diff --git a/core/includes/config.inc b/core/includes/config.inc
index 3e22534..8ef5ee5 100644
--- a/core/includes/config.inc
+++ b/core/includes/config.inc
@@ -24,34 +24,53 @@
  *   The name of the module or theme to install default configuration for.
  */
 function config_install_default_config($type, $name) {
-  $config_dir = drupal_get_path($type, $name) . '/config';
-  if (is_dir($config_dir)) {
-    $source_storage = new FileStorage($config_dir);
-    $target_storage = drupal_container()->get('config.storage');
+  if ($type == 'module') {
+    $list = module_list();
+  }
+  else {
+    $list = array_keys(list_themes());
+  }
+  $config_changes = array('delete' => array(), 'change' => array());
+  $target_storage = drupal_container()->get('config.storage');
 
-    // If this module defines any ConfigEntity types, then create a manifest file
-    // for each of them with a listing of the objects it maintains.
-    foreach (config_get_module_config_entities($name) as $entity_type => $entity_info) {
-      $manifest_config = config('manifest.' . $entity_info['config_prefix']);
-      $manifest_data = array();
-      foreach ($source_storage->listAll($entity_info['config_prefix']) as $config_name) {
-        list(, , $id) = explode('.', $config_name);
-        $manifest_data[$id]['name'] = $config_name;
-      }
-      $manifest_config->setData($manifest_data)->save();
-    }
+  // Determine config entity types implemented by the installed extension.
+  $config_entity_types = config_get_module_config_entities($name);
 
-    $config_changes = array(
-      'delete' => array(),
-      'create' => array(),
-      'change' => array(),
-    );
-    $config_changes['create'] = $source_storage->listAll();
+  foreach ($list as $extension) {
+    if (!is_dir($config_dir = drupal_get_path($type, $extension) . '/config')) {
+      continue;
+    }
+    $source_storage = new FileStorage($config_dir);
+    $config_changes['create'] = array();
+    // Other extensions may only provide default configuration for configuration
+    // entities. Static extension settings must not be overridden.
+    foreach ($config_entity_types as $entity_type => $entity_info) {
+      $config_changes['create'] = $source_storage->listAll($entity_info['config_prefix'] . '.');
+    }
+    // For the extension being installed, list all configuration objects, and
+    // ensure that a default configuration of the extension takes precedence (in
+    // case an identical name appears in another extension).
+    if ($extension == $name) {
+      $config_changes['create'] = array_merge($config_changes['create'], $source_storage->listAll($extension . '.'));
+    }
     if (empty($config_changes['create'])) {
-      return;
+      continue;
     }
     $remaining_changes = config_import_invoke_owner($config_changes, $source_storage, $target_storage);
-    config_sync_changes($remaining_changes, $source_storage, $target_storage);
+    if ($extension == $name) {
+      config_sync_changes($remaining_changes, $source_storage, $target_storage);
+    }
+  }
+  // If this module defines any ConfigEntity types, then create a manifest file
+  // for each of them with a listing of the objects it maintains.
+  foreach (config_get_module_config_entities($name) as $entity_type => $entity_info) {
+    $manifest_config = config('manifest.' . $entity_info['config_prefix']);
+    $id_index = count(explode('.', $entity_info['config_prefix']));
+    foreach ($target_storage->listAll($entity_info['config_prefix'] . '.') as $config_name) {
+      $parts = explode('.', $config_name);
+      $manifest_config->set($parts[$id_index] . '.name', $config_name);
+    }
+    $manifest_config->save();
   }
 }