> From: Ulf Brosziewski
> Date: Tue, 12 Jul 2016 23:17:34 +0200
>
> It seems that if an MT device is disabled and reenabled,
> remnants of the previous MT state can lead to problems.
> wsmouse_mt_init should always reset that state completely
> (thanks to jcs@ for help).
>
> OK?
Makes sense to me.
> Index: dev/wscons/wsmouse.c
> ===
> RCS file: /cvs/src/sys/dev/wscons/wsmouse.c,v
> retrieving revision 1.31
> diff -u -p -r1.31 wsmouse.c
> --- dev/wscons/wsmouse.c 5 Jul 2016 19:33:14 - 1.31
> +++ dev/wscons/wsmouse.c 12 Jul 2016 21:01:17 -
> @@ -1266,11 +1266,8 @@ wsmouse_mt_init(struct device *sc, int n
> &((struct wsmouse_softc *) sc)->input;
> int n, size;
>
> - if (num_slots == input->mt.num_slots
> - && (!tracking == ((input->flags & MT_TRACKING) == 0)))
> - return (0);
> -
> free_mt_slots(input);
> + memset(&input->mt, 0, sizeof(struct mt_state));
>
> if (tracking)
> input->flags |= MT_TRACKING;
>
>