpn1/precise libnm-gtk0/precise libnm-gtk-common/precise For network-manager and libnm-util*, libnm-glib* you should get versions 0.9.4.0-0ubuntu4.1 (or -0ubuntu4.2 if you have proposed enabled), and for network-manager-gnome, libnm-gtk* you should get version 0.9.4.1-0ubuntu2. ** Changed in: network-manager (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1080454 Title: New network-manager is not started at boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1080454/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs