package grub-efi-amd64-signed 1.34.7+2.02~beta2-9ubuntu1.6 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Karl Sarnow]

Installation of update.

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: grub-efi-amd64-signed 1.34.7+2.02~beta2-9ubuntu1.6
ProcVersionSignature: Ubuntu 3.19.0-39.44~14.04.1-generic 3.19.8-ckt9
Uname: Linux 3.19.0-39-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
Date: Sat Dec 19 16:02:39 2015
DuplicateSignature: package:grub-efi-amd64-signed:1.34.7+2.02~beta2-9ubuntu1.6:subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
RelatedPackageVersions:
 dpkg 1.17.5ubuntu5.5
 apt 1.0.1ubuntu2.10
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.34.7+2.02~beta2-9ubuntu1.6 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.