EDIT: I wrote all of this with the assumption that you were talking about scrolling speed rather than cursor/pointer speed. For the latter everything is the same except for the "VertScrollDelta" option.
Also most of these things can be changed using a GUI on Kubuntu (or presumably with any other distro with KDE as the desktop environment)
You might find a solution from configuring
synaptics. You can read about all the possible
Options from command line using
man synaptics or from this online version of manpages.
I did something similar on an Ubuntu 16.04 based distro (Elementary OS Loki) just now.
If you find some
Option there that you would like to change, you can probably (I couldn't on Elementary OS) test it with
YOUR_OPTION_HERE - Might be VertScrollDelta for example.
YOUR_NUMBER_HERE - Since I didn't change this particular value I have no idea what numbers might be suitable for this one (they have to be integers though).
And when you're finished trying the changes out, there's 2 ways to make your changes permanent:
The xorg.conf way
In my case
/usr/share/X11/xorg.conf.d/50-synaptics.conf instructed me to first copy the config file:
sudo cp -a /usr/share/X11/xorg.conf.d/50-synaptics.conf /etc/X11/xorg.conf.d/50-synaptics.conf
Then I edit the new file with my editor of choice. GUI editors (e.g.
sudo -H in front of them and CLI ones (e.g.
emacs) can be run with simply
sudo I believe.
sudo -H YOUR_EDITOR_HERE /etc/X11/xorg.conf.d/50-synaptics.conf
In that file you add your new lines into a suitable spot. Possible example:
Identifier "touchpad catchall"
Option "YOUR_OPTION_HERE" "YOUR_NUMBER_HERE"
Restart (relogging might also work) and see if it changed.
The synclient way
(This one I did not test myself. Some credits to weberc2.)
Add the following line to your Startup Applications:
If you can't find any more convenient way to do it, then this is one way to accomplish that (tested on Ubuntu and Kubuntu):
Create a new file at
/home/YOUR_USERNAME_HERE/.config/autostart with whatever name. It should have the
.desktop extension (name ending). Open your new file with an editor (no
sudo needed this time) and write:
I'm not actually certain which of these lines are absolutely necessary, but any extra lines shouldn't hurt. The
Exec line is most important.
Save your file. Close it. Restart (relogging might also work) and see if it changed.