Assuming sda1 is your EFI system partition and sda2 is your root partition, you can reinstall grub using the live cd with:
sudo -s mount /dev/sda2 /mnt mount /dev/sda1 /mnt/efi for f in dev sys dev/pts ; do mount --bind /$f /mnt/$f ; done chroot /mnt grub-install /dev/sda -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1187345 Title: package grub-efi-amd64 2.00-13ubuntu3 failed to install/upgrade: Unterprozess installiertes post-installation-Skript gab den Fehlerwert 1 zurück To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1187345/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs