[Bug 1447256] Re: "Force UEFI" dialog displayed if user selects custom partitioning

[Roderick Smith]

I encountered the same bug when I performed an installation that used
LVM (I selected the "Use LVM with the new Ubuntu installation" option).
When I opened a shell and examined the partition table, it appears that
it had already been created. (The disk was empty when I began.) The
partition table resembled the one that resulted after I completed the
installation, except that the to-be-ESP partition was set up as a
Microsoft Basic Data partition, not as an ESP. (Screen shot attached.)

It should also be noted that the error message refers to installing
Debian, not Ubuntu.

Overall, new users could be confused by this message. It deserves more
than a documentation fix.

** Attachment added: "Screen shot showing partition table at time the error message was displayed."
   https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1447256/+attachment/4414776/+files/partitions.png

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https://bugs.launchpad.net/bugs/1447256

Title:
  "Force UEFI" dialog displayed if user selects custom partitioning

Status in One Hundred Papercuts:
  Confirmed
Status in Release Notes for Ubuntu:
  Fix Released
Status in ubiquity package in Ubuntu:
  Confirmed

Bug description:
  vivid desktop amd64 20150422

  During installation on a blank disk on a UEFI system, if the user
  creates a custom partition, the installer displays the 'Force UEFI'
  dialog (screenshot) while there is no pre-installed system. This
  dialog is not displayed if the custom partitioner is not used.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: ubiquity 2.21.25
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  CasperVersion: 1.360
  Date: Wed Apr 22 13:00:04 2015
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  ProcEnviron:
   SHELL=/bin/bash
   TERM=linux
   PATH=(custom, no user)
   LANG=en_US.UTF-8
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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