[Bug 1898845] [NEW] grub install failed fatal error

[fizallo]

Public bug reported:

I'm trying to install Ubuntu as dualboot to Windows 10. But every time,
grub fails to install. At the end of the installation, there's the error
"Grub installation failed. This is a fatal error. " I tried the
following things:

    secure boot is disabled

    fast boot ist disabled

    win is installed in EFI mode so of course I'm installing Ubuntu in
EFi mode too

Some more infos: It's a 64 Bit acer Laptop with UEFI, with an AMD Radeon
E2-9000e and a Radeon R2 graphic card and 4GB RAM DDR4 if that matters.
During the installation, I select something else, create a 245.7GB /
partition, a 4.2GB swap partition and around 200MB for EFI boot. After
the first time, the installation always says that ubuntu is already
installed, I guess that means only the grub installation failed, but
Ubuntu was installed. I googled a bit, but did not find anything that
worked.

By the way, the installation USB is probably not a problem, just tested
it on another PC and it worked instantly. I also tried both the "install
Ubuntu" option and the "try Ubuntu" and then installing it.

Does anyone know how to fix this?

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
CasperMD5CheckResult: pass
CasperVersion: 1.445.1
Date: Wed Oct  7 11:27:45 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/xubuntu.seed only-ubiquity quiet splash nomodeset ---
LiveMediaBuild: Xubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 LC_NUMERIC=C.UTF-8
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 xubuntu

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https://bugs.launchpad.net/bugs/1898845

Title:
  grub install failed fatal error

Status in grub-installer package in Ubuntu:
  New

Bug description:
  I'm trying to install Ubuntu as dualboot to Windows 10. But every
  time, grub fails to install. At the end of the installation, there's
  the error "Grub installation failed. This is a fatal error. " I tried
  the following things:

      secure boot is disabled

      fast boot ist disabled

      win is installed in EFI mode so of course I'm installing Ubuntu in
  EFi mode too

  Some more infos: It's a 64 Bit acer Laptop with UEFI, with an AMD
  Radeon E2-9000e and a Radeon R2 graphic card and 4GB RAM DDR4 if that
  matters. During the installation, I select something else, create a
  245.7GB / partition, a 4.2GB swap partition and around 200MB for EFI
  boot. After the first time, the installation always says that ubuntu
  is already installed, I guess that means only the grub installation
  failed, but Ubuntu was installed. I googled a bit, but did not find
  anything that worked.

  By the way, the installation USB is probably not a problem, just
  tested it on another PC and it worked instantly. I also tried both the
  "install Ubuntu" option and the "try Ubuntu" and then installing it.

  Does anyone know how to fix this?

  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
  CasperMD5CheckResult: pass
  CasperVersion: 1.445.1
  Date: Wed Oct  7 11:27:45 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/xubuntu.seed only-ubiquity quiet splash nomodeset ---
  LiveMediaBuild: Xubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  ProcEnviron:
   LANGUAGE=en_US.UTF-8
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   LC_NUMERIC=C.UTF-8
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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