keycode 222 = XF86PowerDown
keycode 121 = XF86AudioMute
keycode 122 = XF86AudioLowerVolume
keycode 123 = XF86AudioRaiseVolume
keycode 162 = XF86AudioPlay
keycode 144 = XF86AudioPrev
keycode 153 = XF86AudioNext
keycode 164 = XF86AudioStop
keycode 162 = XF86AudioPause