Public bug reported:

I'm using Ubuntu Gutsy Gibbon on a Compaq nx8220 laptop.

The problem here is that the touchpad generates data on both /dev/psaux
and /dev/input/mice. Both devices get respective secions in
/etc/X11/xorg.conf.

Now if I want to disable the touchpad ("synclient TouchpadOff=1" in
order to use USB mouse only) or set any other options using synclient,
there's no effect since /dev/input/mice traffic originating from the
touchpad isn't affected at all, only /dev/psaux.

I could use /dev/input/mouseX instead of /dev/input/mice, but this only works 
for USB mice that are present during X server startup.
If I hot-plug them, it results in creating new device nodes that the X server 
doesn't have opened and USB mice don't work.

So I cannot reconfigure or disable the touchpad while retaining the
possibility to use hot-plugged USB mice.

** Affects: xserver-xorg-input-synaptics (Ubuntu)
     Importance: Undecided
         Status: New

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/dev/input/mice duplicates synaptics communication and makes configuring 
synaptics impossible
https://bugs.launchpad.net/bugs/180374
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