[Bug 1683663] Re: (non-UEFI, 17.04 fresh install) package shim-signed 1.28+0.9+1474479173.6c180c6-1ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

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

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Title:
  (non-UEFI, 17.04 fresh install) package shim-signed
  1.28+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:
  Confirmed

Bug description:
  during upgrading of lubuntu 14.10 on my Asus X200CA laptop to lubuntu
  17.04, the grub2 installation part failed. however, on restarting the
  computer, the laptop booted normally, but got this error automatically
  after booting. not much of an issue for me, but reporting nonetheless.

  ProblemType: Package
  DistroRelease: Ubuntu 17.04
  Package: shim-signed 1.28+0.9+1474479173.6c180c6-1ubuntu1
  ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
  Uname: Linux 4.10.0-19-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: 2.20.4-0ubuntu4
  AptOrdering:
   shim:amd64: Install
   shim-signed:amd64: Install
   NULL: ConfigurePending
  Architecture: amd64
  BootEFIContents:
   fw
   fwupx64.efi
  Date: Tue Apr 18 13:01:02 2017
  Df:
   Filesystem     1K-blocks     Used Available Use% Mounted on
   /dev/sda1      151755932 97539348  46484720  68% /
   /dev/sdb1        7545436  1982304   5563132  27% /cdrom
   udev              914884        0    914884   0% /dev
   tmpfs             186192     8192    178000   5% /run
  EFIBootMgr: Error: command ['efibootmgr', '-v'] failed with exit code 2: EFI variables are not supported on this system.
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  RelatedPackageVersions:
   dpkg 1.18.10ubuntu2
   apt  1.4
  SourcePackage: shim-signed
  Title: package shim-signed 1.28+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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