diff -up ./dbus/dbus-connection-internal.h.to5 ./dbus/dbus-connection-internal.h
--- ./dbus/dbus-connection-internal.h.to5	2018-06-01 21:26:02.000000000 +0900
+++ ./dbus/dbus-connection-internal.h	2018-06-01 21:26:56.000000000 +0900
@@ -41,8 +41,8 @@ typedef enum
   DBUS_ITERATION_BLOCK      = 1 << 2  /**< Block if nothing to do. */
 } DBusIterationFlags;
 
-/** default timeout value when waiting for a message reply, 25 seconds */
-#define _DBUS_DEFAULT_TIMEOUT_VALUE (25 * 1000)
+/** default timeout value when waiting for a message reply, 50 seconds for slow machines */
+#define _DBUS_DEFAULT_TIMEOUT_VALUE (50 * 1000)
 
 typedef void (* DBusPendingFdsChangeFunction) (void *data);