package grub-efi-amd64-signed 1.66.9+2.02~beta2-36ubuntu3.9 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

probleme recurrent avec grub-efi

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: grub-efi-amd64-signed 1.66.9+2.02~beta2-36ubuntu3.9
ProcVersionSignature: Ubuntu 4.4.0-71.92-generic 4.4.49
Uname: Linux 4.4.0-71-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
Date: Wed Apr 5 13:37:10 2017
DuplicateSignature:
 package:grub-efi-amd64-signed:1.66.9+2.02~beta2-36ubuntu3.9
 Setting up grub-efi-amd64-signed (1.66.9+2.02~beta2-36ubuntu3.9) ...
 grub-install : erreur : /usr/lib/grub/i386-pc/modinfo.sh n'existe pas. Veuillez utiliser --target ou --directory.
 dpkg: error processing package grub-efi-amd64-signed (--configure):
  subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.19
SourcePackage: grub2-signed
Title: package grub-efi-amd64-signed 1.66.9+2.02~beta2-36ubuntu3.9 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)