According to your logs, it seems that "playonlinux" has some dependency problems. You can try to uninstall it, try the upgrade again, and reinstall it back if the upgrade completes.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/873855 Title: Error "cannot calculate upgrade" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/873855/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
