package grub-efi-amd64-signed 1.34.4+2.02~beta2-9ubuntu1.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Owen Pimm]

Partial update of 14.04 LTS failed. Auto bug report generated.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: grub-efi-amd64-signed 1.34.4+2.02~beta2-9ubuntu1.3
ProcVersionSignature: Ubuntu 3.13.0-49.83-generic 3.13.11-ckt17
Uname: Linux 3.13.0-49-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
Date: Sat Jul 4 20:28:57 2015
DuplicateSignature: package:grub-efi-amd64-signed:1.34.4+2.02~beta2-9ubuntu1.3:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationDate: Installed on 2014-04-18 (441 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.34.4+2.02~beta2-9ubuntu1.3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Ronald (rbski69)]

happened during update