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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1382702

Title:
  Latitude e7440 Touchpad out of sync

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  The touchpad repetitively gets out of sync, causing the mouse to jump
  around and randomly click things:

  [  399.788431] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 lost sync at byte 6
  [  399.798582] psmouse serio1: DualPoint TouchPad at isa0060/serio1/input0 - driver resynced.

  Loading the psmouse driver with proto=exps largely avoids the problem,
  but has the side effect of merging the trackpad and the nub together
  as one input device (so you can't disable the trackpad and just use
  the nub).

  Setting resetafter on the driver does fix the random moving and
  clicking, but causes the CPU to thrash as it constantly disconnects
  and reconnects to try to "resync."

  I'm running dell BIOS A10 for this system, in UEFI mode.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-37-generic 3.13.0-37.64
  ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
  Uname: Linux 3.13.0-37-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  taylocj1   2947 F.... pulseaudio
   /dev/snd/controlC0:  taylocj1   2947 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri Oct 17 18:50:28 2014
  HibernationDevice: RESUME=UUID=f364f93e-bbb2-4f84-aa9c-6ae3a0f6b182
  InstallationDate: Installed on 2014-10-03 (14 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  MachineType: Dell Inc. Latitude E7440
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-37-generic root=UUID=d5a9e110-1f9c-446f-84b8-e57ddf7afca6 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-37-generic N/A
   linux-backports-modules-3.13.0-37-generic  N/A
   linux-firmware                             1.127.7
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 06/26/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A10
  dmi.board.name: 07F3F4
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA10:bd06/26/2014:svnDellInc.:pnLatitudeE7440:pvr01:rvnDellInc.:rn07F3F4:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E7440
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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