What is the best way to implement hotkeys support in Linux (ie support for brightness, audio or keyboard backlight keys)? By "best way" I mean robust, without code duplication, with minimal work required to add support for new hardware.
Setting custom key bindings is already supported by most Linux window managers. You can also get xorg input drivers that recognize things like media and brightness keys. What window manager / desktop environment are you currently using, and what exactly are you trying to do? If you are just trying to get the brightness keys working, you can go into your window manager's keyboard settings, go to keyboard shortcuts, and bind the keys to raise and lower brightness, assuming your window manager has built in support for these two operations. If it doesn't, you can install xbacklight and bind the raise brightness key to xbacklight -inc 1 and the lower brightness key to xbacklight -dec 1.
