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[Kalle Elmér <606238@xxxxxxxxxxxxxxxxxx>]

I'm using the psmouse driver on a Dell Inspiron 17R SE and it makes the touchpad work as an actual touchpad and not just a mouse. However, I'm experiencing a significant amount of backlash. By this, I mean that when reversing the direction of movement the cursor will remain still for some time before it actually moves again. The behavior is very similar to the mechanical concept of backlash, which is nicely explained in this Wikipedia article:
http://en.wikipedia.org/wiki/Backlash_%28engineering%29

Could this be a flaw in the driver or in some other part of the software
system? Is it just a property of my hardware? I have noticed the exact
same behavior on a Fujitsu Lifebook with an ALPS touchpad that also
works with this driver.

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https://bugs.launchpad.net/bugs/606238

Title:
  synaptic touchpad not recognized on dell latitude e6510

Status in The Linux Kernel:
  Fix Released
Status in “linux” package in Ubuntu:
  Incomplete
Status in “linux” source package in Precise:
  Fix Released
Status in “linux” source package in Quantal:
  Fix Committed
Status in “linux” package in Arch Linux:
  Fix Released
Status in openSUSE:
  New

Bug description:
  It wrongly recognized as PS/2 Generic Mouse. And then scrolling does
  not work, but tapping does.

  ProblemType: Bug
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 2/2
     Subdevice #0: subdevice #0
     Subdevice #1: subdevice #1
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  karol      2618 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xe9660000 irq 22'
     Mixer name	: 'IDT 92HD81B1C5'
     Components	: 'HDA:111d76d5,1028040b,00100104'
     Controls      : 26
     Simple ctrls  : 16
  Date: Fri Jul 16 13:36:04 2010
  DistroRelease: Ubuntu 9.10
  HibernationDevice: RESUME=UUID=cdf10c13-029f-401b-afed-f651ca0e2cbe
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.2)
  MachineType: Dell Inc. Latitude E6510
  NonfreeKernelModules: nvidia
  Package: linux-image-2.6.31-22-generic-pae 2.6.31-22.60
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-22-generic-pae root=UUID=2f511d08-c4e9-44e6-a1d2-5be6172b18c6 ro quiet splash
  ProcEnviron:
   PATH=(custom, user)
   LANG=pl_PL.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.31-22.60-generic-pae
  RelatedPackageVersions:
   linux-backports-modules-2.6.31-22-generic-pae 2.6.31-22.24
   linux-firmware 1.26
  SourcePackage: linux
  Uname: Linux 2.6.31-22-generic-pae i686
  dmi.bios.date: 05/28/2010
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A03
  dmi.board.name: 0N5KHN
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA03:bd05/28/2010:svnDellInc.:pnLatitudeE6510:pvr0001:rvnDellInc.:rn0N5KHN:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6510
  dmi.product.version: 0001
  dmi.sys.vendor: Dell Inc.

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