bug#57526: 29.0.50; Precise pixel-scrolling works great with touchpad but not with mouse wheel

[Po Lu]

Tassilo Horn <tsdh@gnu.org> writes:

> The short list is:
>
> ❯ xinput list
> WARNING: running xinput against an Xwayland server. See the xinput man page 
> for details.
> ⎡ Virtual core pointer                        id=2    [master pointer  (3)]
> ⎜   ↳ Virtual core XTEST pointer                      id=4    [slave  pointer 
>  (2)]
> ⎜   ↳ xwayland-pointer:39                             id=6    [slave  pointer 
>  (2)]
> ⎜   ↳ xwayland-relative-pointer:39                    id=7    [slave  pointer 
>  (2)]
> ⎜   ↳ xwayland-pointer-gestures:39                    id=8    [slave  pointer 
>  (2)]
> ⎣ Virtual core keyboard                       id=3    [master keyboard (2)]
>     ↳ Virtual core XTEST keyboard                     id=5    [slave  
> keyboard (3)]
>     ↳ xwayland-keyboard:39                            id=9    [slave  
> keyboard (3)]
>
> Interestingly, that list is the same no matter if I plugged my mouse
> into my notebook's USB slot or if it is not connected.

Ah, you're using Xwayland.

Unfortunately, that X server is not implemented properly, so the X build
of Emacs cannot determine the source of wheel movement correctly.