[Bug 1775368] [NEW] not able to install ubuntu 18.04

[mayank pant]

Public bug reported:

i had replaced windows with ubuntu previously, everything worked perfectly for one day then i restarted my windows, logged in my computer but everything froze only mouse was moving nothing else. i tried to solve this issue but could not do it. So i decided to reinstall ubuntu.
i had made bootable pendrive. i tried installing ubuntu from it using normal installation, connecting with internet and selecting erase everything but showed me grub2 installation something.
help pls, hoping fr ur speedy reply.

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: Wed Jun  6 14:41:22 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)

** 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/1775368

Title:
  not able to install ubuntu 18.04

Status in grub-installer package in Ubuntu:
  New

Bug description:
  i had replaced windows with ubuntu previously, everything worked perfectly for one day then i restarted my windows, logged in my computer but everything froze only mouse was moving nothing else. i tried to solve this issue but could not do it. So i decided to reinstall ubuntu.
  i had made bootable pendrive. i tried installing ubuntu from it using normal installation, connecting with internet and selecting erase everything but showed me grub2 installation something.
  help pls, hoping fr ur speedy reply.

  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: Wed Jun  6 14:41:22 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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