[Bug 1778230] Re: package shim-signed 1.34.9+13-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1

[Steve Langasek]

This particular error means that:
- your system supports UEFI
- your system was previously installed in BIOS mode
- the Ubuntu install image was booted in UEFI mode and tried to reinstall in UEFI mode, but this failed because you don't have an EFI system partition
- you had a previous BIOS bootloader present on disk, so the system still booted after installation.

That is bug #1766945.

If you were dual-booting and the other OS is not listed in your GRUB
boot menu now, that is unfortunately unrelated to the above sequence
that led to you being prompted to file this bug report.

It is possible that running 'sudo update-grub', now that the
installation is finished, would be enough to restore your dual-boot
option in the boot menu.  If it does not, more information would be
needed about your setup to understand why it's not being detected by os-
prober.

** Package changed: shim-signed (Ubuntu) => grub2 (Ubuntu)

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https://bugs.launchpad.net/bugs/1778230

Title:
  package shim-signed 1.34.9+13-0ubuntu2 failed to install/upgrade:
  installed shim-signed package post-installation script subprocess
  returned error exit status 1

Status in grub2 package in Ubuntu:
  New

Bug description:
  When reinstalling Ubuntu this error occur and installation got
  aborted. I have dual booted system but now grub don't ask for
  selecting OS,it directly boot into Ubuntu.

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: shim-signed 1.34.9+13-0ubuntu2
  ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
  Uname: Linux 4.15.0-23-generic x86_64
  .proc.sys.kernel.moksbstate_disabled: Error: [Errno 2] No such file or directory: '/proc/sys/kernel/moksbstate_disabled'
  ApportVersion: 2.20.9-0ubuntu7
  AptOrdering:
   shim:amd64: Install
   shim-signed:amd64: Install
   NULL: ConfigurePending
  Architecture: amd64
  BootEFIContents:
   fw
   fwupx64.efi
  Date: Fri Jun 22 18:20:28 2018
  Df:
   Filesystem     1K-blocks    Used Available Use% Mounted on
   /dev/sda8       62695244 9727612  49753092  17% /
   /dev/sdb1        7799276 1875436   5923840  25% /cdrom
   udev             1943548       0   1943548   0% /dev
   tmpfs             392948    1728    391220   1% /run
  EFIBootMgr: Error: command ['efibootmgr', '-v'] failed with exit code 2: EFI variables are not supported on this system.
  EFITables: Jun 22 18:26:11 Aditya-PC fwupd[2573]: disabling plugin because: failed to startup uefi: error listing variables: Function not implemented
  ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 1
  Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3
  PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu2
   apt  1.6.1
  SourcePackage: shim-signed
  Title: package shim-signed 1.34.9+13-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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