Created attachment 134597 [details] kcm_touchpad X11 KCM Touchpad settings don't allow setting up "clickfinger" Click method also known as "Press anywhere with two fingers" option for right click. Tested this on 2 Thinkpads: T450s and ThinkPad X1 Carbon Gen 8 Under X the option is displayed but is disabled and cannot be enabled. Under wayland this option is completely missing. Under wayland libinput list-devices properly shows the properties are available: Device: Synaptics TM3053-004 Kernel: /dev/input/event17 Group: 8 Seat: seat0, default Size: 97x53mm Capabilities: pointer gesture Tap-to-click: disabled Tap-and-drag: enabled Tap drag lock: disabled Left-handed: disabled Nat.scrolling: disabled Middle emulation: disabled Calibration: n/a Scroll methods: *two-finger edge Click methods: *button-areas clickfinger Disable-w-typing: enabled Accel profiles: flat *adaptive Rotation: n/a It's possible to manually enable the method via dbus: qdbus org.kde.KWin /org/kde/KWin/InputDevice/event17 org.kde.KWin.InputDevice.clickMethodClickfinger true STEPS TO REPRODUCE 1. Open System settings 2. Click on Input Devices category 3. Click on Touchpad Input Devices OBSERVED RESULT Depending if under X11 or wayland the option is disabled or completely missing EXPECTED RESULT Option "Right click" is available and possible to choose via a radio option type with the following choices available: - Press bottom-right corner - Press anywhere with two fingers SOFTWARE/OS VERSIONS Linux/KDE Plasma: Fedora 33 (available in About System) KDE Plasma Version: 5.20.4 KDE Frameworks Version: 5.77.0 Qt Version: 5.15.2
Created attachment 134598 [details] kcm_touchpad wayland
Yes this KCM's user interface is quite buggy. It needs an extensive code overhaul. I'm not surprised that you're experiencing this issue, though I cannot reproduce it.
Created attachment 137622 [details] another_kcm_touchpad X11 I'm experiencing the same (or very similar) issue: right click settings are present under X11 but missing when using Wayland. Plasma 5.21.4 on Arch.
Created attachment 137623 [details] another_kcm_touchpad wayland
It's impossible to activate "tap to click" using one finger and double click with two fingers (5.22.4). How can I configure this in a config file like in X? I'm really wondering why even basics just don't work in Wayland.
On Wayland, all input settings use Libinput. You would need to ask the developers to implement that feature upstream at https://gitlab.freedesktop.org/libinput/libinput/-/issues/
"You would need to ask the developers to implement that feature" This should be referred to adding a config file?
I don't know enough about Libinput to say one way or another, but I suspect not. Please contact them and file a bug for that upstream; there is nothing KDE can do without upstream driver support.
Created attachment 140572 [details] The attached patch enables one finger tapping in libinput (here 1.10.5).
You can already enable one-finger tapping in the UI...
I have to apologize! Got it working via UI after installing an actual libinput (1.18.1). Thanks for your hints!