Gamepad
This article covers gamepads, joysticks and other game controllers.
With eudev
By default, only members of the input group can access gamepad and joystick devices. However, making users members of the input has a negative security impact on which processes can obtain raw keyboard and mouse input.
To grant members of the plugdev group access to gamepads, create an udev rule. For example, /etc/udev/rules.d/90-joysticks.rules:
ACTION=="add", KERNEL=="js[0-9]*", SUBSYSTEM=="input", RUN+="/bin/chown root:plugdev /dev/input/js%n"
Reload all rules with
udevadm control --reload
The (re)connect the game controller.