sorry, on closer inspection the interfaces.utf8 file has some non- printing characters. an interfaces file with no leading spaces still fails (attached). so, despite that red herring, i think the root problem remains. i'm presently unsure why the utf version of the file works. it doesn't seem to be simply ignoring the lines with the extra leading characters, because when i grep those lines out of the interfaces file and reboot the result is just an eth0 and eth1. it's also worth noting this is only a problem at boot-time. issuing an ifdown/ifup br0 once the system has killed off bridge-network-interface gives a working network.
** Attachment added: "interfaces.nospc" https://bugs.launchpad.net/ubuntu/+source/bridge-utils/+bug/1003656/+attachment/3163770/+files/interfaces.nospc -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1003656 Title: when adding a bond the bridge fails to acquire a dhcp address To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bridge-utils/+bug/1003656/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs