You tried to install grub to /dev/sda, which is partitioned with GPT. To boot a BIOS booting computer from a GPT disks requires a 1 mb bios_grub partition. You will either need to create such a partition, or install grub to another disk that is partitioned with MBR.
** Changed in: grub-installer (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1703017 Title: grub install failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1703017/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs