It appears that you have multiple disks and attempted to install grub to sda, and ubuntu on another disk, but sda is partitioned using gpt, but has no bios_grub partition. You either need to create a 1 mb bios_grub partition on sda, or install grub to another disk ( and have your bios 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/1310950 Title: Ubuntu 14.04 Executing grub-install failed and then the installer crashed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1310950/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs