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====== Backlight ======

  * The following commands with an asterisk expect only one backlight controller at ''/sys/class/backlight''
  * This was only tested on one laptop with ''intel_backlight''
  * See [[#power_management|Power Management notes]] on how to add backlight changes to a udev script
  * See [[https://wiki.archlinux.org/index.php/backlight|backlight]] for more details

====== Controller Name ======

****

  ls '/sys/class/backlight'

====== Query Current Brightness ======

****

  cat '/sys/class/backlight/'*'/brightness'

====== Query Max Brightness ======

****

  cat '/sys/class/backlight/'*'/max_brightness'

====== Set Custom Brightness ======

  * Change ''376'' to desired brightness
  * Desired brightness **must** be under ''max_brightness'' value

  echo "376" | sudo tee '/sys/class/backlight/'*'/brightness' > '/dev/null'

====== Set Max Brightness ======

****

  echo "$(cat '/sys/class/backlight/'*'/max_brightness')" | sudo tee '/sys/class/backlight/'*'/brightness' > '/dev/null'