Public bug reported: I have no idea..
ProblemType: Package DistroRelease: Ubuntu 14.04 Package: grub-efi-amd64 2.02~beta2-9ubuntu1.15 ProcVersionSignature: Ubuntu 4.4.0-140.166~14.04.1-generic 4.4.162 Uname: Linux 4.4.0-140-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.29 Architecture: amd64 Date: Sat Dec 15 11:19:04 2018 DuplicateSignature: package:grub-efi-amd64:2.02~beta2-9ubuntu1.15:subprocess installed post-installation script returned error exit status 1 ErrorMessage: subprocess installed post-installation script returned error exit status 1 InstallationDate: Installed on 2015-12-30 (1080 days ago) InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-140-generic.efi.signed root=UUID=76ab8c28-cc19-4373-b92d-8bceebd70ac1 ro quiet splash vt.handoff=7 RelatedPackageVersions: dpkg 1.17.5ubuntu5.8 apt 1.0.1ubuntu2.18 SourcePackage: grub2 Title: package grub-efi-amd64 2.02~beta2-9ubuntu1.15 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: grub2 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-package trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1808596 Title: package grub-efi-amd64 2.02~beta2-9ubuntu1.15 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/1808596/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs