[Bug 1874976] [NEW] Chosen ubuntu partition bootloader on GPT disk

[Pihhan]

Public bug reported:

Because I already have Fedora installed on my computer, I have chosen
partition of Ubuntu to contain boot loader. I expected to boot ubuntu by
chain loading from Fedora. I want my bootloader untouched on disk
loading. Had my disk custom assigned, partitions kept.

However, during installation, grub installation failed. I selected
continue without grub installation. But that failed whole installation.

Expected warning to show, telling I have to fix bootloading manually or
retry. It might also stop me from choosing partition as bootloader, if
GPT cannot support it.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.445
CurrentDesktop: ubuntu:GNOME
Date: Sat Apr 25 08:54:52 2020
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed initrd=/casper/initrd quiet splash --- maybe-ubiquity
LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
ProcEnviron:
 LANGUAGE=cs_CZ.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=cs_CZ.UTF-8
 LC_NUMERIC=C.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 focal ubiquity-20.04.15 ubuntu

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https://bugs.launchpad.net/bugs/1874976

Title:
  Chosen ubuntu partition bootloader on GPT disk

Status in grub-installer package in Ubuntu:
  New

Bug description:
  Because I already have Fedora installed on my computer, I have chosen
  partition of Ubuntu to contain boot loader. I expected to boot ubuntu
  by chain loading from Fedora. I want my bootloader untouched on disk
  loading. Had my disk custom assigned, partitions kept.

  However, during installation, grub installation failed. I selected
  continue without grub installation. But that failed whole
  installation.

  Expected warning to show, telling I have to fix bootloading manually
  or retry. It might also stop me from choosing partition as bootloader,
  if GPT cannot support it.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.15 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
  Uname: Linux 5.4.0-26-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.445
  CurrentDesktop: ubuntu:GNOME
  Date: Sat Apr 25 08:54:52 2020
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed initrd=/casper/initrd quiet splash --- maybe-ubiquity
  LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  ProcEnviron:
   LANGUAGE=cs_CZ.UTF-8
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=cs_CZ.UTF-8
   LC_NUMERIC=C.UTF-8
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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