Public bug reported:

xserver-xorg-input-synaptics 1.5.99.902-0ubuntu1 caused a regression in
functionality. Three touch taps and click actions, which may be set
using synclient TapButton3=2 and synclient ClickFinger3=2, no longer
function correctly on many touchpads.

Some devices report a higher touch count than the number of touches they
can provide data for. For example, many Synaptics touchpads can report
up to five touches, but only provide data for two of them. We need to be
able to report the correct number of touches for these devices when
there are three touches. Using the maximum of the reported touch count
and the number of touches provided ensures the count is accurate for all
device types.

** Affects: xserver-xorg-input-synaptics (Ubuntu)
     Importance: Low
     Assignee: Chase Douglas (chasedouglas)
         Status: In Progress

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https://bugs.launchpad.net/bugs/971783

Title:
  3 touch taps and clicks are broken

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