[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]

I know it's a dirty workaround, anyway here it is some useful info.
Just a note: I'm using a late 2011 iMac, with triple boot (OSX, Windows 10, Ubuntu), and using refind as boot manager.
I was using Ubuntu 16.04 before this upgrade. 

If you need additional info, I'm happy to contribute!

root at headache:~# cat /etc/fstab 
# / was on /dev/sdb5 during installation
UUID=7a938125-aa7c-4c10-ac1a-d3e941b93960 /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/sda1 during installation
#UUID=70D6-1701  /boot/efi       vfat    umask=0077      0       1
# swap was on /dev/sdb6 during installation
UUID=55df36ca-4888-46a7-bc9f-ec71dd8caa23 none            swap    sw              0       0

root at headache:~# uname -a
Linux headache 4.10.0-28-generic #32-Ubuntu SMP Fri Jun 30 05:32:18 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

root at headache:~# [ -d /sys/firmware/efi ] && echo UEFI || echo BIOS
UEFI

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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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