Subject: Re: Mouse movement handling in wsmouse and opms
To: Matthias Scheler <>
From: Lennart Augustsson <>
List: tech-kern
Date: 08/07/1999 18:05:46
Matthias Scheler wrote:

> 1.) The old PS/2 driver keeps track of all mouse movements in internal
>     variables and returns a single delta pair on an ioctl() call.
> 2.) The wsmouse driver reports each mouse movement as a single event in
>     a queue.
> The question is which behaviour is the correct one? IMHO it is 1) because
> it avoids problems like the on described in PR 8127.

I think there should be some kind of motion compression.  You can imagine
different solutions:
 * if the event queue exceeds a certain length you start collapsing
   events to make it shorter.
 * if events occur close in time you collapse them.


        -- Lennart