I can confirmed that the recent patch to utils.py fixes the problem on Ubuntu 12.04 to 14.04 upgrades.
The utils.py code has been around for a while, so I think this problem may also effect other upgrades (eg 10.04 to 12.04). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1290825 Title: Upgrade using do-release-upgrade takes a long time to start because 'iptables -L' runs with DNS lookups enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1290825/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs