[Bug 1800340] Re: installation of grub-efi-amd64-signed fails due to "efibootmgr failed to register the boot entry: Input/output error."

[Karl-Philipp Richter]

** Bug watch added: GNU Savannah Bug Tracker #55005
   http://savannah.gnu.org/bugs/?55005

** Also affects: grub via
   http://savannah.gnu.org/bugs/?55005
   Importance: Unknown
       Status: Unknown

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Title:
  installation of grub-efi-amd64-signed fails due to "efibootmgr failed
  to register the boot entry: Input/output error."

Status in grub:
  Unknown
Status in grub2-signed package in Ubuntu:
  New

Bug description:
  After an upgrade from 18.04 to 18.10 the installation of grub-efi-
  amd64-signed fails due to

  ```
  Setting up grub-efi-amd64-signed (1.110+2.02+dfsg1-5ubuntu8) ...
  Installing for x86_64-efi platform.
  Could not prepare Boot variable: Invalid argument
  grub-install: error: efibootmgr failed to register the boot entry: Input/output error.
  dpkg: error processing package grub-efi-amd64-signed (--configure):
   installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  Errors were encountered while processing:
   grub-efi-amd64-signed
  ```

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: grub-efi-amd64-signed 1.110+2.02+dfsg1-5ubuntu8
  ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
  Uname: Linux 4.18.0-10-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.10-0ubuntu13
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Oct 28 12:28:01 2018
  SourcePackage: grub2-signed
  UpgradeStatus: Upgraded to cosmic on 2018-10-21 (6 days ago)

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