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 Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1273201 Title: bridge_ignore_without_connections.patch breaks NM created bridge at boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1273201/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
