I have been noticing this problem ever since I installed MATE. Whenever I boot up my computer my mouse always moves to the top of the screen quickly (like if someone plugged in a second mouse and I have to wrestle with it).I looked at lshw and found nothing out of the ordinary, but with xinput I  found this odd entry:    PS/2 Generic Mouse                        id=13   [slave  pointer  (2)]I disabled it and the problem is gone. I checked my computer and found no physical device plugged in that could be causing this. So my question is what is causing this problem?Thanks for any help.
Strange device appears in xinput
mouse;input