[Bug 2150568] Re: No Livepatch icon is shown on Resolute

[Launchpad Bug Tracker]

** Merge proposal linked:
   https://code.launchpad.net/~rastersoft-gmail/ubuntu/+source/update-notifier/+git/update-notifier-1/+merge/505165

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https://bugs.launchpad.net/bugs/2150568

Title:
  No Livepatch icon is shown on Resolute

Status in update-notifier package in Ubuntu:
  Fix Committed
Status in update-notifier source package in Resolute:
  In Progress

Bug description:
  [Impact]

  Update Notifier requires to have installed either "software-
  properties-gtk" or "software-properties-qt" deb package to show the
  Livepatch icon in the top bar, because it is the program used to
  manage Ubuntu Pro. But from Resolute onward this is no longer the
  case, since "Security Center" snap is used instead. So in new
  installs, the icon is not being shown because neither "software-
  properties-gtk" nor "software-properties-qt" are installed by default.

  The solution is to add support for the new "Security Center" snap.

  [Test plan]

  * Ensure that "software-properties-common" .deb package is uninstalled
  (which will also remove "software-properties-gtk" and "software-
  properties-qt" if are installed too), and also remove the "desktop-
  security-center" snap.

  * Kill any instance of "update-notifier" in the system.

  * Ensure that you have enabled either the "AppIndicator and
  KStatusNotifierItem" or the "ubuntu-appindicator" Gnome Shell
  extensions.

  * From a terminal, launch "update-notifier". After waiting about ten
  seconds, no icon should appear in the top bar, and in the command line
  the message "Could not find Livepatch settings UI application" and/or
  "There is no graphical application installed to manage Livepatch. The
  livepatch status icon will not be displayed." does appear.

  * Kill "update-notifier"

  * Install "software-properties-gtk" using APT

  * Run again "update-notifier". After waiting about five seconds, the
  "livepatch" icon must appear in the Gnome top bar.

  * Clicking on the "livepatch" icon and choosing "Livepatch Settings"
  must open "Software & Updates" in the "Ubuntu pro" tab.

  * kill "update-notifier"

  * Install "desktop-security-center" using SNAP

  * Run again "update-notifier". After waiting about five seconds, the
  "livepatch" icon must appear in the Gnome top bar.

  * Clicking on the "livepatch" icon and choosing "Livepatch Settings"
  must open "Security center" in the "Ubuntu pro" tab.

  * Kill "update-notifier"

  * Uninstall "software-properties-common" using APT

  * Run again "update-notifier". After waiting about five seconds, the
  "livepatch" icon must appear in the Gnome top bar.

  * Clicking on the "livepatch" icon and choosing "Livepatch Settings"
  must open "Security center" in the "Ubuntu pro" tab.

  [ Where problems could occur ]

  * The new code could fail to detect any of the programs. In that case,
  no "livepatch" icon would be shown in the Gnome top bar.

  * The new code could crash "update-notifier". In that case, no
  "livepatch" icon would be shown in the Gnome top bar.

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