[Bug 1694092] Re: package shim-signed 1.28~16.04.1+0.9+1474479173.6c180c6-1ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Steve Langasek]

This bug report shows that your system is being upgraded, and that you
previously had shim-signed and grub-efi-amd64-signed installed; but your
system appears to not be booted as an EFI system.  Did you initially
install this system as EFI, but then make changes to the booting of the
system to run it in BIOS mode?

** Changed in: shim-signed (Ubuntu)
       Status: New => Incomplete

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Title:
  package shim-signed 1.28~16.04.1+0.9+1474479173.6c180c6-1ubuntu1
  failed to install/upgrade: subprocess installed post-installation
  script returned error exit status 1

Status in shim-signed package in Ubuntu:
  Incomplete

Bug description:
  can't add anything else to this report.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: shim-signed 1.28~16.04.1+0.9+1474479173.6c180c6-1ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
  Uname: Linux 4.4.0-59-generic x86_64
  .proc.sys.kernel.moksbstate_disabled: 0
  .sys.firmware.efi.efivars.MokSBStateRT-605dab50-e046-4300-abb6-3dd810dd8b23: Error: [Errno 2] No such file or directory: '/sys/firmware/efi/efivars/MokSBStateRT-605dab50-e046-4300-abb6-3dd810dd8b23'
  .sys.firmware.efi.efivars.SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c: Error: [Errno 2] No such file or directory: '/sys/firmware/efi/efivars/SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c'
  ApportVersion: 2.20.1-0ubuntu2.6
  Architecture: amd64
  BootEFIContents:
   fw
   fwupx64.efi
  Date: Sun May 28 13:20:58 2017
  DuplicateSignature:
   package:shim-signed:1.28~16.04.1+0.9+1474479173.6c180c6-1ubuntu1
   Setting up grub-efi-amd64-signed (1.66.9+2.02~beta2-36ubuntu3.9) ...
   grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --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 1.18.4ubuntu1.2
   apt  1.2.20
  SourcePackage: shim-signed
  Title: package shim-signed 1.28~16.04.1+0.9+1474479173.6c180c6-1ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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