The bug continues after kernel upgrade. Perhaps in lesser frequency.

Just now, after some OKULAR work, the pointer got stuck. Closing the lid
(that puts the computer into suspend mode) and then opening again
repairs the pointer motion.

Does that indicate that some buffer needs to be cleared, or some loop
must stop looping?

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https://bugs.launchpad.net/bugs/1675390

Title:
  touchpad stops responding erratically

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  Hardware: Dell XPW 13 2016 model no. 9360
  Touchpad  DLL075B:01 06CB:76AF Touchpad  
  OS KUBUNTU 

  Description:

  - The tochpad works ok for a while, then after some time it stops responding 
to finger input.     
  - There seems to be a correlation bwetween the touchpad failure and a running 
a heavy program, like LIBREOFFICE. 
  - Plugging in an extenral mouse is a solution (of sorts). 
  - After a while the touchapd resumea normal activity.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.10
  Package: xinput 1.6.2-1
  ProcVersionSignature: Ubuntu 4.8.0-41.44-generic 4.8.17
  Uname: Linux 4.8.0-41-generic x86_64
  ApportVersion: 2.20.3-0ubuntu8.2
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Thu Mar 23 14:28:24 2017
  InstallationDate: Installed on 2016-12-09 (104 days ago)
  InstallationMedia: Kubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.1)
  SourcePackage: xinput
  UpgradeStatus: No upgrade log present (probably fresh install)

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