Ubiquity fatal error : "cannot create grub on /dev/sda"

[Jacob Vlijm]

On 21.04 install, early in the process, "ubi-partman failed with exit code 141. Then on choosing "retry", all seems to succeed. At the end of the install however: "fatal error : "cannot create grub on /dev/sda"

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: ubiquity 21.04.12
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: Tue Mar 30 23:22:17 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-budgie.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu-Budgie 21.04 "Hirsute Hippo" - Beta amd64 (20210330)
RebootRequiredPkgs:
 linux-image-5.11.0-11-generic
 linux-base
SourcePackage: grub-installer
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/1921958

[Brian Murray (brian-murray)]

From ubiquity syslog:

Mar 30 21:19:08 ubuntu-budgie grub-installer: info: Identified partition label for /dev/sda9: msdos
Mar 30 21:19:09 ubuntu-budgie grub-installer: info: Installing grub on '/dev/sda'
Mar 30 21:19:09 ubuntu-budgie grub-installer: info: grub-install does not support --no-floppy
Mar 30 21:19:09 ubuntu-budgie grub-installer: info: Running chroot /target grub-install --force --target x86_64-efi "/dev/sda"
Mar 30 21:19:09 ubuntu-budgie grub-installer: Installeren voor x86_64-efi-platform.
Mar 30 21:19:15 ubuntu-budgie budgie-wm.desktop[6990]: Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x4400084
Mar 30 21:19:19 ubuntu-budgie budgie-wm.desktop[6990]: Window manager warning: Ping serial 1492907 was reused for window 0x40047db, previous use was for window 0x4000007.
Mar 30 21:19:22 ubuntu-budgie grub-installer: grub-install: waarschuwing: Internal error.
Mar 30 21:19:22 ubuntu-budgie grub-installer: grub-install: fout: kon de EFI-opstartregel niet registreren: Actie is niet toegestaan.
Mar 30 21:19:22 ubuntu-budgie grub-installer: error: Running 'grub-install --force --target x86_64-efi "/dev/sda"' failed.