Ubuntu 19.04: touchpad of laptop much too sensitive?

I have a new laptop (Clevo N151ZU) running on the Ubuntu 19.04 (Gnome 3.32.1). Unfortunately, the touchpad is much too sensitive, because I have to get very light with the palm of my hand and it reacts to it (and does something I do not want).
Turn off when typing: was initially on, but has brought practically nothing. Besides, I can't use the touchpad while using the keyboard (sometimes I need it in programs / games). This option is gone.
Deactivate when clicking on a click: also drops away. It does have the right buttons, but only using them would be incredibly impractical, as I would use the touchpad frequently (but not always!) With my left hand if left clicking would be a perverting art piece.

Now for my problem: of course, libinput is used. The whole manuals in the net for handball & co detection are, however, for the old synaptics driver under which my touchpad, however, does not work correctly (eg middle click through 3-finger typing does not want anymore). Using the same synaptics options on libinput (in the config file in /usr/share/X11/xorg.conf.d/) does not seem to work - in any case, none of this has done anything (for palm detection), too already "played" with the values.

Unfortunately, xinput does not list a suitable option either:

Issue of ls in /usr/share/X11/xorg.conf.d:

10-amdgpu.conf 10-quirks.conf 40-libinput.conf 70-wacom.conf
10-evdev.conf 10-radeon.conf

In the 40-libinput.conf is located:

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

Section "InputClass"
Identifier "libinput tablet catchall"
MatchIsTablet "on"
MatchDevicePath "/ dev / input / event *"
Driver "libinput"
EndSection

Does one of you know how it works with libinput?

Look (for example with Muon) if the following packages are installed:

xserver-xorg-input-synaptics
kde-config-touchpad

I also once had the problem that I could not configure my touchpad, I then re-installed the kde-config-touchpad package and then it went. See if one of the libinput packages is missing.

How old is your notebook?

The notebook is now 4 days old xD

The first package is the old synaotic driver, which does not work completely.

The 2nd package brings me nothing under Gnome, that would install the entire plasma desktop with.

Okay my mistake, I thought it would be about Kubuntu 19.04. As far as Gnome is concerned, I'm not much help. However, I know that in many areas, Gnome offers fewer options than KDE Plasma, at least in the standard configuration.

You could try using the tool Ukuu the latest stable kernel version (5.1.15) to install. Please also activate the Ubuntu Universe and Multiverserepos in the package sources.

Here is a guide for Ukuu

https://www.omgubuntu.co.uk/2017/02/ukuu-easy-way-to-install-mainline-kernel-ubuntu

I would also contact the support of the notebook manufacturer. After all, the device appears in the list of devices supported for Linux.

Habs even bought at Tuxedo computer. I will ask in this regard.

But yes, I'm also a KDE user, I miss the touchpad settings under Gnome too.