Comment 21 for bug 1414930

Kernel patches proposed:
  http://www.spinics.net/lists/linux-input/msg36219.html

udev hwdb addition to mark devices like this:
http://cgit.freedesktop.org/systemd/systemd/commit/hwdb/70-touchpad.hwdb?id=001a247324b44c0e0b8fdba41a6fc66e7465b8b6

libinput patches proposed:
  http://lists.freedesktop.org/archives/wayland-devel/2015-January/019661.html

synaptics patch proposed:
  http://lists.x.org/archives/xorg-devel/2015-January/045464.html

And a writeup of what's happening:
http://who-t.blogspot.com.au/2015/01/lenovos-x1-carbon-3rd-touchpad-woes.html