Update causes KDE to interfere with DualSense controller

Issues & Assistance
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1

A recent update caused presses of the Option button (which sends meta) to open the application launcher in KDE and steal focus from the game. The game also receives the press. This happens both with Steam Input enabled and disabled. Disabling the keyboard/pointer option in KDE settings for the game controller fixes the issue, but then KDE no longer detects input and launches the screensaver (as it warned me it would).

It is worth noting I do run custom udev rules to disable the touchpad being intercepted by the desktop (which was breaking games that have native dual sense support and need gestures as KDE was stealing the inputs and acting on them).

% cat /etc/udev/rules.d/99-ignore-ds5-touchpad.rules 
# USB Connection
ACTION=="add|change", ATTRS{name}=="Sony Interactive Entertainment DualSense Wireless Controller Touchpad", ENV{LIBINPUT_IGNORE_DEVICE}="1"

# Bluetooth Connection
ACTION=="add|change", ATTRS{name}=="DualSense Wireless Controller Touchpad", ENV{LIBINPUT_IGNORE_DEVICE}="1"
2

In kde settings for the game controller, I found a new checkbox in the top right that said something like enable mouse support. Unchecking that fixed my problems with the dualsense behaving incorrectly.

Edit: I didn’t read your post clearly enough, it seems you’ve already tried this.

3

Interestingly, the screen saver did not turn on after recent updates (but turning the option back on to treat as pointer/mouse returned the broken behavior) while gaming, so it’s not solved… but it’s better? Disabling the “Allow using as pointer and keyboard” option at least doesn’t seem to have any drawbacks.