Public bug reported:

I am using the very latest BIOS A15, with Ubuntu 14.04 LTS and the
latest kernel for this is 3.16.0-45-generic #60~14.04.1-Ubuntu

This is a kernel that has these recent ALPS related patches :
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1258837

So after a reboot the touchpad and button work fine, at start.

After a while the buttons, a single tap click , a double tap-click and
the dual finger scrolling stop working on the correct front-most window
and work instead on a background window.

If I Alt-tab to bring the window that receives the touchpad events to
front, it receives it ok,  so this one window gets mouse events. Using
either the touchpad or the glidepoint is then limited to this window at
this point.

Going to a terminal with ctrl-alt-f1 just a few seconds and then back to
ctrl-alt-f7 restores things to normal for a while.

Until its starts again.

No dmesg nor syslog show up so this may be an X issue instead. or this
is a kernel issue. Not sure.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-45-generic 3.16.0-45.60~14.04.1
ProcVersionSignature: Ubuntu 3.16.0-45.60~14.04.1-generic 3.16.7-ckt14
Uname: Linux 3.16.0-45-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.11
Architecture: amd64
CurrentDesktop: Unity
Date: Sun Aug  2 00:08:53 2015
InstallationDate: Installed on 2015-05-16 (77 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: linux-lts-utopic (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1480615

Title:
  [Dell Latitude E6540] ALPS touchpad and buttons work only in a single
  window.

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