Cannot configure Synaptics touchpad - Requires SHMConfig

["Eduardo M KALINOWSKI" <eduardo@kalinowski.com.br>]

    I'm trying to use gsynaptics to configure the touchpad in an Acer  
6292 laptop. However, it says it needs the SHMConfig option to be  
enabled. There are problems also with synclient, for example:

# synclient -h
Can't access shared memory area. SHMConfig disabled?

However, I did enable that option. Here's my full xorg.conf file:

--------
# xorg.conf (X.Org X Window System server configuration file)
#
# This file was generated by dexconf, the Debian X Configuration tool, using
# values from the debconf database.
#
# Edit this file with caution, and see the xorg.conf manual page.
# (Type "man xorg.conf" at the shell prompt.)
#
# This file is automatically updated on xserver-xorg package upgrades *only*
# if it has not been modified since the last upgrade of the xserver-xorg
# package.
#
# If you have edited this file but would like it to be automatically updated
# again, run the following command:
#   sudo dpkg-reconfigure -phigh xserver-xorg

Section "InputDevice"
        Identifier      "Generic Keyboard"
        Driver          "kbd"
        Option          "XkbRules"      "xorg"
        Option          "XkbModel"      "abnt2"
        Option          "XkbLayout"     "br"
        Option          "XkbVariant"    "abnt2"
EndSection

#Section "InputDevice"
#       Identifier      "Configured Mouse"
#       Driver          "mouse"
#EndSection

Section "InputDevice"
        Identifier      "Synaptics Touchpad"
        Driver          "synaptics"
        Option          "SendCoreEvents"        "true"
        Option          "Device"                "/dev/psaux"
        Option          "Protocol"              "auto-dev"
        Option          "HorizScrollDelta"      "0"
        Option          "SHMConfig"             "on"
EndSection

Section "Device"
        Identifier      "Configured Video Device"
EndSection

Section "Monitor"
        Identifier      "Configured Monitor"
EndSection

Section "Screen"
        Identifier      "Default Screen"
        Monitor         "Configured Monitor"
EndSection
----------

I've also created a file /etc/hal/fdi/policy/shmconfig.fdi, following  
instructions I fould somewhere in the net with these contents:

-----------
<?xml version="1.0" encoding="ISO-8859-1"?>
<deviceinfo version="0.2">
 <device>
  <match key="input.x11_driver" string="synaptics">
   <merge key="input.x11_options.SHMConfig" type="string">on</merge>
  </match>
 </device>
-----------

However, even after several reboots, I still cannot run the programs  
to configure the touchpad.

My kernel is
Linux vingilot 2.6.26-1-686 #1 SMP Thu Oct 9 15:18:09 UTC 2008 i686 GNU/Linux
and my xserver-xorg-input-synaptics package is 0.14.7~git20070706-3.

--
Eduardo M KALINOWSKI
eduardo@kalinowski.com.br