Public bug reported:

When using normally the touchpad, sometimes it jumps to (mostly) the
bottom of the screen. It jumps to any position in the bottom, not the
corners.

Also, sometimes it jumps to the top. This is not random jumping, or
erratic movement. It jumps to the bottom on some touchs.

I found that it's quite reproducible if you play a little with two
fingers on the pad, not moving the pointer but just touching the pad
with one finger, then with the other, then with the first, etc, in rapid
succession.

I'm happy to help with any debugging.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-34-generic 4.4.0-34.53
ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
Uname: Linux 4.4.0-34-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  facundo    3451 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Aug 17 17:55:42 2016
HibernationDevice: RESUME=UUID=340cc03c-dbf5-43e8-9df1-54c80503a2bf
InstallationDate: Installed on 2016-07-29 (18 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 5986:0706 Acer, Inc 
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: LENOVO 20F9CTO1WW
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-34-generic.efi.signed 
root=UUID=c1ae597a-f554-417b-872a-ac0cf8710fe7 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-34-generic N/A
 linux-backports-modules-4.4.0-34-generic  N/A
 linux-firmware                            1.157.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/14/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: N1CET43W (1.11 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20F9CTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40700 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: 
dmi:bvnLENOVO:bvrN1CET43W(1.11):bd04/14/2016:svnLENOVO:pn20F9CTO1WW:pvrThinkPadT460s:rvnLENOVO:rn20F9CTO1WW:rvrSDK0J40700WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.name: 20F9CTO1WW
dmi.product.version: ThinkPad T460s
dmi.sys.vendor: LENOVO

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


** Tags: amd64 apport-bug xenial

-- 
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https://bugs.launchpad.net/bugs/1614265

Title:
  Mouse pointer shows to the bottom on the screen on some pad touchs

Status in linux package in Ubuntu:
  New

Bug description:
  When using normally the touchpad, sometimes it jumps to (mostly) the
  bottom of the screen. It jumps to any position in the bottom, not the
  corners.

  Also, sometimes it jumps to the top. This is not random jumping, or
  erratic movement. It jumps to the bottom on some touchs.

  I found that it's quite reproducible if you play a little with two
  fingers on the pad, not moving the pointer but just touching the pad
  with one finger, then with the other, then with the first, etc, in
  rapid succession.

  I'm happy to help with any debugging.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: linux-image-4.4.0-34-generic 4.4.0-34.53
  ProcVersionSignature: Ubuntu 4.4.0-34.53-generic 4.4.15
  Uname: Linux 4.4.0-34-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  facundo    3451 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Aug 17 17:55:42 2016
  HibernationDevice: RESUME=UUID=340cc03c-dbf5-43e8-9df1-54c80503a2bf
  InstallationDate: Installed on 2016-07-29 (18 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 
(20160719)
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 003: ID 5986:0706 Acer, Inc 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: LENOVO 20F9CTO1WW
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-34-generic.efi.signed 
root=UUID=c1ae597a-f554-417b-872a-ac0cf8710fe7 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.4.0-34-generic N/A
   linux-backports-modules-4.4.0-34-generic  N/A
   linux-firmware                            1.157.3
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/14/2016
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N1CET43W (1.11 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20F9CTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0J40700 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: 
dmi:bvnLENOVO:bvrN1CET43W(1.11):bd04/14/2016:svnLENOVO:pn20F9CTO1WW:pvrThinkPadT460s:rvnLENOVO:rn20F9CTO1WW:rvrSDK0J40700WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20F9CTO1WW
  dmi.product.version: ThinkPad T460s
  dmi.sys.vendor: LENOVO

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