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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1487334

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1487334

Title:
  Touchpad tap-event support broken since kernel 3.19.0-25

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Release: Ubuntu 15.04
  Hardware:  Logitech TK820 wireless keyboard with touchpad

  I've been using the said hardware with ubuntu in all releases since
  13.10 without problems. All touchpad features were working fine until
  I received in 15.04 the automatic update to kernel version 3.19.0-22.
  This kernel introduced a condition in which, at times, the system
  started randomly registering keyboard input when pointing with the
  touchpad.

  The original bug got apparently fixed in kernel version 3.19.0-25, but
  as a result this kernel version broke completely all tap-events for my
  touchpad. They are not registering at all. Pointing and scrolling
  work, so do the mechanical click-switches in the corners, but tapping
  or sweeping with one or more fingers does not get registered even
  though the settings were never touched. I now got kernel update to
  3.19.0-26, but the bug persists in this version, too.

  At the moment I had to revert back to kernel version 3.19.0-16 in
  order to be able to use my touchpad normally.

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