Forwarding this bug from Ubuntu reporter Stefan Ebner:
  https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/795920

[Problem]
The touchpad surface includes a hot area to enable/disable it, but it does not work in linux.  Perhaps support needs added for it?

[Original Description]
My laptop doesn't have an extra button for disabling/enabling the touchpad.
On the top left corner of the touchpad there is an small area (marked with a white dot) where you have to tap 2 times to disable/enable it. If disabled it shows a orange light.

This doesn't work under ubuntu, also not under oneiric with all updates installed.

[    9.615958] Synaptics Touchpad, model: 1, fw: 7.4, id: 0x1e0b1, caps: 0xd04773/0xe40000/0x5a0400
[    9.705035] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio1/input/input10

DistroRelease: Ubuntu 11.10
Package: xserver-xorg-input-synaptics 1.3.99+git20110116.0e27ce3a-0ubuntu15
ProcVersionSignature: Ubuntu 2.6.39-3.10-generic 2.6.39
Uname: Linux 2.6.39-3-generic i686
NonfreeKernelModules: wl
Architecture: i386
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
Date: Sat Jun 11 14:52:23 2011
DistUpgraded: Log time: 2011-06-04 16:54:22.107183
DistroCodename: oneiric
DistroVariant: ubuntu
GraphicsCard:
 Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:163c]
 ATI Technologies Inc Madison [AMD Radeon HD 5000M Series] [1002:68c1] (prog-if 00 [VGA controller])
   Subsystem: Hewlett-Packard Company Device [103c:163c]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
MachineType: Hewlett-Packard HP Pavilion dv6 Notebook PC
ProcEnviron:
 LANGUAGE=en_GB:en
 LANG=en_GB.UTF-8ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.39-3-generic root=UUID=AA18AE5218AE1CF7 loop=/hostname/disks/root.disk ro single
Renderer: Unknown
SourcePackage: xserver-xorg-input-synaptics
UpgradeStatus: Upgraded to oneiric on 2011-06-04 (6 days ago)
dmi.bios.date: 10/21/2010
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.23
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 163C
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 65.35
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.23:bd10/21/2010:svnHewlett-Packard:pnHPPaviliondv6NotebookPC:pvr0580120015243D10010020100:rvnHewlett-Packard:rn163C:rvr65.35:cvnHewlett-Packard:ct10:cvrN/A:
dmi.product.name: HP Pavilion dv6 Notebook PC
dmi.product.version: 0580120015243D10010020100
dmi.sys.vendor: Hewlett-Packard
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu3
version.libdrm2: libdrm2 2.4.25-2ubuntu2
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.0-3ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1