I tried the code you suggested but got the response, "E: Invalid operation auto". I have attached the sources list, which has a few non- standard sources.
** Attachment added: "Sources list" http://launchpadlibrarian.net/38587236/sources.list -- update manager cannot calculate upgrade - E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. https://bugs.launchpad.net/bugs/499537 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
