* Lenovo MIIX 720 is a tablet with a detachable keyboard. To keep
  the volume rockers on the tablet enabled even when the keyboard
  is detached, add `ModelTabletModeNoSuspend=1` to the internal
  keyboard.
* The external keyboard is a keyboard-touchpad combo. Assign
  `AttrTPKComboLayout=below` to the touchpad to allow features
  like disable-while-typing and palm-detection.