[Bug 1940497] [NEW] Grub installation failed during Ubuntu installation, readonly filesystem

[Michael Duckwitz]

Public bug reported:

Tried to install Ubuntu alongside Windows 10.  It failed when it tried
to install Grub.  The error said the target location was a read-only
filesystem.

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: ubiquity 21.04.19
ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12
Uname: Linux 5.11.0-16-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu65
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.461
Date: Wed Aug 18 22:36:10 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
RebootRequiredPkgs:
 linux-image-5.11.0-16-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 hirsute ubiquity-21.04.19 ubuntu

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https://bugs.launchpad.net/bugs/1940497

Title:
  Grub installation failed during Ubuntu installation, readonly
  filesystem

Status in grub-installer package in Ubuntu:
  New

Bug description:
  Tried to install Ubuntu alongside Windows 10.  It failed when it tried
  to install Grub.  The error said the target location was a read-only
  filesystem.

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: ubiquity 21.04.19
  ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12
  Uname: Linux 5.11.0-16-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu65
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.461
  Date: Wed Aug 18 22:36:10 2021
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
  RebootRequiredPkgs:
   linux-image-5.11.0-16-generic
   linux-base
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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