(16.04, non-UEFI) package shim-signed 1.19~16.04.1+0.8-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

release 1.19 didn't solve the problêm

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
Architecture: amd64
BootEFIContents:
 fw
 fwupx64.efi
Date: Wed Feb 8 21:05:17 2017
DuplicateSignature:
 package:shim-signed:1.19~16.04.1+0.8-0ubuntu2
 Setting up grub-efi-amd64-signed (1.66.7+2.02~beta2-36ubuntu3.7) ...
 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
EFIBootMgr: Error: command ['efibootmgr', '-v'] failed with exit code 2: efibootmgr: EFI variables are not supported on this system.
ErrorMessage: subprocess installed post-installation script returned error exit status 1
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.19
SourcePackage: shim-signed
Title: package shim-signed 1.19~16.04.1+0.8-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)