diff --git a/arch/sim/Kconfig b/arch/sim/Kconfig
index 445af0a9d0b..535cf1d63af 100644
--- a/arch/sim/Kconfig
+++ b/arch/sim/Kconfig
@@ -519,6 +519,13 @@ endchoice
 endif # SIM_X11FB
 
 if INPUT
+config SIM_X11EVENT_INTERVAL
+	int "X11 event interval in ms"
+	default 8
+	depends on SIM_X11FB
+	---help---
+		 X11 event sleep time
+
 choice
 	prompt "Input Device"
 	default SIM_NOINPUT
diff --git a/arch/sim/src/sim/sim_ajoystick.c b/arch/sim/src/sim/sim_ajoystick.c
index 235824541f0..5cecc3e45e3 100644
--- a/arch/sim/src/sim/sim_ajoystick.c
+++ b/arch/sim/src/sim/sim_ajoystick.c
@@ -41,8 +41,8 @@
  * Pre-processor Definitions
  ****************************************************************************/
 
-#  define AJOY_SUPPORTED (AJOY_BUTTON_1_BIT | AJOY_BUTTON_2_BIT | \
-                         AJOY_BUTTON_3_BIT)
+#define AJOY_SUPPORTED (AJOY_BUTTON_1_BIT | AJOY_BUTTON_2_BIT | \
+                       AJOY_BUTTON_3_BIT)
 
 /****************************************************************************
  * Private Function Prototypes
diff --git a/arch/sim/src/sim/sim_initialize.c b/arch/sim/src/sim/sim_initialize.c
index 04f02bf2f96..43d72d4dd44 100644
--- a/arch/sim/src/sim/sim_initialize.c
+++ b/arch/sim/src/sim/sim_initialize.c
@@ -39,6 +39,21 @@
 #include "sim_internal.h"
 #include "sim_hostusrsock.h"
 
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define SIM_X11EVENT_PERIOD    MSEC2TICK(CONFIG_SIM_X11EVENT_INTERVAL)
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+#if defined(CONFIG_SIM_TOUCHSCREEN) || defined(CONFIG_SIM_AJOYSTICK) || \
+    defined(CONFIG_SIM_BUTTONS)
+static struct wdog_s g_x11event_wdog;   /* Watchdog for event loop */
+#endif
+
 /****************************************************************************
  * Private Functions
  ****************************************************************************/
@@ -59,6 +74,24 @@ static void sim_init_cmdline(void)
 }
 #endif
 
+/****************************************************************************
+ * Name: sim_x11event_interrupt
+ *
+ * Description:
+ *   interrupts event process function
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_SIM_TOUCHSCREEN) || defined(CONFIG_SIM_AJOYSTICK) || \
+    defined(CONFIG_SIM_BUTTONS)
+static void sim_x11event_interrupt(wdparm_t arg)
+{
+  sim_x11events();
+  wd_start_next((FAR struct wdog_s *)arg, SIM_X11EVENT_PERIOD,
+                sim_x11event_interrupt, arg);
+}
+#endif
+
 /****************************************************************************
  * Name: sim_init_smartfs
  *
@@ -169,13 +202,6 @@ static int sim_loop_task(int argc, char **argv)
 
       sched_lock();
 
-#if defined(CONFIG_SIM_TOUCHSCREEN) || defined(CONFIG_SIM_AJOYSTICK) || \
-    defined(CONFIG_SIM_BUTTONS)
-      /* Drive the X11 event loop */
-
-      sim_x11events();
-#endif
-
 #if defined(CONFIG_SIM_LCDDRIVER) || defined(CONFIG_SIM_FRAMEBUFFER)
       sim_x11loop();
 #endif
@@ -323,6 +349,12 @@ void up_initialize(void)
   sim_encoder_initialize();
 #endif
 
+#if defined(CONFIG_SIM_TOUCHSCREEN) || defined(CONFIG_SIM_AJOYSTICK) || \
+    defined(CONFIG_SIM_BUTTONS)
+  wd_start(&g_x11event_wdog, 0, sim_x11event_interrupt,
+           (wdparm_t)&g_x11event_wdog);
+#endif
+
   kthread_create("loop_task", CONFIG_SIM_LOOPTASK_PRIORITY,
                  CONFIG_DEFAULT_TASK_STACKSIZE,
                  sim_loop_task, NULL);