Oh, I see there was an update to this stuff a few minutes ago. It seems to fix the issue. I couldn't find the original profile file in any source package nor could I find any bizzare branch on launchpad, so I installed it on another server and copied the file back to the problem server, /etc/apparmor.d/usr.sbin.dhcpd.
** Changed in: isc-dhcp (Ubuntu) Status: Incomplete => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1540672 Title: [xenial] dhcp server does not work with apparmor enabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/1540672/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs