keymaps/lenovo-thinkpad-usb-keyboard-trackpoint

   1 0x90012 screenlock       # Fn+F2
   2 0x90013 battery          # Fn+F3
   3 0x90014 wlan             # Fn+F5
   4 0x90016 switchvideomode  # Fn+F7
   5 0x90017 f21              # Fn+F8  touchpad toggle
   6 0x90019 suspend          # Fn+F12
   7 0x9001A brightnessup     # Fn+Home
   8 0x9001B brightnessdown   # Fn+End
   9 0x9001D zoom             # Fn+Space
  10 0x90011 prog1            # ThinkVantage button
  11
  12 0x90015 camera           # Fn+F6 headset/camera VoIP key  ??
  13 0x90010 f20              # Microphone mute button; should be micmute, but see https://mail.gnome.org/archives/commits-list/2013-January/msg05822.html