I found the problem. Apparmor still had the 5.5 profile which survived the upgrade. However, the mysql config directory has moved and needed the 5.6 profile for Apparmor.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1455773 Title: mysql will not start after 5.5 to 5.6 upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mysql-5.6/+bug/1455773/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs