[Bug 1901554] Re: Install Ubuntu 20.10 crash at grub-install /dev/sda

[marcello]

*** This bug is a duplicate of bug 1901137 ***
    https://bugs.launchpad.net/bugs/1901137

I think this is a possible duplicate of 
https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1893964

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https://bugs.launchpad.net/bugs/1901554

Title:
  Install Ubuntu 20.10 crash at grub-install /dev/sda

Status in grub-installer package in Ubuntu:
  Confirmed

Bug description:
  Installing Ubuntu 20.10 from USB Live failed at gru-install /dev/sda!
  I think problem has to do with UEFI/Legacy installation type.
  My system has already Windows 10 installed on /dev/sda2 and ubuntu 20.04 on /dev/sda7 in legacy mode, even if my system BIOS seems to support UEFI mode, I never used it!
  After the error if I open a terminal and try to enter command "grub-install /dev/sda" it return:
  ubuntu at ubuntu:/$ grub-install /dev/sda
  Installing for x86_64-efi platform.
  grub-install: error: cannot find EFI directory.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.10
  Package: ubiquity 20.10.13
  ProcVersionSignature: Ubuntu 5.8.0-25.26-generic 5.8.14
  Uname: Linux 5.8.0-25-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu50
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.455
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Oct 26 15:12:35 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
  ProcEnviron:
   LANGUAGE=en_US.UTF-8
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   LC_NUMERIC=C.UTF-8
  RebootRequiredPkgs:
   linux-image-5.8.0-25-generic
   linux-base
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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