Adjusting mouse speed has no effect on Touchpad

Ditto on a Dell 1420n, using Gutsy--adjusting the acceleration (or sensitivity) via system->preferences->mouse has no apparent affect; as a workaround I use

synclient AccelFactor=0.015

(0.015 is right for me; default on my machine, reported by syclient -l, is 0.0065189.)

I can confirm this. This still happens in Gutsy. If I have a usb mouse connected and change the mouse speed settings it has effect on it but not the Touchpad.
Since Alps Touchpad is very slow per default with Xorg I always add these lines to Section "Synaptics Touchpad" in /etc/X11/xorg.conf:
        Option "HorizScrollDelta" "0"
        Option "MinSpeed" "0.60"
        Option "MaxSpeed" "1.10"
        Option "AccelFactor" "0.030"

I am using Sony Vaio VGN-TX2 Laptop.

The primary reason for this of course is, that without having set the "SHMConfig" Option to "on" in the touchpad section in xorg.conf, it is impossible to dynamically change any touchpad settings. The "SHMConfig" by default is not set in Ubuntu nor in any other distro AFAIK.

I believe it was a comment from Xorg that stated, that this is due to security reasons. However, I do not fully understand, why it is no security threat to dynamically change mouse settings but it is a threat to change touchpad settings.

It is indispensable to allow users to change their touchpad settings dynamically. It is also indispensable to include functionality in Ubuntu to temporarily disable touchpad tapping when typing on the keyboard.

As non of this can be accomplished without the SHMConfig option, I suggest to get upstream involved to discuss the quoted security issues.

This issue seems to be fixed in current Hardy. Feel free to open it again if it still happens with latest Hardy.