[Wayland-bugs] [Bug 93473] Thumb and two finger scroll does not work

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93473

Peter Hutterer <peter.hutterer at who-t.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #1 from Peter Hutterer <peter.hutterer at who-t.net> ---
This isn't something we can fix, sorry. The touchpad can only track two fingers
at a time, once you put a third finger down we cannot track that position. This
makes it hard to figure out where the fingers are and thus thumb/palm detection
cannot work.

IIRC we had some code to work around this but it was too unreliable, so we
ripped it out and went for the simple and predictable "don't put a third finger
down when two-finger scrolling" approach instead.

On the positive side, some kernel changes we've been working on should make the
touchpad capable of 5 touches, which then means we can fix this bug. You'll
need to wait until those kernel changes are done though.

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