[Bug 1440542] [NEW] Install fails when launched from on-disk loopback ISO

[Jim Patterson]

Public bug reported:

The Ubuntu installer fails when the system is booted from an on-disk ISO
through a Grub2 loopback, instead of the more common DVD or USB install
media. The system is able to boot successfully with this approach, but
the installer runs into issues. The first seems to be a failure to
configure the boot CD for apt updates (there is of course no boot CD).

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: ubiquity 2.21.17
ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
Uname: Linux 3.19.0-10-generic x86_64
ApportVersion: 2.16.2-0ubuntu4
Architecture: amd64
CasperVersion: 1.356
Date: Sun Apr  5 12:13:18 2015
InstallCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz.efi boot=casper iso-scan/filename=/Downloads/ubuntu-15.04-beta2-desktop-amd64.iso splash toram
LiveMediaBuild: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
ProcEnviron:
 LANGUAGE=en_CA.UTF-8
 PATH=(custom, no user)
 LANG=en_CA.UTF-8
 SHELL=/bin/bash
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug ubiquity-2.21.17 vivid

** Attachment added: "Screenshot - cannot configure apt CD update"
   https://bugs.launchpad.net/bugs/1440542/+attachment/4366663/+files/Screenshot%20from%202015-04-05%2012-06-43.png

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https://bugs.launchpad.net/bugs/1440542

Title:
  Install fails when launched from on-disk loopback ISO

Status in ubiquity package in Ubuntu:
  New

Bug description:
  The Ubuntu installer fails when the system is booted from an on-disk
  ISO through a Grub2 loopback, instead of the more common DVD or USB
  install media. The system is able to boot successfully with this
  approach, but the installer runs into issues. The first seems to be a
  failure to configure the boot CD for apt updates (there is of course
  no boot CD).

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: ubiquity 2.21.17
  ProcVersionSignature: Ubuntu 3.19.0-10.10-generic 3.19.2
  Uname: Linux 3.19.0-10-generic x86_64
  ApportVersion: 2.16.2-0ubuntu4
  Architecture: amd64
  CasperVersion: 1.356
  Date: Sun Apr  5 12:13:18 2015
  InstallCmdLine: BOOT_IMAGE=(loop)/casper/vmlinuz.efi boot=casper iso-scan/filename=/Downloads/ubuntu-15.04-beta2-desktop-amd64.iso splash toram
  LiveMediaBuild: Ubuntu 15.04 "Vivid Vervet" - Beta amd64 (20150326)
  ProcEnviron:
   LANGUAGE=en_CA.UTF-8
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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