You are trying to install grub to /dev/sda, which is partitioned with GPT, but you are performing a BIOS mode install. This requires you to create a 1 mb bios_grub partition, or install grub to an MBR partitioned disk ( and make sure your bios is set to boot from that disk ).
** 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/1708880 Title: Testing Alpha 2 install couldnt install grub To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1708880/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs