Hi Steve, Take a look at bug 283642. I don't know at all if it's related or not but the symptoms are very close and I've seen from your log file that etckeeper is installed on your system too
-- update-manager claims to do a release upgrade, but doesn't actually install packages https://bugs.launchpad.net/bugs/282830 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs