https://bugs.kde.org/show_bug.cgi?id=357618

            Bug ID: 357618
           Summary: scrolling with xf86-input-libinput is unusable slow -
                    only in dolphin
           Product: dolphin
           Version: 15.12.0
          Platform: Archlinux Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-n...@kde.org
          Reporter: plusf...@gmail.com

shen you're using xf86-input-libinput instead of other input systems for X11,
scrolling in dolphin is that slow that you dont wanna use it anymore. for now
it seems to be the only app that is effected.
other framework5 things like gwenview, kmail, as well as Qt5 apps like
tomahawk-qt and even other toolkit things like inkscape, gimp, chrome/ium
firefox scroll in the same way as always

Reproducible: Always

Steps to Reproduce:
1. install xf86-input-libinput (and activate, if not by default)
2. restart PC
3. open dolphin and scroll

Actual Results:  
it is now slow ....

Expected Results:  
should be the same as in all other apps

/usr/share/X11/xorg.conf.d/90-libinput.conf


# Match on all types of devices but tablet devices and joysticks
Section "InputClass"
        Identifier "libinput pointer catchall"
        MatchIsPointer "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput keyboard catchall"
        MatchIsKeyboard "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput touchpad catchall"
        MatchIsTouchpad "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

Section "InputClass"
        Identifier "libinput touchscreen catchall"
        MatchIsTouchscreen "on"
        MatchDevicePath "/dev/input/event*"
        Driver "libinput"
EndSection

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