I have found a workaround. Copy /usr/lib/grub/x86_64-efi to /usr/lib/grub/i386-pc
sudo mkdir -p /usr/lib/grub/i386-pc sudo cp -a /usr/lib/grub/x86_64-efi/*.* /usr/lib/grub/i386-pc/ sudo apt-get -f install -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1526924 Title: grub-efi-amd64-singed failed to configure To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2-signed/+bug/1526924/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs