File mutter-SLE-bell.patch of Package mutter

diff --unified --recursive --text --new-file --color mutter-40.0.old/data/org.gnome.mutter.gschema.xml.in mutter-40.0.new/data/org.gnome.mutter.gschema.xml.in
--- mutter-40.0.old/data/org.gnome.mutter.gschema.xml.in	2021-04-23 08:52:33.870911873 +0800
+++ mutter-40.0.new/data/org.gnome.mutter.gschema.xml.in	2021-04-23 08:53:11.404056017 +0800
@@ -156,6 +156,16 @@
       </description>
     </key>
 
+    <key name="audible-bell-force-through-server" type="b">
+      <default>false</default>
+      <summary>Force the System Bell through the X server only.</summary>
+      <description>
+        Force the System Bell through the X server only for systems that
+        do not want to go through the sound card - for example that don't
+        have speakers.
+      </description>
+    </key>
+
     <child name="keybindings" schema="org.gnome.mutter.keybindings"/>
 
   </schema>
diff --unified --recursive --text --new-file --color mutter-40.0.old/src/core/bell.c mutter-40.0.new/src/core/bell.c
--- mutter-40.0.old/src/core/bell.c	2021-04-23 08:52:33.877578506 +0800
+++ mutter-40.0.new/src/core/bell.c	2021-04-23 08:53:11.404056017 +0800
@@ -54,6 +54,11 @@
 #include "core/window-private.h"
 #include "meta/compositor.h"
 
+#include "meta/display.h"
+#include "meta/meta-x11-display.h"
+#include <X11/Xlib.h>
+#include <X11/XKBlib.h>
+
 G_DEFINE_TYPE (MetaBell, meta_bell, G_TYPE_OBJECT)
 
 enum
@@ -202,6 +207,14 @@
   if (meta_prefs_get_visual_bell ())
     bell_visual_notify (display, window);
 
+  if (meta_prefs_bell_force_through_server ())
+   {
+    MetaX11Display *x11_display = meta_display_get_x11_display (display);
+    Display *xdisplay = meta_x11_display_get_xdisplay (x11_display);
+    XkbForceBell (xdisplay, 100);
+    return TRUE;
+    }
+
   if (meta_prefs_bell_is_audible ())
     return bell_audible_notify (display, window);
 
diff --unified --recursive --text --new-file --color mutter-40.0.old/src/core/prefs.c mutter-40.0.new/src/core/prefs.c
--- mutter-40.0.old/src/core/prefs.c	2021-04-23 08:52:33.877578506 +0800
+++ mutter-40.0.new/src/core/prefs.c	2021-04-23 08:53:11.404056017 +0800
@@ -98,6 +98,7 @@
 static gboolean focus_change_on_pointer_rest = FALSE;
 static gboolean bell_is_visible = FALSE;
 static gboolean bell_is_audible = TRUE;
+static gboolean bell_force_through_server = FALSE;
 static gboolean gnome_accessibility = FALSE;
 static gboolean gnome_animations = TRUE;
 static gboolean locate_pointer_is_enabled = FALSE;
@@ -352,6 +353,13 @@
       &bell_is_audible, /* FIXME: change the name: it's confusing */
     },
     {
+      { "audible-bell-force-through-server",
+        SCHEMA_MUTTER,
+        META_PREF_AUDIBLE_BELL_FORCE_THROUGH_SERVER,
+      },
+      &bell_force_through_server,
+    },
+    {
       { KEY_GNOME_ACCESSIBILITY,
         SCHEMA_INTERFACE,
         META_PREF_GNOME_ACCESSIBILITY,
@@ -1714,6 +1722,9 @@
     case META_PREF_AUDIBLE_BELL:
       return "AUDIBLE_BELL";
 
+    case META_PREF_AUDIBLE_BELL_FORCE_THROUGH_SERVER:
+      return "AUDIBLE_BELL_FORCE_THROUGH_SERVER";
+
     case META_PREF_VISUAL_BELL_TYPE:
       return "VISUAL_BELL_TYPE";
 
@@ -1992,6 +2003,12 @@
   return bell_is_audible;
 }
 
+gboolean
+meta_prefs_bell_force_through_server (void)
+{
+  return bell_force_through_server;
+}
+
 GDesktopVisualBellType
 meta_prefs_get_visual_bell_type (void)
 {
diff --unified --recursive --text --new-file --color mutter-40.0.old/src/meta/prefs.h mutter-40.0.new/src/meta/prefs.h
--- mutter-40.0.old/src/meta/prefs.h	2021-04-23 08:52:33.877578506 +0800
+++ mutter-40.0.new/src/meta/prefs.h	2021-04-23 08:53:11.404056017 +0800
@@ -91,6 +91,7 @@
   META_PREF_WORKSPACE_NAMES,
   META_PREF_VISUAL_BELL,
   META_PREF_AUDIBLE_BELL,
+  META_PREF_AUDIBLE_BELL_FORCE_THROUGH_SERVER,
   META_PREF_VISUAL_BELL_TYPE,
   META_PREF_GNOME_ACCESSIBILITY,
   META_PREF_GNOME_ANIMATIONS,
@@ -480,6 +481,9 @@
 gboolean           meta_prefs_bell_is_audible      (void);
 
 META_EXPORT
+gboolean           meta_prefs_bell_force_through_server (void);
+
+META_EXPORT
 GDesktopVisualBellType meta_prefs_get_visual_bell_type (void);
 
 META_EXPORT