Mouse wheel acceleration problem

[Heinz Diehl]

Hi,

after updating F21->F22, I noticed immediately that the mouse wheel
has got some nasty acceleration. Example: I open a large pdf
document, and as soon as I begin to scroll, I'm on the last
page. After that, scrolling works at normal speed. The same happens
when scrolling a website in Firefox: at first wheel action the scroll
speed is extremely high, and at the next touch, all is back to normal.

This behaviour is driving me insane, and I could't find a solution so far.
Is it something with XFCE, Xorg, whatever? I don't know.

Is anybody here encountering the same phenomenon, and what to do about
it?

What I know so far is that it came with the F22 update.

Thanks,
 Heinz

[Barry Scott]

On Sun 19 Jul 2015 10:44:45 Heinz Diehl wrote:
> Hi,
>
> after updating F21->F22, I noticed immediately that the mouse wheel
> has got some nasty acceleration. Example: I open a large pdf
> document, and as soon as I begin to scroll, I'm on the last
> page. After that, scrolling works at normal speed. The same happens
> when scrolling a website in Firefox: at first wheel action the scroll
> speed is extremely high, and at the next touch, all is back to normal.
>
> This behaviour is driving me insane, and I could't find a solution so far.
> Is it something with XFCE, Xorg, whatever? I don't know.
>
> Is anybody here encountering the same phenomenon, and what to do about
> it?
>
> What I know so far is that it came with the F22 update.
>
> Thanks,
>  Heinz

Check that you do not have two input drivers installed.

You should have: xorg-x11-drv-evdev 
But may also have xorg-x11-drv-libinput

I fixed an issue with reverse scrolling in KDE by removing
the xorg-x11-drv-libinput package.

Barry

[Michael Cronenworth]

On 07/23/2015 11:41 AM, Barry Scott wrote:
> I fixed an issue with reverse scrolling in KDE by removing
>
> the xorg-x11-drv-libinput package.

While this may be a solution it is a temporary one.

The libinput driver and library will be used in Wayland so when we all make the 
switch your issue may return.

I suggest filing a bug against the xorg-x11-drv-libinput package. They are busy 
fixing many acceleration related issues.

[Barry Scott]

On Thu 23 Jul 2015 12:34:26 Michael Cronenworth wrote:
> On 07/23/2015 11:41 AM, Barry Scott wrote:
> > I fixed an issue with reverse scrolling in KDE by removing
> >
> > the xorg-x11-drv-libinput package.
>
> While this may be a solution it is a temporary one.
>
> The libinput driver and library will be used in Wayland so when we all make
> the switch your issue may return.
>
> I suggest filing a bug against the xorg-x11-drv-libinput package. They are
> busy fixing many acceleration related issues.

Bug exists at least for KDE and developer has confirmed that they are working on 
a better solution for mouse handling. Which I am assuming will cover libinput.

Barry