package shim-signed 1.19~16.04.1+0.8-0ubuntu2 failed to install/upgrade: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 1

??

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: shim-signed 1.19~16.04.1+0.8-0ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
Uname: Linux 4.4.0-59-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
AptOrdering:
 libpcsclite1: Install
 shim-signed: Configure
 libpcsclite1: Configure
 NULL: ConfigurePending
Architecture: amd64
BootEFIContents:
 fw
 fwupx64.efi
Date: Tue Jan 24 04:33:14 2017
EFIBootMgr: Error: command ['efibootmgr', '-v'] failed with exit code 2: efibootmgr: EFI variables are not supported on this system.
ErrorMessage: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 1
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.18
SourcePackage: shim-signed
Title: package shim-signed 1.19~16.04.1+0.8-0ubuntu2 failed to install/upgrade: le sous-processus script post-installation installé a retourné une erreur de sortie d'état 1
UpgradeStatus: No upgrade log present (probably fresh install)