Pointer Acceleration

Peter Hutterer peter.hutterer at who-t.net
Sun Dec 20 14:56:37 PST 2009

On Sun, Dec 20, 2009 at 10:51:28PM +0100, Simon Thum wrote:
> Gene Heskett wrote:
> > On Saturday 19 December 2009, Simon Thum wrote:
> >> Gene Heskett wrote:
> >>> I would tend to agree.  With modern high resolution mice, I have often
> >>> wished I could set the gain to a below 1 condition.  My mouse now uses
> >>> about a 1" x1.35" area of the pad, to cover a 1680x1250 screen, so its
> >>> way too fast for this user.
> >> I'm not sure I got it. What you describe is 'constant deceleration' (see
> >> http://www.x.org/wiki/Development/Documentation/PointerAcceleration),
> >> however the OP maintains it's not working properly.
> >>
> > It is not, in kde, if I set the pointer accel to 0.5, the slow motion is 
> > normal, the fast motion is slowed, and that 'taint' what we need. :)
> KDE doesn't offer the full feature set of the X.org server. E.g. it
> doesn't allow configuring multiple devices.
> Essentially, what you describe is now a workaround - you're abusing
> acceleration to scale your device. KDE alone won't let you do better.

> > What we need is the ability to scale the input down, and then apply the accel 
> > rules as usual.  These 1600-3200 dpi optical mice will be the death of me 
> > yet!
> Exactly what is implemented in X server 1.6 and above. See the wiki
> page I gave above.

I think we* need to either implement the desktop integration soon or nudge
the people capable of doing so. Having it exposed in the server is only half
the solution.


* "we" as the "not me"

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