*** This bug is a duplicate of bug 1886580 ***
    https://bugs.launchpad.net/bugs/1886580

Public bug reported:

Grub fails to install in VirtualBox installation of Ubuntu MATE Groovy
20.10 Aug 01, 2020 64-bit.

Note: This is a duplicate bug report similar to one filed on July 06,
2020:

https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1886580


Though I'm trying to install Ubuntu MATE Groovy in a VirtualBox installation, I 
like to make it clear that, this is a desktop PC with old-style BIOS (No UEFI 
at all).

Ubuntu MATE 20.10 daily live ISO I'm installing from is of Aug 01, 2020

VirtualBox version is: VirtualBox-6.1.97-139665-Linux_amd64, and it runs
Ubuntu MATE 20.04 Focal with kernel version 5.7.11


Issue: When I first tried to install it with just two partitions (like I always 
have up until now),

(1) First EXT4 partition of 22GB, and
(2) Second SWAP partition of 3GB;

installer displayed:

Error-1:
"No EFI System Partition was found. This system will likely not be able to boot 
successfully, and the installation process may fail. Please go back and add an 
EFI System Partition, or continue at your own risk".

and upon clicking Continue, it displayed:

Error-2:
"The partition table format in use on your disks normally requires you to 
create a separate partition for boot loader code. This partition should be 
marked as a "Reserved BIOS boot area" and should be at leat 1 MB in size. Note 
that thi is not the same as a partition mounted on /boot.

If you do not go back to the partitioning menu and correct this error,
boot loader installation may fail later, although it may still be
possible to install the boot loader to a partition".

So I went back and created:
(1) EFI partition 1GB
(2) Reserved BIOS boot area partition 1GB
(3) / EXT4 partition 20GB
(4) SWAP partition 3GB

So even with "EFI" and "biosgrub" partitions, grub fails to install on
either SDA/SDA1/SDA2/SDA3 with a message,

"Bootloader install failed: Sorry, an error occurred and it was not
possible to install the bootloader at the specified location".

Thanks.

ProblemType: Bug
DistroRelease: Ubuntu 20.10
Package: ubiquity 20.10.9
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: 2.20.11-0ubuntu43
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.452
Date: Sat Aug  1 08:45:58 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-mate.seed 
maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu-MATE 20.10 "Groovy Gorilla" - Alpha amd64 (20200801)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug groovy ubiquity-20.10.9 ubuntu-mate

** This bug has been marked a duplicate of bug 1886580
   Grub fails to install in a VirtualBox installation of Ubuntu MATE Groovy 
20.10 July 06, 2020

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https://bugs.launchpad.net/bugs/1889989

Title:
  Grub fails to install in a VirtualBox installation of Ubuntu MATE
  Groovy 20.10 Aug 01, 2020

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