In message <dcrcbg$mns$1@colwyn.zhadum.de>, Matthias Scheler writes:
>[*] NetBSD resets the PS/2 mouse post on the first click more movement after
>    I switch back to the port with the P2/S connected NetBSD machine. If I
>    try to use the mouse during the reset I get random mouse events.

This is related to a flaw in the behavior of some switches which causes them
to change protocols on the fly, switching from the 3-button PS/2 protocol to
one of the scroll-wheel protocols, or back.

-s