The code seems to just call /sbin/reboot. See DistUpgrade/DistUpgradeController.py lines 1868 - 1871. Could you try calling that directly after the upgrade? Thanks!
** Changed in: ubuntu-release-upgrader (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1604173 Title: Clicking "Reboot Now" after 14.04-->16.04 upgrade has no effect To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1604173/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs