[Bug 1908969] [NEW] Live installer crashes after failing to download additional packages from "CDROM" drive when installed from USB drive

[Nick]

Public bug reported:

Installing Ubuntu 20.04.1, it fails upon trying to access the CD drive
to download additional packages. But I'm installing from USB stick and
no disc is in the CD drive.

1. I can't get a terminal, I'm in a state where I only have a browser and top panel.
2. ??
3. What I expected: System to continue and finish fresh install of 20.04.1
4. It failed and quit after the CD drive attempt.

This page only lets me add one file so I added syslog, hoping it worked.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15.2
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27.4
Architecture: amd64
CasperMD5CheckMismatches: ./pool/restricted/n/nvidia-graphics-drivers-440/nvidia-utils-440_440.100-0ubuntu0.20.04.1_amd64.deb
CasperMD5CheckResult: skip
CasperVersion: 1.445.1
CurrentDesktop: ubuntu:GNOME
Date: Tue Dec 22 16:21:38 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
LiveMediaBuild: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
ProcEnviron:
 LANGUAGE=en_NZ.UTF-8
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_NZ.UTF-8
 LC_NUMERIC=C.UTF-8
SourcePackage: ubiquity
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug focal ubiquity-20.04.15.2 ubuntu

** Attachment added: "Syslog as requested"
   https://bugs.launchpad.net/bugs/1908969/+attachment/5445716/+files/syslog

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https://bugs.launchpad.net/bugs/1908969

Title:
  Live installer crashes after failing to download additional packages
  from "CDROM" drive when installed from USB drive

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Installing Ubuntu 20.04.1, it fails upon trying to access the CD drive
  to download additional packages. But I'm installing from USB stick and
  no disc is in the CD drive.

  1. I can't get a terminal, I'm in a state where I only have a browser and top panel.
  2. ??
  3. What I expected: System to continue and finish fresh install of 20.04.1
  4. It failed and quit after the CD drive attempt.

  This page only lets me add one file so I added syslog, hoping it
  worked.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.15.2
  ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
  Uname: Linux 5.4.0-42-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27.4
  Architecture: amd64
  CasperMD5CheckMismatches: ./pool/restricted/n/nvidia-graphics-drivers-440/nvidia-utils-440_440.100-0ubuntu0.20.04.1_amd64.deb
  CasperMD5CheckResult: skip
  CasperVersion: 1.445.1
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Dec 22 16:21:38 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
  ProcEnviron:
   LANGUAGE=en_NZ.UTF-8
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_NZ.UTF-8
   LC_NUMERIC=C.UTF-8
  SourcePackage: ubiquity
  UpgradeStatus: No upgrade log present (probably fresh install)

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