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[Tomek <1015496@xxxxxxxxxxxxxxxxxx>]

It didn't help.

However, I've looked a bit deeper into this and found out that I
actually can check whether X receives any events from this combination
of keys (Fn+F3). And it does. X not only receives the key press event,
but also the key release event (without the changes suggested in the
previous post). X even knows what this event is for - it knows that it
is a "touchpad toggle" event. However, the touchpad isn't being
disabled.

I used xev command for this, and below is the output I get when pressing
(and releasing) the Fn+F3 combination.


KeyPress event, serial 40, synthetic NO, window 0x6200001,
    root 0xbb, subw 0x0, time 208513, (44,123), root:(1230,652),
    state 0x0, keycode 199 (keysym 0x1008ffa9, XF86TouchpadToggle), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 40, synthetic NO, window 0x6200001,
    root 0xbb, subw 0x0, time 208677, (44,123), root:(1230,652),
    state 0x0, keycode 199 (keysym 0x1008ffa9, XF86TouchpadToggle), same_screen YES,
    XLookupString gives 0 bytes: 
    XFilterEvent returns: False


At the moment I'm using the latest version of Kubuntu - 13.04.

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https://bugs.launchpad.net/bugs/1015496

Title:
  Disable-touchpad key does not work on Dell Vostro V3450

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Hello,

  The problem is that the 'disable touchpad' function key does not work
  in Ubuntu for Dell Vostro V3450 (please note the V before the number -
  as far as I know, the Vostro without V before the number is another
  model from Dell).

  I've noticed this already in the previous Ubuntu release (11.10) but
  thought it'll be fixed by now. After upgrade to 12.04 nothing has
  changed. I've, of course, searched for similar bugs on launchpad, but
  I believe they are not the same issues as mine. The problem is similar
  to bug #753641, but that one has been marked as a duplicate of already
  resolved bug #550625 and my issue is not resolved. Also bug #760142 is
  similar, but I don't think my touchpad uses the ALPS driver.

  On my V3450 the 'disable touchpad' key is Fn+F3 combination. Pressing
  the combination doesn't disable the touchpad in Ubuntu. It also
  doesn't display any pop-up on the screen (as photonic wrote in a
  comment to bug #753641, in his case "a notification pops up displaying
  graphic of a crossed-out touchpad" - it doesn't happen on my system).

  However, I'm sure that the laptop's hardware does inform the system
  when the combination has been pressed - in my laptop I have an orange
  led placed between the touchpad and the keyboard. When I press Fn+F3
  the LED turns on, suggesting that the touchpad is disabled. When I
  press Fn+F3 again, the LED is being turned off.

  Another hint - after I bought the laptop I've installed Debian
  wheezy/testing on it and there the Fn+F3 combination worked as
  expected.

  Output of cat /proc/bus/input/devices:
  I: Bus=0011 Vendor=0002 Product=0007 Version=01b1
  N: Name="SynPS/2 Synaptics TouchPad"
  P: Phys=isa0060/serio1/input0
  S: Sysfs=/devices/platform/i8042/serio1/input/input13
  U: Uniq=
  H: Handlers=mouse1 event13 
  B: PROP=9
  B: EV=b
  B: KEY=6420 30000 0 0 0 0
  B: ABS=260800011000003

  Output of uname -a:
  Linux tom-laptop 3.2.0-25-generic #40-Ubuntu SMP Wed May 23 20:30:51 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
  --- 
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu8
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: ALC269VB Analog [ALC269VB Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  tom        2013 F.... pulseaudio
  CRDA: Error: [Errno 2] Nie ma takiego pliku ani katalogu
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xe1800000 irq 52'
     Mixer name	: 'Intel CougarPoint HDMI'
     Components	: 'HDA:10ec0269,102804c5,00100100 HDA:80862805,80860101,00100000'
     Controls      : 25
     Simple ctrls  : 12
  DistroRelease: Ubuntu 12.04
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=b29344c3-b915-4f93-8646-031588b5eaa6
  InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  MachineType: Dell Inc. Dell System Vostro 3450
  Package: linux (not installed)
  ProcEnviron:
   LANGUAGE=
   TERM=xterm
   LANG=pl_PL.UTF-8
   SHELL=/bin/bash
  ProcFB:
   0 radeondrmfb
   1 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-25-generic root=UUID=b7cbf6aa-c56a-42dd-9aae-ae8ad594d1d1 ro quiet splash vt.handoff=7
  ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-25-generic N/A
   linux-backports-modules-3.2.0-25-generic  N/A
   linux-firmware                            1.79
  SourcePackage: linux
  StagingDrivers: mei
  Tags:  precise staging precise staging
  Uname: Linux 3.2.0-25-generic x86_64
  UpgradeStatus: Upgraded to precise on 2012-04-28 (53 days ago)
  UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare
  dmi.bios.date: 03/25/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A04
  dmi.board.name: 0K8WHD
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA04:bd03/25/2011:svnDellInc.:pnDellSystemVostro3450:pvr:rvnDellInc.:rn0K8WHD:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: Dell System Vostro 3450
  dmi.sys.vendor: Dell Inc.

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