KDE对多点触控屏的支持没有windows那么优秀，只能使用类似鼠标的单击操作。
下面是直接使用xinput禁用。
thinkt@linux-pw37:/usr/share/X11/xorg.conf.d> xinput
? Virtual core pointer id=2 [master pointer (3)]
? ? Virtual core XTEST pointer id=4 [slave pointer (2)]
? ? Logitech Optical USB Mouse id=10 [slave pointer (2)]
? ? TPPS/2 IBM TrackPoint id=14 [slave pointer (2)]
? ? Melfas LGD AIT Touch Controller id=9 [slave pointer (2)]
? ? SynPS/2 Synaptics TouchPad id=13 [slave pointer (2)]
? Virtual core keyboard id=3 [master keyboard (2)]
? Virtual core XTEST keyboard id=5 [slave keyboard (3)]
? Power Button id=6 [slave keyboard (3)]
? Video Bus id=7 [slave keyboard (3)]
? Sleep Button id=8 [slave keyboard (3)]
? Integrated Camera id=11 [slave keyboard (3)]
? AT Translated Set 2 keyboard id=12 [slave keyboard (3)]
? ThinkPad Extra Buttons id=15 [slave keyboard (3)]
thinkt@linux-pw37:/usr/share/X11/xorg.conf.d> xinput disable 9
也可以修改/usr/share/X11/xorg.conf.d/10-evdev.conf，添加Option "Ignore" "on"
Section "InputClass"
Identifier "evdev touchscreen catchall"
MatchIsTouchscreen "on"
MatchDevicePath "/dev/input/event*"
Driver "evdev"
Option "Ignore" "on"
EndSection
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