4/8/2023 0 Comments Linux brightness control![]() ![]() ![]() The following is an example implementation in Python 3. The benefits of using it are that no modification to device files is required and it is vendor agnostic. You can control your computer keyboard backlight via the D-Bus interface. The first parameter led turns on the led, and -led turns it off, the NUMBER parameters accepts integers for 1 to 32 (each number corresponds to a led in you system, keyboards seem to generally be number 3), or 'on' and 'off' (on will turn ALL lights on, and off will turn ALL lights off). Some keyboard manufactores are not recognized by brightnessctl or light, but you can use xorg-xset to control its lights if you are running Xorg. $ brightnessctl -device='tpacpi::kbd_backlight' set 1 This will show the absolute and relative current value and the maximum absolute value. $ brightnessctl -device='tpacpi::kbd_backlight' info When using brightnessctl you can get a list of available brightness controls with brightnessctl -list, then to show the kbd backlight information: ![]() # echo 1 > /sys/class/leds/tpacpi::kbd_backlight/brightness $ cat /sys/class/leds/tpacpi::kbd_backlight/max_brightness For example to get the maximum brightness level: The current brightness level can be get by reading /sys/class/leds/tpacpi::kbd_backlight/brightness. The sys pseudo-file system exposes an interface to the keyboard backlight. There are a variety ways to manage the brightness level and different helpers tools to accomplish this, such as brightnessctl or light. There are various methods to control the keyboard backlight brightness level. ![]()
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