This script controll keyboard backlight on IBM ThinkPad X-series

ThinkLight

#!/bin/bash

# Vadim Zaliva lord@crocodile.org
# based on https://gist.github.com/hadess/6847281

if [[ $EUID -ne 0 ]]; then
   echo "This script must be run as root" 1>&2
   exit 1
fi


usage() {
   echo "This script controll keyboard backlight on IBM ThinkPad X-series"
   echo "Usage: ThinkLight [0|1|2]"
   echo "   0 - off"
   echo "   1 - medium"
   echo "   2 - full"
}

if [ "$#" -ne 1 ];then
   usage
   exit 1
fi

case "$1" in
        0)
            b="\x03"
            ;;
        1)
            b="\x43"
            ;;
        2)
            b="\x83"
            ;;
        *)
            usage
            exit 1
esac


sudo modprobe -r ec_sys
sudo modprobe ec_sys write_support=1

echo -n -e "$b" | sudo dd of="/sys/kernel/debug/ec/ec0/io" bs=1 seek=13 count=1 conv=notrunc 2> /dev/null

Also works on Lenovo ThinkPad X1 Carbon. 👍

Thanks so much for your script - it also works on W541!

Works on T450s 👍

working on x250. thanks!

works on P50S, thanks

works on t460p. thank you!

Works on a X1 Yoga.

Works on s540! Thanks!

Works with Kubuntu 14.04 on my T430s - many thanks! :) Can't find anywhere that tells you how to get the Thinklight (the light that sits over the top of the screen, not under the keyboard), though :(

Dope!

Works on T470s, thanks

Getting this error on t440.

ThinkLight.sh: 6: ThinkLight.sh: [[: not found

excelent ! thank you!

Sorry I am new to linux. How do I run this script ?

@razvan9921 copy and paste into .sh, then chmod +x .sh, then sudo ./.sh 0|1|2

Works on P52. Thank you!

Works perfectly with ubuntu 18.04 on t480s! Thank you!

Thanks for the many insights!
Kinda works on my Ideapad Flex 5i (14iil05)
address is 0xc2 (194 dec) and values are 0x00, 0x01 and 0x02 for off, low, hi, respectively.
echo -n -e 1 | sudo dd of="/sys/kernel/debug/ec/ec0/io" bs=1 seek=194 count=1 conv=notrunc
also, address 0xcc (204 dec) seems to report the current state of the kb backlit (0x50 = off; 0x70 = on) but writing to it does nothing =|
is there an address for the backlight timeout?

Doesn't seem to work on Lenovo E480

@omamkaz Sorry I do not have this model to test and help. For what it's worth it does not work on my Carbon X1 either.
But you can use Fn+SPACE keyboard sequence.

Fn+SPACE also Not work!, Thanks for your response

@vzaliva are you know where I can find some solution for this problem

@omamkaz sorry, I do not know. I think Fn+SPACE was supported in firmware. Try to boot windows and see if it works there. Perhaps you have a hardware problem.

@omamkaz sorry, I do not know. I think Fn+SPACE was supported in firmware. Try to boot windows and see if it works there. Perhaps you have a hardware problem.

Ok, Thanks

Thanks for the many insights!
Kinda works on my ThinkBook 14 G2 ITL (20VD00CNRA)
address is 3 dec and values are 0x1c, 0x1d and 0x1e for off, low, hi, respectively.
echo -n -e "\x1c" | sudo dd of="/sys/kernel/debug/ec/ec0/io" bs=1 seek=3 count=1 conv=notrunc

Thanks for the many insights! Kinda works on my ThinkBook 14 G2 ITL (20VD00CNRA) address is 3 dec and values are 0x1c, 0x1d and 0x1e for off, low, hi, respectively. echo -n -e "\x1c" | sudo dd of="/sys/kernel/debug/ec/ec0/io" bs=1 seek=3 count=1 conv=notrunc

How do you determine if your addresses and values are different and what they actually are?