https://bugs.kde.org/show_bug.cgi?id=415179

--- Comment #7 from akb825 <akb...@gmail.com> ---
After some investigation, it looks like the current issue is caused because
there's a second touchpad device (PS/2 Synaptics TouchPad) that shows up in the
xinput device list. The ordering of the list is inconsistent between boots, and
it will incorrectly disable the touchpad when the PS/2 Synaptics TouchPad is on
top.

When I disable this extra touchpad device, it looks like it works around the
issue. Therefore, the new workaround for the Xorg config is:

Section "InputClass"
    Identifier "Ignore synaptics touchpad"
    MatchProduct "PS/2 Synaptics TouchPad"
    MatchIsTouchpad "on"
    Option "Ignore" "on"
EndSection

Just to note, I do not have the xf86-input-synaptics package installed, so the
Synaptics device seems to be detected even with the default X11 packages.

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