Public bug reported:

When I click with a mouse, it is fairly easy to not move the mouse while
clicking.

With a touchscreen, it is more difficult. Tapping with the finger means that 
the finger rolls on the screen. (It's not that exact like it is with a mouse)
A small movement of just one pixel is interpreted my applications as drag, but 
not as click.
Tested on the WeTab.

My suggestion: snap the mouse position for touchscreens when the finger
moved less than 5 pixels and less than 100 ms.

** Affects: xserver-xorg-input-evdev (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1121243

Title:
  touch is too sensitive

Status in “xserver-xorg-input-evdev” package in Ubuntu:
  New

Bug description:
  When I click with a mouse, it is fairly easy to not move the mouse
  while clicking.

  With a touchscreen, it is more difficult. Tapping with the finger means that 
the finger rolls on the screen. (It's not that exact like it is with a mouse)
  A small movement of just one pixel is interpreted my applications as drag, 
but not as click.
  Tested on the WeTab.

  My suggestion: snap the mouse position for touchscreens when the
  finger moved less than 5 pixels and less than 100 ms.

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https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/1121243/+subscriptions

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