I missed some relevant logs: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/eth0.1, iface: eth0.1) SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/eth0.1, iface: eth0.1): no ifupdown configuration found.
>From that, I think I found the root cause. After doing "apt-get source network-manager" and grepping for "no ifupdown configuration found", I looked in src/settings/plugins/ifupdown/plugin.c and found the function udev_device_added(), which does a g_hash_table_lookup() to find out if the interface is managed or not. It appears that NetworkManager doesn't ever refresh its idea of the interfaces list. So if you edit /etc/network/interfaces, NetworkManager doesn't update its internal hashtable of unmanaged interfaces. Therefore, the following is a workaround: sudo invoke-rc.d network-manager restart sudo ifup <desired-unmanaged-interface> -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1439436 Title: NM in vivid tries to take over my libvirt bridge, deconfigures its address To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1439436/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
