There exists the _INI object under the scope of Dock. When 
dock device is hot plugged, the _INI object is executed.
---
 drivers/acpi/dock.c |    7 +++++++
 1 file changed, 7 insertions(+)

Index: linux-2.6/drivers/acpi/dock.c
===================================================================
--- linux-2.6.orig/drivers/acpi/dock.c
+++ linux-2.6/drivers/acpi/dock.c
@@ -603,6 +603,7 @@ static void dock_notify(acpi_handle hand
 	switch (event) {
 	case ACPI_NOTIFY_BUS_CHECK:
 		if (!dock_in_progress(ds) && dock_present(ds)) {
+			acpi_status status;
 			begin_dock(ds);
 			dock(ds);
 			if (!dock_present(ds)) {
@@ -611,6 +612,12 @@ static void dock_notify(acpi_handle hand
 			}
 			atomic_notifier_call_chain(&dock_notifier_list,
 						   event, NULL);
+
+			status = acpi_evaluate_object(ds->handle, "_INI",
+				NULL, NULL);
+			if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
+				printk(KERN_ERR PREFIX
+						"Failure in _INI Object\n");
 			hotplug_dock_devices(ds, event);
 			complete_dock(ds);
 			dock_event(ds, event, DOCK_EVENT);