Adding the file "/etx/X11/xorg.conf" like it was recommended in comment
#5 solved the problem for me:
Section "InputClass"
Identifier "touchpad catchall"
Driver "libinput"
MatchIsTouchpad "on"
MatchDevicePath "/dev/input/event*"
EndSection
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https://bugs.launchpad.net/bugs/1683037
Title:
touchpad mouse not moves hoizontally in kubuntu 17.04.
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