Physical clicks ignored on HP x3 Lap Dock touchpad
With an HP x3 Lap Dock accessory, physical clicks on its touchpad are ignored while it is working fine otherwise. Tap clicks are working as expected when enabled in my DE (Gnome) but physical clicks are not triggering any events at all.
I can see raw events happening upon physical clicks in the HID raw output of the right device in /dev/hidrawX. However, there is no event reported at all for physical clicks with evtest or evemu-record, while other actions (tapping, moving, etc.) are showing in the output.
I'm trying to figure out where the issue is coming from in the stack, feel free to point me to create the issue on another component.
I'm running Debian, with libinput 1.12.6-2 from Testing, with a quite recent Linux kernel built from drm-tip (5.1.0-rc1.20190321). I'll provide some logs / outputs below, feel free to ask for some more.