The problem has been fixed by Nathan Hamblen, who wrote a patch which enables the user to set a factor that changes the sensitivity on y-axis. It's easy to use: this factor (default to 1, ie the sensitivity is not changed) is a number which is multiplied with the value of sensitivity on y-axis. For example, if you set it to 2, the sensitivity will be twice the original one.
After some tests, I ended up with a value of 0.6 for my touchpad, ie almost half the sensitivity.
Here you can find more informations about the patch.
VERY IMPORTANT NOTE:
If you use this patch for fixing the touchpad sensitivity, DO NOT ADD ANYTHING in '/etc/X11/xorg.conf' or else there will be conflicts with settings.
Because I had to rebuild the xserver-xorg-input-synaptics package on my ubuntu to apply the patch, I decided to use the latest sources taken directly from jaunty, the next to-be-released Ubuntu. Furthermore, I set up the factor value to 0.6 directly in the package, so all you have to do is to install it.
If for any reason you want to change that value, just edit as admin the file /usr/share/hal/fdi/policy/20thirdparty/11-x11-synaptics.fdi and change the line
Code: Select all
<merge key="input.x11_options.VertAdjustmentFactor" type="string">0.6</merge>
You can download the package from my repository.
As usual, for any problem or information just post here.