--- linux-2.6.23.1.orig/drivers/acpi/video.c	2007-10-12 18:43:44.000000000 +0200
+++ linux-2.6.23.1/drivers/acpi/video.c	2007-11-22 23:03:03.000000000 +0100
@@ -412,11 +412,23 @@
 	int status;
 	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
 	struct acpi_object_list args = { 1, &arg0 };
+	int i, best_level = 100, best_match = 100;
 
+	for (i = 0; i < device->brightness->count; i++) {
+		int diff = abs(device->brightness->levels[i] - level);
+		if (diff == 0) {
+		    best_level = level;
+		    break;
+		} else if(diff < best_match) {
+		    best_level = device->brightness->levels[i];
+		    best_match = diff;
+		}
+	}
 
-	arg0.integer.value = level;
+	arg0.integer.value = best_level;
 	status = acpi_evaluate_object(device->dev->handle, "_BCM", &args, NULL);
 
+
 	return status;
 }