[Bug 1581895] [NEW] Grub fails to install from ISO boot with existing Win10 install

[jhansonxi]

Public bug reported:

UEFI NextBook 11 tablet with Win10
Ubuntu 16.04 x86_64
Loopback ISO boot from Grub2 on USB Flash drive.
Ubuntu installer (after many rounds of fighting over partition editing with ISO mounted) completes most of installation only to have Grub install fail.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CasperVersion: 1.376
Date: Sat May 14 19:44:00 2016
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi boot=casper iso-scan/filename=/ubuntu-16.04-desktop-amd64.iso noprompt noeject
LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug ubiquity-2.21.63 xenial

** Summary changed:

- Grub fails to inistall from ISO boot with existing Win10 install 
+ Grub fails to install from ISO boot with existing Win10 install

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https://bugs.launchpad.net/bugs/1581895

Title:
  Grub fails to install from ISO boot with existing Win10 install

Status in grub-installer package in Ubuntu:
  New

Bug description:
  UEFI NextBook 11 tablet with Win10
  Ubuntu 16.04 x86_64
  Loopback ISO boot from Grub2 on USB Flash drive.
  Ubuntu installer (after many rounds of fighting over partition editing with ISO mounted) completes most of installation only to have Grub install fail.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.376
  Date: Sat May 14 19:44:00 2016
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi boot=casper iso-scan/filename=/ubuntu-16.04-desktop-amd64.iso noprompt noeject
  LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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