That's likely not a bug in xen-tools as it does not fiddle with the bridges unless explicitly told to do so. Not sure which package else, though, maybe xen-utils-common?
** Package changed: xen-tools (Ubuntu) => xen-common (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/997297 Title: tmpbridge is the name of the bridge and networking not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xen-common/+bug/997297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs