Hi I got the same problem in Ubuntu 14.04.
I used KVM on Ubuntu 14.04 with network using bridge, modifying the /etc/network/interfaces but today I tried to set the bridge using Network Manager. After setting the bridge on network manager, I used the brctl show and the eth0 card were not linked to the bridge, but taking the advice of opening the Network Manager configuration file (/etc/NetworkManager/NetworkManager.conf) and saving it without editing it, I got the bridge up. So this problem is still there in Ubuntu 14.04, can somebody set the affect release to Ubuntu 14.04 Trusty Tahr? Also, when I set this bridge, I got an error in the network, my PC is connected to a Cisco Switch 2960-S, my port become err-disable status. Because of this I removed all the NM configuration and used the old method and the bridged network worked again. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1273201 Title: bridge_ignore_without_connections.patch breaks NM created bridge at boot Status in network-manager package in Ubuntu: Fix Released Bug description: I've created a bridge with network-manager-gnome, the bridge slave physical device is eth0. After a reboot the bridge is brought up, but eth0 isn't attached. First test-case: Created a bridge with network-manager-gnome with the bridge slave physical device is eth0 and remove all other connections. After a reboot the bridge is brought up, but eth0 isn't attached. When I open /etc/NetworkManager/NetworkManager.conf and save it without any modification, eth0 is instantly added to my bridge. Strange! Second test-case: Created a bridge with network-manager-gnome with the bridge slave physical device is eth0. Disable the "autoconnect" of the default wired network. After a reboot the bridge is brought up, but eth0 isn't attached. Instead eth0 is brought up and full configured. After compiling and testing different upstream versions, i could track the problem down to bridge_ignore_without_connections.patch. A network-manager package without this specific patch, brings my bridge up at boot and adds eth0 to the bridge in both test-cases. I've checked the behaviour on my ubuntu 13.10 box with network-manager (0.9.8.0-0ubuntu22) and the trusty version network-manager (0.9.8.8-0ubuntu1) . Till now i couldn't encounter any sideeffects of removing this patch with the bridge created by libvirt. Regards Mathias Kresin To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1273201/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
