(Need Root)Enable Automatic Light Sensor on Xperia Ray

I've found the way to enable ALS on Ray:

Using root explorer Change this value in hw_config.sh(inside system/etc):
# LMU AS3676 Configuration
dev=/sys/devices/i2c-0/0-0040/leds/
echo 0,0,0,0 > $dev/lcd-backlight/als/params #[gain],[filter_up],[filter_down],[offset]
echo 1 > $dev/lcd-backlight/als/enable #Sensor on/off. 1 = on, reg 90h
echo 12900 > $dev/torch/max_current
To
# LMU AS3676 Configuration
dev=/sys/devices/i2c-0/0-0040/leds/
echo 3,2,2,0 > $dev/lcd-backlight/als/params #[gain],[filter_up],[filter_down],[offset]
echo 1 > $dev/lcd-backlight/als/enable #Sensor on/off. 1 = on, reg 90h
echo 12900 > $dev/torch/max_current

Optional:replace als_curve.ini with the one i provide(is from arc):for me is better.
UPDATE:I've deleted the "als_curve.inf" from phone and changed
echo 3,2,2,0 > $dev/lcd-backlight/als/params #[gain],[filter_up],[filter_down],[offset]
to
echo 1,1,1,0 > $dev/lcd-backlight/als/params #[gain],[filter_up],[filter_down],[offset]

now backlight seem more"wide range".

UPDATE: New CWM version added(InstallazioneALS_Xperia_Ray.zip):flash via recovery.

UPDATE:In official ics 4.0.4 i found the best way is to delete als_curve.inf (after change echo 1,1,1,0 )

UPDATE 08/November: for a fast response (istantaneous dim change) flash (Fast Response)InstallazioneALS_Xperia_Ray.zip

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ATTACHED FILES

	als_curve.zip - (301 Bytes)
	InstallazioneALS_Xperia_Ray.zip -(158.4 KB)
	(Fast Response)InstallazioneALS_Xperia_Ray.zip -(157.5 KB)