Public bug reported:

I'm using an Acer Aspire E13 laptop (ES1-311-C82S) with an Elantech
touchpad under elementary OS Freya. After updating the kernel to version
3.19.0-58-generic, the touchpad is only recognized as a PS/2 Generic
Mouse as reflected by the attached output files. All multi-touch
gestures such as two-finger scrolling or right clicking using two
fingers do not work anymore. However, clicking by tapping and right
clicking by using the bottom right area of the touchpad still works.

For reference, everything works as intended under 3.19.0-39-generic,
including multi-touch gestures. `xinput` lists an `ETPS/2 Elantech
Touchpad` rather than the generic mouse.

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

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https://bugs.launchpad.net/bugs/1570582

Title:
  Touchpad recognized as generic mouse after upgrade, only mouse
  features working

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