On 07/24 00:01, Bryan P wrote:
> Hello,
> 
> I have a PS/2 Logitech trackball mouse with 4 buttons.  I connect it to my
> NetBSD-current laptop via a PS/2 -> USB converter.  Three of the buttons
> work fine (in X).  The fourth has no effect and generates no event under
> xev.  I also have a scrollwheel touchstrip on my laptop that I've
> successfully set up to work as a scroll wheel under X.  Both input devices
> can work fine simultaneously under X.  Is there any way I can get that 4th
> button to work?

mouse(4) has:
       Option "Buttons" "integer"
              Specifies  the  number  of mouse buttons.  In cases
              where  the  number  of  buttons  cannot  be   auto-
              detected, the default value is 3.

Perhaps setting that to 4 will work.