After the obligatory "changes will be written to disks" warning I didn't get far (2 minutes in) and was presented with the warning in this pic. I very well may have messed up here because I chose to continue rather than go back, but once again I regarded it as something only related to boot and assumed I could straighten that out after re-installation.
** Attachment added: "second_error.png" https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1423830/+attachment/4323663/+files/second_error.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1423830 Title: Trusty -> Vivid upgrade via live DVD froze (UEFI dual boot) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1423830/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs