I'm not sure if that is the issue as I managed to get it to work without having to follow those steps:
http://askubuntu.com/questions/884991/ubuntu-16-10-dual-boot-error-grub- efi-amd64-signed-package-failed-to-install What appears to be the same bug has been reported elsewhere too: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1507505 https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1666157 ** Changed in: grub-installer (Ubuntu) Status: Invalid => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1666140 Title: Can't install Ubuntu 16.10 on dual boot XPS 13 (9360) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1666140/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
