[Bug 1690325] Re: During Installation; cannot write GRUB. USB3 target

[Phillip Susi]

Your EFI system partition is corrupt; you will need to repair it with
either dosfsck or Windows' chkdsk/scandisk.


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

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Title:
  During Installation; cannot write GRUB. USB3 target

Status in grub-installer package in Ubuntu:
  Invalid

Bug description:
  At end of installation it aborts saying it cannot write/install GRUB.
  Worked before, but now I end up with this installation abort
  regardless of if I try to install alongside Win 10 Creators or on a
  separate USB3 disk placing EFI and installation on it (dev/sdc1)

  What I really want is to make a self contained installation on a 32GB
  USB3 stick. It should be an installation option for this without need
  for messing with partition tables.

  I got it to work once, but then I had uninstalled windows and
  formatted blank the main disk. As soon as I reinstalled Windows 10
  Creator, the USB3 disk disappeared as bootable media!

  May it be that Win 10 Creator has tightened control of the UEFI, and
  that the installation have a bug, making it try touching the Windows
  UEFI even if the installation is directed at a different disk?

  Ubuntu 17.04, Lenovo Yoga3 pro 512GB SSD, Intel Core M-5Y71, Sandisk
  Cruser 32GB for live, Sandisk Cruser USB 3.0 for target. 256 Mb EFI
  rest 31 Gb / ext4. Target for boot dev/sdc. Online with mirrors during
  install.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: ubiquity 17.04.9
  ProcVersionSignature: Ubuntu 4.10.0-19.21-generic 4.10.8
  Uname: Linux 4.10.0-19-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.4-0ubuntu4
  Architecture: amd64
  CasperVersion: 1.380
  Date: Fri May 12 09:49:44 2017
  InstallCmdLine: BOOT_IMAGE=(hd0,4)/casper/vmlinuz.efi boot=casper quiet splash --
  LiveMediaBuild: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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