[Bug 1770842] Re: Installing 18.04 to replace 17.04 failled with GRUB install error

[dino99]

Error: "grub-install : erreur : impossible de trouver le répertoire
EFI."

see lp:1767703

** Changed in: grub-installer (Ubuntu)
       Status: New => Incomplete

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Title:
  Installing 18.04 to replace 17.04 failled with GRUB install error

Status in grub-installer package in Ubuntu:
  Incomplete

Bug description:
  Installing 18.04 to replace 17.04 failled with GRUB install error

  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: Sat May 12 15:30:45 2018
  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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