[Bug 1918262] [NEW] Impossible acces and reinstallation of Ubuntu after Windows 10 update

[ioan]

Public bug reported:

On a dualboot hdd (Ubuntu & Windows), After february update of Window 10 the ubuntu partition has disappeared, (it is now marked as unused) and while tryning to reinstall ubuntu there is no possibility of reinstalling the grub-loader.
thank you,
Ioan

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CasperVersion: 1.394
Date: Tue Mar  9 10:13:07 2021
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic ubiquity-18.04.14 ubuntu

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https://bugs.launchpad.net/bugs/1918262

Title:
  Impossible acces and reinstallation of Ubuntu after Windows 10 update

Status in grub-installer package in Ubuntu:
  New

Bug description:
  On a dualboot hdd (Ubuntu & Windows), After february update of Window 10 the ubuntu partition has disappeared, (it is now marked as unused) and while tryning to reinstall ubuntu there is no possibility of reinstalling the grub-loader.
  thank you,
  Ioan

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubiquity 18.04.14
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CasperVersion: 1.394
  Date: Tue Mar  9 10:13:07 2021
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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