[Wayland-bugs] [Bug 94953] libinput api should be changed to allow window managers/desktop environments to specify higher mouse speeds

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94953

Peter Hutterer <peter.hutterer at who-t.net> changed:

           What    |Removed                     |Added
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                 CC|                            |peter.hutterer at who-t.net
           Assignee|wayland-bugs at lists.freedesk |peter.hutterer at who-t.net
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--- Comment #1 from Peter Hutterer <peter.hutterer at who-t.net> ---
(In reply to Jonas Thiem from comment #0)
> libinput api should be changed to allow window managers/desktop environments
> to specify higher mouse speeds. Basically, I like somewhat obscene mouse
> speeds which I understand are beyond what a usual user might be using since
> I prefer to use my input devices precisely rather than make huge movements.

I'm confused, that last statement is add odds with itself. A high speed
generally means huge movements rather than precision (though we try to work
around this in libinput's accel curve).

> On all Thinkpad laptops (3 entirely different models) I have seen the
> highest trackpoint mouse device sensitivity possible in Linux/GNOME is below
> what I find preferable, with varying degrees of uncomfortableness. Also,
> most low-dpi cheaper mouses move way too slow for my likings even at maximum
> speed (tested a logitech, acer and another vendor I forgot).

the trackpoint is often slow out of the box which is why we have this:
https://github.com/systemd/systemd/blob/master/hwdb/70-pointingstick.hwdb
do you have any of these settings applied to your device?

also, did the low-dpi mice have hwdb entries to specify their DPI?


> However, the GNOME developers say they cannot even provide a hidden(!)
> option somewhere in gconf/dconf for a multiplier to speed up the mouse speed
> like 2x or even 3x times in overall, since the libinput API clamps at some
> arbitrary 1.0 speed limit which is exactly the not-very-fast maximum
> available using the slider in the GNOME mouse settings.

the [-1, 1] range is simply a normalization of the speed into some range, for
the range where the acceleration curve is defined. it doesn't correspond to
anything, on most mice the value 1.0 means 4x the native device speed so you
have 1/1000 of an inch correspond to 4 pixels of movement.

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