Cursor acting strangely

[Leonid Grinberg <lgrinberg@gmail.com>]

Hello,

A small problem I have with my mouse is that every once in a while the
cursor suddenly flies across the screen. This usually happens when I
am moving the mouse around and suddenly the cursor gets out of control
and flies (usually the opposite way) across the screen. In a few
seconds it begins obeying me again.

I used to have an old trackball which I threw away due to terrible
precision. I bought a brand new Logitech optical mouse. This started
happening after I got a new monitor and did dpkg-reconfigure
xserver-xfree86 as root. I did not end up changing anything but my
mouse's scroll wheel suddenly lost its functionality to, well, scroll.
After a day or so, I figured out that I need to change the port from
PS/2 to ImPS/2. Ever since then the above mentioned problem (about the
cursor) has begun.

Does anyone have any suggestions as to how to fix it and what is happening?

Thanks,
Leonid Grinberg
lgrinberg@gmail.com