[Bug 1639374] Re: grub-pc fails to remove, rendering lubuntu uninstallable on EFI machines

[apt-ghetto]

I have tested the installation of Lubuntu 16.10 in UEFI mode, with
internet connection in a virtual machine. The option "Downloading
updates while installing" was disabled. The installation fails, but the
installer does not crash.

** Attachment added: "with internet, no updates"
   https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1639374/+attachment/4833944/+files/syslogB.txt

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https://bugs.launchpad.net/bugs/1639374

Title:
  grub-pc fails to remove, rendering lubuntu uninstallable on EFI
  machines

Status in grub2 package in Ubuntu:
  Incomplete

Bug description:
  Crashed during install

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: ubiquity 16.10.14
  ProcVersionSignature: Ubuntu 4.8.0-22.24-generic 4.8.0
  Uname: Linux 4.8.0-22-generic x86_64
  ApportVersion: 2.20.3-0ubuntu8
  Architecture: amd64
  CasperVersion: 1.379
  Date: Fri Nov  4 18:31:30 2016
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/lubuntu.seed cdrom-detect/try-usb=true persistent noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper only-ubiquity quiet splash ---
  LiveMediaBuild: Lubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.1)
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   LC_NUMERIC=C.UTF-8
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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