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Basically I'd like to disable the keyboard backlight which at the moment is always on, on my Sony Vaio S15 (2012 series).

I've read a few responses in the past which want me to look for the following file: /sys/devices/platform/sony-laptop/kbd_backlight, however in my case this file just doesn't exist. Please tell me how do I go about it.

Thanks a ton in advance!

EDIT: I found a site listing the solution although I don't really understand what to do (Being a linux newbie :c )

EDIT2: Just tried the above solution, though it doesn't seem to work. PLEASE HELP!

BUMP. Please reply guys. It has already been a week now.

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up vote 2 down vote accepted

The solution in Keyboard backlighting not working on a Vaio laptop seems to work for me. To disable:

sudo rmmod -v sony-laptop; sudo modprobe -v sony-laptop kbd_backlight=0

Permanent solution:

echo "options sony-laptop kbd_backlight=0" | sudo tee /etc/modprobe.d/sony-laptop.conf

I was able to make it work in an appropriate way using:

sudo rmmod -v sony-laptop; sudo modprobe -v sony-laptop kbd_backlight=1 kbd_backlight_timeout=1

Or permanently:

echo "options sony-laptop kbd_backlight=1 kbd_backlight_timeout=1" | sudo tee /etc/modprobe.d/sony-laptop.conf
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