[Bug 1707497] Re: package shim-signed 1.32~17.04.1+0.9+1474479173.6c180c6-1ubuntu1 failed to install/upgrade: il sottoprocesso installato script di post-installation ha restituito lo stato di errore 1

[Scognito]

No, there is a little chance that I changed it manually but I've
installed it many months ago...maybe could be it be the root cause? I
really don't remember if I manually touched fstab...so it could be my
fault...

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Title:
  package shim-signed 1.32~17.04.1+0.9+1474479173.6c180c6-1ubuntu1
  failed to install/upgrade: il sottoprocesso installato script di post-
  installation ha restituito lo stato di errore 1

Status in shim-signed package in Ubuntu:
  Incomplete

Bug description:
  Setting up shim-signed (1.32~17.04.1+0.9+1474479173.6c180c6-1ubuntu1) ...
  Installing for x86_64-efi platform.
  grub-install: error: cannot find EFI directory.
  dpkg: error processing package shim-signed (--configure):
   subprocess installed post-installation script returned error exit status 1
  Setting up grub-efi-amd64-signed (1.80.2+2.02~beta3-4ubuntu2.2) ...
  Installing for x86_64-efi platform.
  grub-install: error: cannot find EFI directory.
  dpkg: error processing package grub-efi-amd64-signed (--configure):
   subprocess installed post-installation script returned error exit status 1
  Errors were encountered while processing:
   shim-signed
   grub-efi-amd64-signed

  ProblemType: Package
  DistroRelease: Ubuntu 17.04
  Package: shim-signed 1.32~17.04.1+0.9+1474479173.6c180c6-1ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-87.110-generic 4.4.73
  Uname: Linux 4.4.0-87-generic x86_64
  .proc.sys.kernel.moksbstate_disabled: 0
  ApportVersion: 2.20.4-0ubuntu4.5
  Architecture: amd64
  BootEFIContents:
   fw
   fwupx64.efi
  Date: Sun Jul 30 13:39:44 2017
  EFITables:
   lug 30 13:06:53 headache kernel: efi: EFI v1.10 by Apple
   lug 30 13:06:53 headache kernel: efi:  ACPI=0x8ed8e000  ACPI 2.0=0x8ed8e014  SMBIOS=0x8ed35000
  ErrorMessage: il sottoprocesso installato script di post-installation ha restituito lo stato di errore 1
  InstallationDate: Installed on 2016-07-20 (374 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  RelatedPackageVersions:
   dpkg 1.18.10ubuntu2
   apt  1.4
  SourcePackage: shim-signed
  Title: package shim-signed 1.32~17.04.1+0.9+1474479173.6c180c6-1ubuntu1 failed to install/upgrade: il sottoprocesso installato script di post-installation ha restituito lo stato di errore 1
  UpgradeStatus: Upgraded to zesty on 2017-07-30 (0 days ago)

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