--- drivers/misc/sony-laptop.c~	2007-09-07 06:28:48.000000000 +0200
+++ drivers/misc/sony-laptop.c	2007-09-09 20:08:57.000000000 +0200
@@ -589,10 +589,10 @@
 {
 	switch (direction) {
 		case SNC_VALIDATE_OUT:
-			return value - 1;
+			return value;
 		case SNC_VALIDATE_IN:
-			if (value >= 0 && value < SONY_MAX_BRIGHTNESS)
-				return value + 1;
+			if (value >= 0 && value <= SONY_MAX_BRIGHTNESS)
+				return value;
 	}
 	return -EINVAL;
 }
@@ -669,7 +669,7 @@
 static int sony_backlight_update_status(struct backlight_device *bd)
 {
 	return acpi_callsetfunc(sony_nc_acpi_handle, "SBRT",
-				bd->props.brightness + 1, NULL);
+				bd->props.brightness, NULL);
 }
 
 static int sony_backlight_get_brightness(struct backlight_device *bd)
@@ -679,7 +679,7 @@
 	if (acpi_callgetfunc(sony_nc_acpi_handle, "GBRT", &value))
 		return 0;
 	/* brightness levels are 1-based, while backlight ones are 0-based */
-	return value - 1;
+	return value;
 }
 
 static struct backlight_device *sony_backlight_device;
@@ -790,7 +790,7 @@
 			    sony_backlight_get_brightness
 			    (sony_backlight_device);
 			sony_backlight_device->props.max_brightness = 
-			    SONY_MAX_BRIGHTNESS - 1;
+			    SONY_MAX_BRIGHTNESS;
 		}
 
 	}