xubuntu qa-test install; hirsute; BIOS box, two partitions sda1 & sda2, replace sda2

[Chris Guiver]

Xubuntu QA-test install (hirsute daily) on
- dell [optiplex] 755 (c2d-e8300, 8gb, amd/ati radeon rv610/radeon hd2400 pro/xt)

Box (BIOS) has two partitions, 2x hirsute installs
(originally a full disk install + subsequent install.alongside)

Selected SDA2 or later install partition; it was used as "/" with ext4 new format

In messages I see
---
Mar 25 05:28:43 xubuntu grub-installer: Installing for x86_64-efi platform.
Mar 25 05:28:54 xubuntu grub-installer: grub-install: error: cannot copy `/usr/lib/grub/x86_64-efi-signed/grubx64.efi.signed' to `/boot/efi/EFI/ubuntu/grubx64.efi': No space left on device.
Mar 25 05:28:54 xubuntu grub-installer: error: Running 'grub-install --force --target x86_64-efi "/dev/sda"' failed.
----

but box isn't uEFI ! and has no EFI partition (a full disk install didn't create one)

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: ubiquity 21.04.11
ProcVersionSignature: Ubuntu 5.11.0-11.12-generic 5.11.0
Uname: Linux 5.11.0-11-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu61
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.461
Date: Thu Mar 25 16:34:45 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/xubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Xubuntu 21.04 "Hirsute Hippo" - Alpha amd64 (20210325)
ProcEnviron:
 LANGUAGE=en_AU.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_AU.UTF-8
 LC_NUMERIC=C.UTF-8
RebootRequiredPkgs:
 linux-image-5.11.0-11-generic
 linux-base
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1921321