The child of a video bus device is not alway a video device.
It should be a warn message rather than an exception here.
http://bugzilla.kernel.org/show_bug.cgi?id=9761
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
 
                status = acpi_video_bus_get_one_device(dev, video);
                if (ACPI_FAILURE(status)) {
-                       ACPI_EXCEPTION((AE_INFO, status, "Cant attach device"));
+                       ACPI_DEBUG_PRINT((ACPI_DB_WARN,
+                                       "Cant attach device"));
                        continue;
                }
        }