[Bug 1694446] Re: Installer crashes when trying to upgrade 32-bit system to 64-bit

[Gerv]

"A warning message prompted you that this could be a problem and
recommended performing a bios mode install instead, but you chose not
to."

That's not entirely right. The warning message said that there would be
a possible problem booting _other_ operating systems installed on the
disk afterwards. As I had no other operating systems other than the one
I was upgrading, I chose to continue. If in fact there are other reasons
for not continuing in this situation, the message needs updating to be
more clear and explain what to do differently . So I am reopening this
bug.

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

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https://bugs.launchpad.net/bugs/1694446

Title:
  Installer crashes when trying to upgrade 32-bit system to 64-bit

Status in grub-installer package in Ubuntu:
  New

Bug description:
  I was surprised when Ubuntu let me try and upgrade a 32-bit 14.04 to a
  64-bit 16.04. Is that supported? If not, it should be stopped with an
  error early on. If it is supported, then, well, I got this crash. Of
  course, it may not be related, and the 32/64 thing may be a
  coincidence...

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63.3 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11
  Uname: Linux 4.8.0-36-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  CasperVersion: 1.376.2
  Date: Tue May 30 14:54:56 2017
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
  ProcEnviron:
   LANGUAGE=en_GB.UTF-8
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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