[Bug 1930144] [NEW] executing 'grub-install /dev/sda' failed. this is a fatal error

[Sajad]

Public bug reported:

while installing ubuntu 20 alongside windows this error appeared

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15.2
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckMismatches: ./pool/main/g/gcc-10/libtsan0_10-20200411-0ubuntu1_amd64.deb
CasperMD5CheckResult: skip
CasperVersion: 1.445.1
Date: Sun May 30 04:42:33 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash --- acpi=off
LiveMediaBuild: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal ubiquity-20.04.15.2 ubuntu

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https://bugs.launchpad.net/bugs/1930144

Title:
  executing 'grub-install /dev/sda' failed. this is a fatal error

Status in grub-installer package in Ubuntu:
  New

Bug description:
  while installing ubuntu 20 alongside windows this error appeared

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.15.2
  ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
  Uname: Linux 5.4.0-42-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27.4
  Architecture: amd64
  CasperMD5CheckMismatches: ./pool/main/g/gcc-10/libtsan0_10-20200411-0ubuntu1_amd64.deb
  CasperMD5CheckResult: skip
  CasperVersion: 1.445.1
  Date: Sun May 30 04:42:33 2021
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash --- acpi=off
  LiveMediaBuild: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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