[Bug 1875297] [NEW] Ubuntu minimal install takes longer than normal install when installing from official ISO

[Tony Thuitai]

Public bug reported:

Expected installation: Minimal installation should not take longer than
normal installation.

Performed a test of Ubuntu 19.10 installation with Erase Disk option on
both a 5400rpm hard disk and a SATA 3 SSD when they are connected
directly to a SATA 3 interface and internet speed and mirrors are fast.
When installing on a 5400rpm hard disk, minimal installation takes
almost an hour but normal installation takes about 30 minutes. When
installing on a SATA 3 SSD, minimal installation takes about 10 minutes
while the normal installation takes about 5 minutes.

Why the opposite of the expected installation occurs is because the
Minimal installation mode seems to 'debloat' the normal installation by
removing packages that are not required which include games, media
players and other applications, locales and many of them are not of the
selected language and installer related packages.

I request a fix to the ubiquity installer such that only the required
packages are installed based on language and other options especially
whether Minimal or Normal set before the start of installation on
hardware. This will save a lot of time, especially on mechanical hard
drives.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity (not installed)
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Apr 27 10:14:37 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
InstallationDate: Installed on 2020-04-27 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
SourcePackage: ubiquity
Symptom: installer
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug focal ubiquity-20.04.15

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https://bugs.launchpad.net/bugs/1875297

Title:
  Ubuntu minimal install takes longer than normal install when
  installing from official ISO

Status in ubiquity package in Ubuntu:
  New

Bug description:
  Expected installation: Minimal installation should not take longer
  than normal installation.

  Performed a test of Ubuntu 19.10 installation with Erase Disk option
  on both a 5400rpm hard disk and a SATA 3 SSD when they are connected
  directly to a SATA 3 interface and internet speed and mirrors are
  fast. When installing on a 5400rpm hard disk, minimal installation
  takes almost an hour but normal installation takes about 30 minutes.
  When installing on a SATA 3 SSD, minimal installation takes about 10
  minutes while the normal installation takes about 5 minutes.

  Why the opposite of the expected installation occurs is because the
  Minimal installation mode seems to 'debloat' the normal installation
  by removing packages that are not required which include games, media
  players and other applications, locales and many of them are not of
  the selected language and installer related packages.

  I request a fix to the ubiquity installer such that only the required
  packages are installed based on language and other options especially
  whether Minimal or Normal set before the start of installation on
  hardware. This will save a lot of time, especially on mechanical hard
  drives.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity (not installed)
  ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
  Uname: Linux 5.4.0-26-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Mon Apr 27 10:14:37 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed maybe-ubiquity quiet splash ---
  InstallationDate: Installed on 2020-04-27 (0 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  SourcePackage: ubiquity
  Symptom: installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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