Public bug reported: I switched from Legacy to EFI boot using a live CD and boot-repair. The system booted fine, but when running a software update, an error message appeared, asking me to report a bug, so here it is.
Ubuntu Gnome 15.10 ProblemType: Package DistroRelease: Ubuntu 15.10 Package: grub-efi-amd64 2.02~beta2-29ubuntu0.3 ProcVersionSignature: Ubuntu 4.2.0-25.30-generic 4.2.6 Uname: Linux 4.2.0-25-generic x86_64 ApportVersion: 2.19.1-0ubuntu5 Architecture: amd64 Date: Wed Jan 27 23:47:48 2016 Df: ErrorMessage: subprocess installed post-installation script returned error exit status 1 InstallationDate: Installed on 2016-01-26 (1 days ago) InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Release amd64 (20151021) InvalidGrubScript: /etc/grub.d/25_custom ProcCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-25-generic.efi.signed root=/dev/mapper/sysvg-lvroot ro quiet splash vt.handoff=7 RelatedPackageVersions: dpkg 1.18.2ubuntu5.1 apt 1.0.10.2ubuntu1 SourcePackage: grub2 Title: package grub-efi-amd64 2.02~beta2-29ubuntu0.3 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 wily -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1538797 Title: package grub-efi-amd64 2.02~beta2-29ubuntu0.3 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/1538797/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs