awesome/awesome-wm-widgets/brightness-widget/README.md

Brightness widget

This widget represents current brightness level.

Installation

Firstly you need to get the current brightness level. There are two options:

• using xbacklight command (depending on your video card (I guess) it may or may not work)

  To check if it works install xbackligth and check if it works:

  sudo apt-get install xbacklight
  xbacklight -get
  

  If there is no output it means that it doesn't work, but there is a second option:

• using light command

  Install it from this git repo: github.com/haikarainen/light and check if it works but running

  git clone https://github.com/haikarainen/light.git && \
  cd ./light && \
  sudo make && sudo make install \
  light -G
  49.18
  

Depending on the chosen option change GET_BRIGHTNESS_CMD variable in brightness.lua.

Then in rc.lua add the import on top of the file and then add widget to the wibox:

require("awesome-wm-widgets.brightness-widget.brightness")
...
-- Add widgets to the wibox
s.mywibox:setup {
...
{ -- Right widgets
...
brightness_widget

Controls

In order to change brightness by shortcuts you can add them to the globalkeys table in the rc.lua:

awful.key({ modkey         }, ";", function () awful.spawn("light -A 5") end, {description = "increase brightness", group = "custom"}),
awful.key({ modkey, "Shift"}, ";", function () awful.spawn("light -U 5") end, {description = "decrease brightness", group = "custom"}),

On laptop you can use XF86MonBrightnessUp and XF86MonBrightnessDown keys.