[Bug 1770075] Re: fatal error, unable to install ubuntu 16.04, grub installer problem

[dino99]

*** This bug is a duplicate of bug 1767703 ***
    https://bugs.launchpad.net/bugs/1767703

Error:

grub-installer: Installing for x86_64-efi platform.
kernel: [  986.571266] FAT-fs (sda2): error, corrupted directory (invalid entries)
grub-installer: grub-install: error: cannot open `/boot/efi/EFI/ubuntu/shimx64.efi': Input/output error.
kernel: [  995.537581] FAT-fs (sda2): error, corrupted directory (invalid entries)
grub-installer: error: Running 'grub-install  --force "/dev/sda"' failed.


** This bug has been marked a duplicate of bug 1767703
   Calling 'apt-install grub-efi-amd64-signed' failed

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https://bugs.launchpad.net/bugs/1770075

Title:
  fatal error, unable to install ubuntu 16.04,grub installer problem

Status in grub-installer package in Ubuntu:
  New

Bug description:
  Unable to install ubuntu 16.04.4,
   while installing showing fatal error.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63.6
  ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13
  Uname: Linux 4.13.0-36-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  CasperVersion: 1.376.2
  Date: Wed May  9 08:28:07 2018
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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