Update:
As requested in comment # 11, I have downloaded the latest kernel and installed 
it on my X250.
The version I have installed is
uname -a
Linux near 4.5.0-040500rc3-generic #201602071930 SMP Mon Feb 8 00:34:43 UTC 
2016 x86_64 x86_64 x86_64 GNU/Linux

There was no issue downloading this kernel and the headers. I then rebooted and 
via grub, was able to boot the kernel.
There were no issues.

I have been using the kernel  for 5 or 6 hours, and have not seen any mouse 
click issues. 
It seems to have solved the problem.

With the previous kernel vmlinuz-4.2.0-27-generic.efi.signed I was seeing mouse 
click errors at least once per min, and 
frequently much more (up to 50% of the mouse clicks)

So I feel it is save to say that the new kernel has solved the problem.

Whats next?
So the next think I will try is to book the 4.2.027 kernal and see the problem 
return.
Then I will remove my "hacks" to the setup,
I will also turn back on the touch-pad in the bios (right now its turned off).

Thus I will return the machine to its normal state and verify that the new 
kernel is still working (no mouse click errors).
This will take me a day to two.
Then I will deliver a final report.

So awaiting that final report, it seems the problem is solved
(tentatively pending further notice).

END

** Changed in: linux (Ubuntu)
       Status: Incomplete => New

** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1506817

Title:
  left TPP/2 IBM TrackPoint "sticks on" randomly (X250 15.04)

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