diff -upr mate-control-center/font-viewer/font-model.c mate-control-center-test/font-viewer/font-model.c

--- mate-control-center/font-viewer/font-model.c	2015-08-30 18:12:13.361377394 +0200

+++ mate-control-center-test/font-viewer/font-model.c	2015-08-30 18:06:16.890653000 +0200

@@ -209,10 +209,11 @@ create_thumbnail (ThumbInfoData *thumb_i

   return pixbuf;

 }

-static gboolean

-ensure_thumbnails_job (GIOSchedulerJob *job,

-                       GCancellable *cancellable,

-                       gpointer user_data)

+static void

+ensure_thumbnails_job (GTask *task,

+                       gpointer source_object,

+                       gpointer user_data,

+                       GCancellable *cancellable)

 {

     GList *thumb_infos = user_data, *l;

@@ -279,8 +280,6 @@ ensure_thumbnails_job (GIOSchedulerJob *

     }

     g_list_free (thumb_infos);

-

-    return FALSE;

 }

 typedef struct {

@@ -318,6 +317,7 @@ font_infos_loaded (gpointer user_data)

 {

     LoadFontInfosData *data = user_data;

     FontViewModel *self = data->self;

+    GTask *task = NULL;

     GList *l, *thumb_infos = NULL;

     for (l = data->font_infos; l != NULL; l = l->next) {

@@ -345,9 +345,12 @@ font_infos_loaded (gpointer user_data)

     g_signal_emit (self, signals[CONFIG_CHANGED], 0);

-    g_io_scheduler_push_job (ensure_thumbnails_job,

-                             thumb_infos, NULL,

-                             G_PRIORITY_DEFAULT, NULL);

+    task = g_task_new (NULL, NULL, NULL, NULL);

+

+    g_task_set_task_data (task, thumb_infos, NULL);

+

+    g_task_run_in_thread (task, ensure_thumbnails_job);

+    g_object_unref (task);

     return FALSE;

 }