[Bug 1770912] Re: grub installation fetal error

[dino99]

Looks like a corrupted support used. Lot of "Error retrieving chunk
extents: Operation not supported" logged.

First check the iso's md5sum, then how that iso has been burnt (maybe too quickly).
http://releases.ubuntu.com/18.04/
https://help.ubuntu.com/community/BurningIsoHowto

Indeed, if you can use an usb stick for installation, its a better solution.
https://www.makeuseof.com/tag/install-ubuntu-computer-using-usb-flash-drive/

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

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https://bugs.launchpad.net/bugs/1770912

Title:
  grub installation fetal error

Status in grub-installer package in Ubuntu:
  Incomplete

Bug description:
  not able to install bionic beaver due to grub 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: Sun May 13 14:41:36 2018
  InstallCmdLine: initrd=/casper/initrd.lz file=/cdrom/preseed/ubuntu.seed boot=casper  quiet splash --- BOOT_IMAGE=/casper/vmlinuz
  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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