[Wayland-bugs] [Bug 89426] Add support for touch arbitration

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89426

            Bug ID: 89426
           Summary: Add support for touch arbitration
           Product: Wayland
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: libinput
          Assignee: wayland-bugs at lists.freedesktop.org
          Reporter: benjamin.tissoires at gmail.com

When using a combo touchscreen/tablet (with pen input), the kernel does not
always provide an arbitration between the touch and the pen.
This is the case for N-trig devices which are following the HID spec (found on
the MS Surface 3 for instance).

Libinput should disable at least the corresponding touch when the pen of the
same group is in proximity.
We could also be smart and disable only the touch points under the palm if the
stylus reports the Tilt (which gives us an indication if the user is left
handed or right handed).

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