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[Andrei Vainik <1272624@xxxxxxxxxxxxxxxxxx>]

Same problem on my E7400. When holding finger down, cursor starts jumping back and forth from finger location to some random location and does random clicks. Very annoying. 
Updating to latest BIOS A11, did not help.

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https://bugs.launchpad.net/bugs/1272624

Title:
  [Dell Latitude E7440] 14.04 Touchpad causing mouse pointer to
  spuriously jump around screen

Status in linux package in Ubuntu:
  Triaged

Bug description:
  From the live usb the touchpad seems less jerky compared to ubuntu
  13.10 but is still not as smooth as Windows 7.

  This may be due to how the touchpad is detected as a PS/2 mouse instead of a more appropriate touchpad driver:
  https://launchpadlibrarian.net/163664336/BootDmesg.txt
  [    4.088881] mousedev: PS/2 mouse device common for all mice

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-5-generic 3.13.0-5.20
  ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0
  Uname: Linux 3.13.0-5-generic x86_64
  ApportVersion: 2.13.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubuntu     4246 F.... pulseaudio
   /dev/snd/controlC1:  ubuntu     4246 F.... pulseaudio
  CasperVersion: 1.336ubuntu1
  CurrentDesktop: Unity
  Date: Sat Jan 25 06:50:44 2014
  LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140124)
  MachineType: Dell Inc. Latitude E7440
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash --
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-5-generic N/A
   linux-backports-modules-3.13.0-5-generic  N/A
   linux-firmware                            1.122
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/02/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A07
  dmi.board.name: 0PPXP5
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA07:bd01/02/2014:svnDellInc.:pnLatitudeE7440:pvr01:rvnDellInc.:rn0PPXP5:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E7440
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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