Public bug reported:

After starting the laptop the touchpad works for about 20-30 seconds
after login. Am only able to utilize external USB mouse for functional
control over the pointer. This is a fresh install (not upgrade) to the
new LTS 16.04, Touchpad was working correctly with the last LTS 14.04.
Unloading and reloading the mouse does nothing.

$ lsb_release -rd
Release:        16.04

$ apt-cache policy synaptic 
synaptic:
  Installed: 0.83
  Candidate: 0.83
  Version table:
 *** 0.83 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        100 /var/lib/dpkg/status

I created scripts to dump all relevant data while the touchpad was
working as well as after it stopped working. Below are the scripts I
ran, I have attached their outputs.

#!/bin/bash
cat /proc/bus/input/devices > ~/devices
dmesg > ~/dmesg_boot
cp /var/log/Xorg.0.log ~/Xorg.0.log

#!/bin/bash
LANG=C
dmesg > ~/dmesg
diff -ns ~/dmesg_boot ~/dmesg > ~/dmesg_diff
cp /var/log/Xorg.0.log ~/Xorg.0.log_tmp
diff -ns ~/Xorg.0.log ~/Xorg.0.log_tmp > ~/Xorg.0.log_diff

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xorg 1:7.7+13ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
BootLog:
 
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Wed Jun  8 05:46:49 2016
DistUpgraded: Fresh install
DistroCodename: xenial
DistroVariant: ubuntu
DkmsStatus: virtualbox-guest, 5.0.18, 4.4.0-22-generic, x86_64: installed 
(WARNING! Diff between built and installed module!) (WARNING! Diff between 
built and installed module!) (WARNING! Diff between built and installed module!)
ExtraDebuggingInterest: Yes
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Carrizo [1002:9874] (rev c5) (prog-if 
00 [VGA controller])
   Subsystem: Dell Carrizo [1028:06bd]
InstallationDate: Installed on 2016-06-08 (0 days ago)
InstallationMedia: Linux Lite 3.0 - Release amd64
MachineType: Dell Inc. Inspiron 5555
ProcEnviron:
 LANGUAGE=en_US
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-22-generic 
root=UUID=cdee5904-960c-4b97-91bb-66e57752f697 ro i8042.noloop quiet splash 
vt.handoff=7
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/27/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 0CHHXW
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: A08
dmi.modalias: 
dmi:bvnDellInc.:bvrA08:bd08/27/2015:svnDellInc.:pnInspiron5555:pvrA08:rvnDellInc.:rn0CHHXW:rvrA00:cvnDellInc.:ct8:cvrA08:
dmi.product.name: Inspiron 5555
dmi.product.version: A08
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.12.2+16.04.20160526-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.67-1ubuntu0.16.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 11.2.0-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 11.2.0-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.18.3-1ubuntu2.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.1-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.7.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20160325-1ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.12-1build2

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


** Tags: amd64 apport-bug ubuntu xenial

** Attachment added: "Script-Output"
   
https://bugs.launchpad.net/bugs/1590393/+attachment/4679770/+files/Script-Output

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https://bugs.launchpad.net/bugs/1590393

Title:
  Synaptics touchpad discontinues function after login

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