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[Tim Banchi <tim.banchi@xxxxxxxxx>]

Update to the filed bug:

I found a PS/2 mouse (3-button + wheel Logitech M-SBF96) and connected
it to the PS/2 port of my docking station. I had it connected the whole
day and never I had any issues with non-working left clicks or marking
all texts.

As soon as I connected the Trackman Live! to the PS/2 port the problems
started again after some time.

So apparently there is something amiss with the Trackman Live! connected
to the PS/2 port. If I use the Trackman Live! with a Serial to PS/2
adapter there are no problems.

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https://bugs.launchpad.net/bugs/1363070

Title:
  USB Mouse cursor jumps and buttons get deactivated with two PS/2
  devices connected

Status in xorg package in Ubuntu:
  New

Bug description:
  This happens when two PS/2 devices are connected at the same time and a USB mouse is primarily used (eg using a Laptop with a PS/2 touchpad with an external USB mouse)
  Symptoms: after a while (can be 10 minutes or 1 hour) the mouse cursor starts randomly to jump (mostly down) and up and then the mouse buttons get deactivated (clicking does not have any effect). In that case, moving the mouse marks the underlying text (thus imitating a continuous left-click). This malbehaviour can be temporarily stopped when shortly using one PS/2 device. After a while the same symptoms reappear.

  Setup:
  Dell D430 docked to a Dell D/dock PD01x. The second PS/2 device is an (switched off) Logitech TrackMan Live! (infrared mouse connected via a PS/2 receiver). 
  This bug appears under 12.04 LTS Unity and 14.04 with Xfce, KDE or Unity (always using the latest kernels). Using KDE the bug appears more often than when using XFCE.

  To resolve the issue:
  disconnect the external Trackman Live PS/2 device from the docking station.

  This bug drove me crazy. Only by accident I disconnected the Trackman
  and since then my USB mouse works well again. I verified that the bug
  reappears as soon as I connect the TrackMan again and I used different
  USB mice (as I thought that it might be a USB problem). It did not
  happen under Windows, so it is not hardware related.

  If this bug is going to be followed up I can test with a normal PS/2
  mouse (instead of the TrackMan Live) if the same bug happens or would
  be happy to provide logging data.

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