Hotkey Fn-F9 doesn't turn touchpad off

[Paolo]

I've just installed Intrepid on my Daru1, and Fn-F9 doesn't switch the touchpad off anymore. This is not a surprise: it happened after any upgrade, and it was fixed by adding a line to the touchpad entry of xorg.conf. But now xorg.conf is almost empty, and in particular there is no touchpad entry.

 Fn-F9 does not return any keycode (tested with xev), but returns the ACPI event:

hotkey ATKD 0000006b 0000001f

and so on: it adds 1 every time I press it (tested with acpi_listen).

[Thomas Aaron (writer-programmer)]

xorg.conf no longer has an entry for the DarU1's synaptic touchpad.
In previous versions of Ubuntu, one would add...
"SHMConfig" "true"
...to the xorg.conf.

Now this is done by modifying this file...
/usr/share/hal/fdi/policy/20thirdparty/11-x11-synaptics.fdi

...by adding this line...
<merge key="input.x11_options.SHMConfig" type="string">On</merge>

...to the section that starts with...
<match key="info.product" contains="Synaptics TouchPad">

More complete instructions are here...
http://ubuntuforums.org/showpost.php?p=6077309&postcount=121

This fix will be added to the System76 Driver.

[Thomas Aaron (tom-system76)]

Download the attached script to your desktop.
Open a terminal and run these commands to make the script executable...

cd Desktop
sudo chmod a+x DarU1_Fn-F9_Fix.py

Then double-click the script and select Run.

Now reboot your computer, and the Fn-F9 key should enable and disable your touchpad.

[Thomas Aaron (tom-system76)]

The above script will be inserted into the next System76 Driver.

[Paolo (paolo1438)]

Actually your instructions from 11/20 already fixed the problem, thank you

[Paolo (paolo1438)]

I have installed Jaunty, and the Fn-F9 stop working again. Installing the driver did not solve the problem, but followoing Thomas's instructions in this thread did.

Paolo