This dialog box strictly speaking isn't normal or expected, the installer initially configure grub_{efi,pc}/install_devices, then this isn't expected to pop up.
It usually shows up when the originally configured install device became invalid due to some system configuration change, and strictly speaking outside the simplest of case of one connected hark disk, there is no safe default that is appropriate. Please see https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1940723 and it's many duplicates. Is it possible that something was changed about this installation / computer since it was originally installed that could have caused the install device to become invalid? ** Also affects: grub2 (Ubuntu) Importance: Undecided Status: New ** No longer affects: shim-signed (Ubuntu) ** Summary changed: - Technical dialog during upgrade + grub-efi install device being prompted on upgrade -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2083176 Title: grub-efi install device being prompted on upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/2083176/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs