[Bug 1703690] Re: Add support for Budgie Desktop using GNOME Screensaver

[Iain Lane]

Sponsored, thanks. For gnome-desktop3, I merged your patch into the
revert patch since I thought it made sense there. If that's too annoying
in future, someone can split it back out.

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https://bugs.launchpad.net/bugs/1703690

Title:
  Add support for Budgie Desktop using GNOME Screensaver

Status in gnome-desktop3 package in Ubuntu:
  Fix Released
Status in gnome-screensaver package in Ubuntu:
  In Progress

Bug description:
  Ubuntu Budgie and Budgie Desktop uses GNOME Screensaver for its lock-
  screen.

  It also uses gnome-control-center to control both the desktop
  background and the lock-screen background.

  GNOME Screensaver does not support gnome-control-center lock screen
  dialog - GNOME has changed to a gsettings path
  org.gnome.desktop.screensaver.  GNOME Screensaver is expecting the
  path org.gnome.desktop.background.

  To resolve this requires patches in two packages - gnome-screensaver
  and gnome-desktop3.

  1. GNOME Screensaver has been patched to support Budgie Desktop and gnome-control-center.
  Note - I've taken the opportunity to reuse the existing "Unity" patchwork which is now defunct (I believe) since Unity uses an alternative locking mechanism.  The lock-screen is styled as per the old "Unity" implementation before Unity 16.04 moved to the new lock screen.

  2. The consequence of making the requisite changes to GNOME
  Screensaver has unfortunately impacted gnome-desktop3.  gnome-desktop3
  has a Ubuntu specific patch to revert a GNOME upstream decision to
  remove a key called draw-background.  GNOME Screensaver calls a public
  function in gnome-desktop3 - the gsettings path causes a segmentation
  fault since draw-background does not exist in
  org.gnome.desktop.screensaver.  I have worked around this to check the
  path being called before pulling the draw-background key.

  All of this is explained in the dep3 headers of the two debdiff
  patches attached

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