[Bug 1930967] [NEW] Fatal error with Grub on installing Ubuntu with Win10 on dual boot basis

[C K Patel]

Public bug reported:

I got a fatal error while installing Ubuntu on a system where win10 was
pre-existing. The error message has something to do with Grub

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
CurrentDesktop: ubuntu:GNOME
Date: Sat Jun  5 15:19:09 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
ProcEnviron:
 LANGUAGE=en_IN
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_IN
 LC_NUMERIC=C.UTF-8
RebootRequiredPkgs:
 linux-image-5.11.0-16-generic
 linux-base
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug hirsute ubiquity-21.04.19 ubuntu

** Attachment added: "syslog"
   https://bugs.launchpad.net/bugs/1930967/+attachment/5502592/+files/syslog

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https://bugs.launchpad.net/bugs/1930967

Title:
  Fatal error with Grub on installing Ubuntu with Win10 on dual boot
  basis

Status in ubiquity package in Ubuntu:
  New

Bug description:
  I got a fatal error while installing Ubuntu on a system where win10
  was pre-existing. The error message has something to do with Grub

  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
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Jun  5 15:19:09 2021
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
  ProcEnviron:
   LANGUAGE=en_IN
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_IN
   LC_NUMERIC=C.UTF-8
  RebootRequiredPkgs:
   linux-image-5.11.0-16-generic
   linux-base
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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