(Need Root)Enable Automatic Light Sensor on Xperia Ray

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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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where to find hw_config.sh in my system folder?

i found it, but...how to test?

Originally Posted by memazy

where to find hw_config.sh in my system folder?

i found it, but...how to test?

You'll see the screen became more brigth when the ambient light rise,and viceversa..

Originally Posted by memazy

where to find hw_config.sh in my system folder?

i found it, but...how to test?

Both of the files, hw_config.sh and als_curve.conf, are in /system/etc.

Sent from my ST18i using Tapatalk

Originally Posted by arcatarc

[LEFT]I've found the way to enable ALS on Ray.

works! thanks.

Auto-bright stay more sensitive than before.

note: if you replace original als_curve.conf don't forget to set right permissions! rw-r-r. See it at original file before replacing.

Not working for me. Changed it to 3,2,2,0, rebooted and yet no avail.

Edit: !! One can check that light sensor is working fine through service menu (call *#*#7378423#*#*) -> Service tests -> Ambient light sensor. It shows the sensor output and one can play covering the sensor to see as value changes. So, the Ray has a working sensor after all, but it is not used?

Originally Posted by zstoichev

So, the Ray has a working sensor after all, but it is not used?

sensor works. auto-brightness works. but slightly. you can take a torch and to light on a sensor, having covered the screen with a hand. screen will change brightness.

yeah, I saw it "working"... with a step or two at most. I am really disappointed by how SE implemented this. Even the brightness manual slider seams to have 15-16 steps, i.e. it's not smooth. I had a HTC Hero and auto-brightness/slider were flawless.

It works. Good job~

good job thanks!!!