Multimedia keyboards
From wikinotes
Toggle Fn/F* keys
Fn + Capslock # toggles fn-keys vs f-keys (at least logitech)
Prefer FunctionKeys to MediaKeys
# temporary: su echo 2 >> /sys/module/hid_apple/parameters/fnmode # permanent: echo "options hid_apple swap_opt_cmd=1" > /etc/modprobe.d/hid_apple.conf