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[Jont Allen <jontalle@xxxxxxxxxxxx>]

Is this piece of information relevent to my problem?

https://wiki.archlinux.org/index.php/Lenovo_ThinkPad_X250#Mouse

Mouse

The touchpad and TrackPoint work out of the box, but the physical buttons for the trackpoint do not. You will need to install xf86-input-synaptics.
Note: The most recent Linux kernels (at least 4.0.5) support TrackPoint buttons out of the box. The following information pertains only to older versions of the kernel.

If you would rather not install a recent kernel, there is a work around
for Linux 3.19.2-ARCH. If you add options psmouse proto=imps to
/etc/modprobe.d/x250.conf, you can force the mouse module to use a more
basic protocol than the built in one for the TrackPoint, which needs a
patch. The effect is that the touchpad and mouse are treated as one
device, but synaptics is not supported. If you want two finger
scrolling, for example, you will need to either deal with the broken
TrackPoint buttons are install the new module.

Jont ALlen

-- 
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Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1506817

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

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I have reported the details of this problem at
  https://answers.launchpad.net/ubuntu-certification/+question/272142

  As summarized on that question:

  X250 analysis:
   I used the command on the X250
    evtest /dev/input/event15 | grep EV_KEY

   I can see the bug, as follows:

  I click on button 1 (left) over and over. When I push the button down,
  I see it register as 1,
  and when I let go of the key, it registers as a 0.

  The bug is that every now and then (once every 20 clicks), when I let go
  of the left mouse button (BIN_LEFT), it does not return to state 0 (it stays in state 1).

  This is highly random, but cant be triggered more often, by dragging a
  window, which I do with BIN_LEFT.

  I am using a brand new X250, purchased in late July 2015. The system was returned 3 times to IBM repair as I assumed
  this was a hardware error. Now with the above, it seems clear that this is a software issue.

  Ubuntu 15.04

  apt-cache policy xserver-xorg-input-synaptics
  xserver-xorg-input-synaptics:
    Installed: 1.8.1-1ubuntu1
    Candidate: 1.8.1-1ubuntu1
    Version table:
   *** 1.8.1-1ubuntu1 0

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: xserver-xorg-input-synaptics 1.8.1-1ubuntu1
  ProcVersionSignature: Ubuntu 3.19.0-30.34-generic 3.19.8-ckt6
  Uname: Linux 3.19.0-30-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.5
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Oct 16 04:52:03 2015
  DistUpgraded: Fresh install
  DistroCodename: vivid
  DistroVariant: ubuntu
  InstallationDate: Installed on 2015-08-15 (61 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  MachineType: LENOVO 20CMCTO1WW
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-30-generic.efi.signed root=UUID=5718b40f-944e-47a3-acda-04e29336d0bc ro quiet splash vt.handoff=7
  SourcePackage: xserver-xorg-input-synaptics
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/19/2015
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N10ET36W (1.15 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20CMCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: 0B98417 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: dmi:bvnLENOVO:bvrN10ET36W(1.15):bd06/19/2015:svnLENOVO:pn20CMCTO1WW:pvrThinkPadX250:rvnLENOVO:rn20CMCTO1WW:rvr0B98417WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20CMCTO1WW
  dmi.product.version: ThinkPad X250
  dmi.sys.vendor: LENOVO
  version.compiz: compiz 1:0.9.12.1+15.04.20150410.1-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.60-2
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.5.9-2ubuntu1~vivid2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.5.9-2ubuntu1~vivid2
  version.xserver-xorg-core: xserver-xorg-core 2:1.17.1-0ubuntu3.1
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.5.0-1ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917-1~exp1ubuntu2.2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2build1
  xserver.bootTime: Fri Oct 16 03:31:10 2015
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                1079 
   vendor                                     LGD
  xserver.version: 2:1.17.1-0ubuntu3.1

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