[Wayland-bugs] [Bug 105043] 3-fingers touch occasionally fails to get detected

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105043

--- Comment #8 from Hi-Angel <Hi-Angel at yandex.ru> ---
Okay, I caught the flow when 3-fingers touch is not detected, and nothing
happens. It looks like 2-finger touch and 1-finger touches at close time, e.g.:

Sample 1:

        E: 34.311155 0001 0145 0001     # EV_KEY / BTN_TOOL_FINGER      1
        E: 34.334286 0001 0145 0000     # EV_KEY / BTN_TOOL_FINGER      0
        E: 34.334286 0001 014d 0001     # EV_KEY / BTN_TOOL_DOUBLETAP   1
        E: 34.457612 0001 014d 0000     # EV_KEY / BTN_TOOL_DOUBLETAP   0

Sample 2:

        E: 47.998600 0001 014d 0001     # EV_KEY / BTN_TOOL_DOUBLETAP   1
        E: 48.072614 0001 0145 0001     # EV_KEY / BTN_TOOL_FINGER      1
        E: 48.072614 0001 014d 0000     # EV_KEY / BTN_TOOL_DOUBLETAP   0
        E: 48.116407 0001 0145 0000     # EV_KEY / BTN_TOOL_FINGER      0

Sample 3:

        E: 73.864204 0001 014d 0001     # EV_KEY / BTN_TOOL_DOUBLETAP   1
        E: 73.968262 0001 0145 0001     # EV_KEY / BTN_TOOL_FINGER      1
        E: 73.968262 0001 014d 0000     # EV_KEY / BTN_TOOL_DOUBLETAP   0
        E: 73.995397 0001 0145 0000     # EV_KEY / BTN_TOOL_FINGER      0

Sample 4:

        E: 82.847529 0001 0145 0001     # EV_KEY / BTN_TOOL_FINGER      1
        E: 82.881636 0001 0145 0000     # EV_KEY / BTN_TOOL_FINGER      0
        E: 82.881636 0001 014d 0001     # EV_KEY / BTN_TOOL_DOUBLETAP   1
        E: 82.983867 0001 014d 0000     # EV_KEY / BTN_TOOL_DOUBLETAP   0

Worth emphasizing that for some reason these does not cause any action at all.
E.g. I have selected a text, and rationally after such a misdetected touch
shall happen either α) a menu pops up, or β) the selected text gets unselected.
The samples I shown above cause neither α nor β, like if they get completely
ignored by libinput.

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