
To adjust the threshold of environment luminosity, edit the keyboard-backlight.py and set the value of threshold variable. The lights should turn on when the environment goes dark and turn off when the environment has enough light, automatically. mount -o rw,remount /ĥ) Copy the files to their destinations cp -v ~/Downloads/nf /etc/init cp -v ~/Downloads/keyboard-backlight.py /usr/local/binĦ) That's it! Restart the computer and the script should work.
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The file usually goes to Downloads folder.Ģ) Download this file and name it nf. The file usually goes to Downloads folde.ģ) Open a crosh terminal (CTRL+ALT+T), type shell and ENTER.Ĥ) Make the root directory writable. If anyone wants to do the same, please follow the steps below.ġ) Download this file and name it keyboard-backlight.py. I'm attempting to use upstart to create a job like I have suggested before, and I could accomplished a good result. With this information one can make a script that, periodically, checks the environment and automatically decide if the backlight must be turned on or not.

cat /sys/devices/platform/applesmc.768/light The command bellow returns a tuple, where the first term varies from 0 to 255 according to environment luminosity. It's even possible to adjust the brightness according to the environment luminosity. With these informations, it is pretty easy to create python or shell scripts to increase or decrease the keyboard brightness.
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To check the current brightness, you can type this command (no password is required): cat /sys/devices/platform/applesmc.768/leds/smc\:\:kbd_backlight/brightness Replacing 64 to any valud from 0 to 255 (0 turns off and 255 has maximum brightness).

Run the followed command: sudo sh -c 'echo 64 > /sys/devices/platform/applesmc.768/leds/smc\:\:kbd_backlight/brightness' So you can run the followed command into the shell (CTRL+ALT+T to open the Crosh - Chrome OS Developer Shell, type shell and press enter to enter into the shell environment - you can see the prompt / $ As a workaround, anyone can set the keyboard brightness in cloudready setting a value between 1 and 255 to this file (0 turns the lights off): /sys/devices/platform/applesmc.768/leds/smc\:\:kbd_backlight/brightnessįor me the value 64 is pretty enough.
