[Bug 1941620] Re: System still install update packages even uncheck "Download updates..." during install OS

[Robert Ross]

I am able to reproduce this on a 22.04 ISO that is custom build to
include linux-oem-22.04 kernel

When a new update comes out, the old image will fail to install. 
I

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Title:
  System still install update packages even uncheck "Download
  updates..." during install OS

Status in ubiquity package in Ubuntu:
  Confirmed

Bug description:
  Steps to repro:
  1. Connect to the internet and install ubuntu-20.04.2.0-desktop-amd64.iso.
  2. In the "Updates and other software" page, select "Normal installation", uncheck "Download updates while..." and "Install third-party...".
  3. While the system shows "Installation Complete", remove the LAN cable.
  4. Reboot system then login, execute "dpkg --list".

  Expected results:
  The system did not install any update packages.

  Actual results:
  The system installed update packages.

  Please review the attachment.
  While connecting to the internet during installation, the system installed linux-image-5.11.0-27-generic and other update packages.
  If we don't connect to the internet during installation, the linux-image is 5.8.0-43.

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