backlight

Simple (keyboard) back light manipulation for Linux.

Installation

Inside the Makefile replace the BPATH and MPATH variables for BACKLIGHT and/or KBD to the correct values. The VALUE parameter can be changed to control the size which increases / decreases the brightness. The current setting works for Macbook 11,1. To find the correct files use the find tool as follows:

$ find . -name brightness
/sys/devices/pci0000:00/0000:00:02.0/backlight/acpi_video0/brightness
/sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight/brightness
/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/0003:05AC:025A.0001/input/input5/input5::kana/brightness
/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/0003:05AC:025A.0001/input/input5/input5::numlock/brightness
/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/0003:05AC:025A.0001/input/input5/input5::capslock/brightness
/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/0003:05AC:025A.0001/input/input5/input5::scrolllock/brightness
/sys/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/0003:05AC:025A.0001/input/input5/input5::compose/brightness
/sys/devices/platform/applesmc.768/leds/smc::kbd_backlight/brightness

You can also choose to use /sys/class/backlight/ and/or /sys/class/leds/. Both options work. After setting the correct paths compile using make.

The binaries require SUID and needs to be owned by root.

Usage

$ backlight
backlight [OPTIONS]

	-c	 display current setting
	-d	 decrease brightness
	-i	 increase brightness