If you encounter the bug when installing Ubuntu from the Desktop CD (most common method), the package is ubiquity.
** Package changed: ubuntu => ubiquity (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1507448 Title: Kubuntu installation into external disk ruins internal disk boot whilst leaving external disk unbootable To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1507448/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs