[Bug 1922084] [NEW] ubuntu 20.10 won't add boot entry under legacy mode - worked on 20.04

[robert hacking]

Public bug reported:

Installation ok until it is about toenter the entry to the boot table - then it fails. 
If you manually add the boot entry - then it all works .

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
Date: Wed Mar 31 13:40:03 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
RebootRequiredPkgs:
 linux-image-5.8.0-25-generic
 linux-base
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-20.10.13 ubuntu

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https://bugs.launchpad.net/bugs/1922084

Title:
  ubuntu 20.10 won't add boot entry under legacy mode - worked on 20.04

Status in grub-installer package in Ubuntu:
  New

Bug description:
  Installation ok until it is about toenter the entry to the boot table - then it fails. 
  If you manually add the boot entry - then it all works .

  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
  Date: Wed Mar 31 13:40:03 2021
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
  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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