diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c
index 05dff63..3b063a6 100644
--- a/drivers/acpi/video.c
+++ b/drivers/acpi/video.c
@@ -1979,6 +1979,10 @@
 	unsigned long long level_current, level_next;
 	int result = -EINVAL;
 
+	/* no warning message if acpi_backlight=vendor is used */
+	if (!acpi_video_backlight_support())
+		return 0;
+
 	if (!device->brightness)
 		goto out;