I am also getting this on Xenial I found a bug report on Debian that discusses this issue and the causes. https://bugs.debian.org/cgi- bin/bugreport.cgi?bug=718232 The last post on Debian claims that this was fixed with resolvconf (1.75). I have resolvconf (1.781.78ubuntu2) on my system and the bug is still there, don't know if there is a difference between the resolvconf on Debian and Ubuntu. Mantainer might want to take a look at what the did with the Debian package.
Hope this helps. ** Bug watch added: Debian Bug tracker #718232 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=718232 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to sysvinit in Ubuntu. https://bugs.launchpad.net/bugs/1369493 Title: update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults Status in sysvinit package in Ubuntu: Confirmed Bug description: Upgrading xorg on Utopic (booted with upstart), the install dialog-box have displayed this warning: Setting up x11-common (1:7.7+7ubuntu2) ... update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults * Setting up X socket directories... [ OK ] ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: sysv-rc 2.88dsf-41ubuntu18 ProcVersionSignature: Ubuntu 3.16.0-14.20-generic 3.16.2 Uname: Linux 3.16.0-14-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.7-0ubuntu2 Architecture: amd64 CurrentDesktop: GNOME Date: Mon Sep 15 12:12:53 2014 PackageArchitecture: all SourcePackage: sysvinit UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/sysvinit/+bug/1369493/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp