[Bug 1902025] Re: hwe kernel not scoped under "Ubuntu Base"

[William Wilson]

The verification passed for focal.

This image shows the initial bug, installation of the proposed package,
and the bug fixed afterwards. In addition to showing that the hwe
packages are scoped under Ubuntu Base, it also shows the following other
kernel packages being re-scoped under Ubuntu base:

Header files related to Linux kernel version 5.8.0
Linux kernel extra modules for version 5.8.0 on 64 bit x86 SMP
Linux kernel headers for version 5.8.0 on 64 bit x86 SMP
Signed kernel image generic

The non kernel related packages from the "Other updates" section such as
PAM modules and language packs for Thunderbird are not re-scoped under
Ubuntu Base, as expected

** Attachment added: "lp1902025_focal.png"
   https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1902025/+attachment/5453548/+files/lp1902025_focal.png

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https://bugs.launchpad.net/bugs/1902025

Title:
  hwe kernel not scoped under "Ubuntu Base"

Status in update-manager package in Ubuntu:
  Fix Released
Status in update-manager source package in Focal:
  Fix Committed
Status in update-manager source package in Groovy:
  Fix Committed
Status in update-manager source package in Hirsute:
  Fix Released

Bug description:
  linux-image-generic-hwe-20.04
  linux-headers-generic-hwe-20.04
  linux-generic-hwe-20.04

  Are all listed as standalone updates in update manager, instead they
  should be grouped under Ubuntu Base.

  [Impact]

   * When running update-manager, hwe kernel packages and some other
     kernel packages were not appearing under Ubuntu Base as they should

   * This was causing the section "Other Updates" to appear cluttered

   * Backporting to stable releases because of the visual impact to
  users

  [Test Case]

   * If no updates for kernel related packages are available, downgrade some 
     kernel related packages such as the hwe packages listed in this bug
     report

   * Run update-manager and observe that the kernel packages are not
     grouped under Ubuntu Base

  [Where problems could occur]

   * Packages that don't belong under Ubuntu Base could be grouped under 
     Ubuntu Base if the new regex is too generic.

   * Packages that do belong under Ubuntu Base could be missed if the regex
     does not account for them

  [Other info]

   * In the future it would be best if new packages do not begin with the
     string "linux-" unless they are related to the kernel. This will
     prevent these packages from being accidentally grouped under
     Ubuntu Base

   * Currently there are a few "linux-*" packages that do not belong under
     Ubuntu Base, such as linux-show-player and linux-sound-base.

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