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[Samuli Kauranne <samuli.kauranne@xxxxxxxxx>]

Public bug reported:

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.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

** Summary changed:

- Touchpad tap-event support broken since kernel 3.19.0-26
+ Touchpad tap-event support broken since kernel 3.19.0-25

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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:
  New

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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