Public bug reported: Tried to update from Ubuntu 12.04 to 16.04 using a download on a USB stick and ran into errors. Then tried to upgrade the partial installation of 16.04 to 18.04 and ran into further errors.
ProblemType: Package DistroRelease: Ubuntu 16.04 Package: grub-efi-amd64-signed 1.66.22+2.02~beta2-36ubuntu3.22 ProcVersionSignature: Ubuntu 4.15.0-58.64~16.04.1-generic 4.15.18 Uname: Linux 4.15.0-58-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.19 Architecture: amd64 Date: Thu Aug 15 23:18:18 2019 DuplicateSignature: package:grub-efi-amd64-signed:1.66.22+2.02~beta2-36ubuntu3.22 Setting up grub-efi-amd64-signed (1.66.22+2.02~beta2-36ubuntu3.22) ... grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory. dpkg: error processing package grub-efi-amd64-signed (--configure): subprocess installed post-installation script returned error exit status 1 ErrorMessage: subprocess installed post-installation script returned error exit status 1 RelatedPackageVersions: dpkg 1.18.4ubuntu1.6 apt 1.2.32 SourcePackage: grub2-signed Title: package grub-efi-amd64-signed 1.66.22+2.02~beta2-36ubuntu3.22 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 UpgradeStatus: Upgraded to xenial on 2019-08-15 (0 days ago) ** Affects: grub2-signed (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-package third-party-packages xenial -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1840381 Title: package grub-efi-amd64-signed 1.66.22+2.02~beta2-36ubuntu3.22 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-signed/+bug/1840381/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs