File gnome-shell-screen-disappear.patch of Package gnome-shell.openSUSE_Leap_42.3_Update

Index: gnome-shell-3.20.1/js/gdm/authPrompt.js
===================================================================
--- gnome-shell-3.20.1.orig/js/gdm/authPrompt.js
+++ gnome-shell-3.20.1/js/gdm/authPrompt.js
@@ -456,8 +456,10 @@ const AuthPrompt = new Lang.Class({
         this.setUser(null);
         this.stopSpinning();
 
-        if (oldStatus == AuthPromptStatus.VERIFICATION_FAILED)
+        if (oldStatus == AuthPromptStatus.VERIFICATION_FAILED) {
+            this._userVerifier.cancel();
             this.emit('failed');
+        }
 
         let beginRequestType;
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