[PLUG] Trackball middle button pastes string twice

[Ali Corbin]

On Mon, Jun 5, 2017 at 7:21 AM, Rich Shepard <rshepard at appl-ecosys.com>
wrote:

>    This behavior started over the weekend and is quite annoying. When I
> press
> the two small buttons on the Logictech Marble trackball (emulating the
> middle button on a 3-button mouse in 10-evdev.conf) the highlighted string
> is inserted twice.
>
>    Web searches find only a couple of results specific to linux, one
> apparently related to a tool on Arch, the other with xfce4 that had a
> second
> post by the thread offer noting the problem was the mouse. Neither had
> useful information for me. Most other results asked how to disable pasting
> with the middle mouse button.
>
>    I welcome any and all suggestions on identifying the source of this
> behavior.
>

I'd start with xev, to see exactly what the trackball is sending.
Also, if you happen to have another trackball stashed away, try it.
Ali