Ok, there's nothing obviously wrong in that output. Can you please try the following commands:
sudo apt install strace sudo strace -ff -o /tmp/grub-install-trace -s 256 grub-install --target=x86_64-efi And attach the resulting /tmp/grub-install-trace* files to this bug report? ** Package changed: shim-signed (Ubuntu) => grub2 (Ubuntu) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1707832 Title: package shim-signed 1.32~16.04.1+0.9+1474479173.6c180c6-1ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1707832/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
