** Description changed:

+ [Impact]
+ 
+  * Shutdown and restart options don't work from the login screen, when
+ the user is not logged in.
+ 
+ [Test Case]
+ 
+  * Start the system and don't log in, or log out in case the system is set up 
with autologin.
+  * Restart, then shut down the system using the option in the upper right 
corner of the login screen.
+  * Observe both operations working.
+ 
+ [Regression Potential]
+ 
+  * The fix is treating treating the greeter as user display sessions by
+ cherry-picking upstream's change released in v243. The fix itself is
+ very small, but there may be non-obvious security implications.
+ 
+ [Original Bug Text]
+ 
  When selecting the shutdown icon from the log-in screen you are prompted
  with a dialog that allows you to either cancel, restart or shutdown.
  
  It has been noted that the restart and shutdown options no longer work.
  
  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: gnome-shell 3.34.1-1ubuntu1
  ProcVersionSignature: Ubuntu 5.3.0-18.19-generic 5.3.1
  Uname: Linux 5.3.0-18-generic x86_64
  ApportVersion: 2.20.11-0ubuntu8
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Sun Oct 13 09:08:23 2019
  DisplayManager: gdm3
  InstallationDate: Installed on 2019-05-17 (148 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190517)
  RelatedPackageVersions: mutter-common 3.34.1-1ubuntu1
  SourcePackage: gnome-shell
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1847896

Title:
  Unable to shutdown or restart from log-in screen

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