*** This bug is a duplicate of bug 1274672 *** https://bugs.launchpad.net/bugs/1274672
i'm having the same problem.. stil! even after the official release of 14.04. i'm upgrading from 13.10. even after disabeling -backports and every non-ubuntu source. did an ubuntu-bug ubuntu-release-upgrader-core and hope it wil be fixed in the next few days. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1270437 Title: Could not calculate the upgrade when updating from 12.04 to 14.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1270437/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs