Plasma Mouse wheel scrolling speed?​

English Applications
1

Where can i set this?
“System settings -> Input -> Mouse” is not helpful.

Anyone?

thanks!

2

It appears that this option was dropped in 15.2. In 15.1 you could find it in System settings -> Input -> Mouse -> Advanced tab -> Mouse will Scrolls -> [number of lines].

This changes file ~/.config/kdeglobals entry WheelScrollLines value under [KDE].

But this line is still there in 15.2, set to 3. So perhaps if you edit this file?

3

I don’t have such an entry. Are you sure that you just don’t have a “legacy” config?

4

Just in case this KDE thread is of interest…
https://forum.kde.org/viewtopic.php?f=309&t=160416

This reddit thread may also be of interest…
https://www.reddit.com/r/kde/comments/id6nzg/any_way_to_increase_mouse_scroll_speed/
Perhaps using the synaptics Xorg driver is an acceptable workaround in this situation?

5

Maybe. This was an upgrade from 15.1 to 15.2.

This is the KDE section:

[KDE] 
AnimationDurationFactor=0.500000 
ColorScheme=Breeze 
DoubleClickInterval=400 
ShowDeleteCommand=false 
ShowIconsInMenuItems=true 
ShowIconsOnPushButtons=true 
SingleClick=true 
StartDragDist=4 
StartDragTime=500 
**WheelScrollLines=3 **
contrast=4 
widgetStyle=fusion

Oh, and if I change that 3 to 6 and restart the session, scrolling in kate goes twice as fast. So I suppose it works…

6

Ok, good to know. FWIW, I’m using the KDE repos, so I have

Operating System: openSUSE Leap 15.2
KDE Plasma Version: 5.20.90
KDE Frameworks Version: 5.79.0
Qt Version: 5.15.2
7

Thanks so far.

This does not work on my side. I have Leap 15.2 stock KDE.
Adding WheelScrollLines=6 is not helpful.
**
But
**As this quoted KDE bug below mentions, libinput is the culprit.
Commenting out the first section (MatchIsPointer “on”) in /etc/X11/xorg.conf.d/40-libinput.conf disabled libinput support for the mouse and then automatically “evdev” is used.

The Mouse settings in KDE are now more featureful.

8

Another one is the sloooooowwwww scrolling speed in Firefox…
Even after increasing the KDE mouse wheel scroll lines to 12 (maximum) Firefox scroll speed is terribly slow.

9

For Firefox: Open a tab and type “about:config”, then search for “mousewheel.min_line_scroll_amount”, change the numerical value to suit.

10

thanks - this improved it alot!

11

Curious, my 15.2 40-libinput.conf pointer section reads:

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

It is not commented out in the other sections too (keyboard, touchpad, etc.

And changing the WheelScrollLines as in my previous post works here.

12

I figured that libinput is the culprit on 15.2 for the missing advancded mouse KDE system settings.
So i removed xf86-input-libinput and voila … more mouse settings are visible in KDE.

So i set mouse wheel scrolling speed to a higher value: 7 lines per mouse-wheel tick.

It had some effects:

  • in kate the scrolling speed went up -> good
  • with vivaldi scrolling speed stayed the same -> bad
  • firefox scrolling speed was manually adjusted as mentioned earlier in this thread

Why is this such a pain to have a convenient scrolling behaviour?

13

KDE Bugreport (https://bugs.kde.org/show_bug.cgi?id=403842) references to X.org libinput patch (https://gitlab.freedesktop.org/xorg/driver/xf86-input-libinput/-/merge_requests/12)