[Bug 1132497] [NEW] installer crashes if you don't create a /boot partition

[cheater]

Public bug reported:

i created a logical partition for swap and one for / using btrfs (both
in the same extended partition). this is on a macbook pro retina 15.4".
i am booting using rEFIt off a usb drive that contains the installer
that has been "converted to support efi". /dev/sda is a GPT partition,
and it contains osx. the installer could not install grub onto that
partition and rightly so (it would just mess up mac os). suggested fix:
detect this situation and require a /boot partition.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: ubiquity 2.12.16
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
ApportVersion: 2.6.1-0ubuntu3
Architecture: amd64
CasperVersion: 1.328
Date: Sun Feb 24 18:14:39 2013
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Release amd64+mac (20121017.3)
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug efi gpt macbook quantal refit retina ubiquity-2.12.16

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https://bugs.launchpad.net/bugs/1132497

Title:
  installer crashes if you don't create a /boot partition

Status in “grub-installer” package in Ubuntu:
  New

Bug description:
  i created a logical partition for swap and one for / using btrfs (both
  in the same extended partition). this is on a macbook pro retina
  15.4". i am booting using rEFIt off a usb drive that contains the
  installer that has been "converted to support efi". /dev/sda is a GPT
  partition, and it contains osx. the installer could not install grub
  onto that partition and rightly so (it would just mess up mac os).
  suggested fix: detect this situation and require a /boot partition.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.10
  Package: ubiquity 2.12.16
  ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
  Uname: Linux 3.5.0-17-generic x86_64
  ApportVersion: 2.6.1-0ubuntu3
  Architecture: amd64
  CasperVersion: 1.328
  Date: Sun Feb 24 18:14:39 2013
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
  LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Release amd64+mac (20121017.3)
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
   LANG=en_US.UTF-8
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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