I have been following this thread over the past couple of weeks and
tried several things, including what's outlined in comment #5.

I found that running:

modprobe -r psmouse
modprobe psmouse proto=bare

solves the issue for me. However the caveat is that you don't have
access to advanced touchpad features like scrolling.

The other effect of the above is that both track point and touchpad are
active. I only use the track point. Since I constantly brush against the
touchpad, I am still looking for a way to disable this. With the
settings above, I can no longer disable the touchpad via "System
Settings..." > "Mouse and Touchpad". So, if anyone knows how to do
that....

Oh, to make the above changes permanent, create a file called
"/etc/modprobe.d/47440-mouse.conf" with the content:

options psmouse proto=bare

I hope this helps someone.

Marc.

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https://bugs.launchpad.net/bugs/1258837

Title:
  [Dell Latitude E7440] ALPS touchpad keeps having state reset

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