Looks like a problem in partman-efi: you don't have an EFI system partition, yet it did not fall back to using the bios version of grub.
** Package changed: grub-installer (Ubuntu) => partman-efi (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1514128 Title: Installer stopped with grub error when upgrading from 15.04 to 15.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/partman-efi/+bug/1514128/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
