Found the source of the problem by finding the comments for bug #102068. xine-ui needs to be installed for kaffeine to play dvds. I can confirm that dvd playback works immediately installing xine-ui.
** Changed in: kaffeine (Ubuntu) Status: New => Incomplete -- kaffeine dvd playback fails https://bugs.launchpad.net/bugs/316990 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