Pointer Acceleration

Justin Piszcz jpiszcz at lucidpixels.com
Fri Dec 18 06:52:32 PST 2009

On Fri, 18 Dec 2009, Lorenz Ruhmann wrote:

> Hi,
> After quite some testing of the new predictable pointer code introduced
> with version 1.6 I have a question.
> My mouse is a Logitech MX 518 set to 1600 dpi via lomoco and using HAL.
> With the old pointer acceleration code (now lightweight scheme) my mouse
> cursor behaves perfectly with the following command:
> xset m 16/100 1
> Even for far and fast mouse movement I can accurately hit small objects.
> However, I'm not able to reproduce that accuracy with the new code. I
> tried the Simple Profile (4) with a ConstantDeceleration of 6.25 and
> xset m 1 1, but it just doesn't feel right; neither does polynomial
> acceleration.
> Is there a way to exactly reproduce this old behavior with the new code?
> I don't like to rely on a scheme that is kinda considered obsolete.
> Regards,
> Lorenz Ruhmann
> _______________________________________________
> xorg mailing list
> xorg at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/xorg

Yes, this is VERY annoying to me as well (all of the new acceleration 
methods except the old one):

Add this to your:

$ cat 10-x11-input.fdi 
<match key="info.capabilities" contains="input.mouse">
    <merge key="input.x11_options.AccelerationScheme" type="string">lightweight</merge>

Then restart X/hal/etc, then the old xset works properly.


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