I found this:
and this> What is "input device 169"?
Good question. I think it has to do with some unnecessary touchpad sections
sitting there in xorg.conf. At least, removing them got rid of the error
message.
Some buffer somewhere is not handled correctly (this can be or not be hardware related) so commands are sent twice, so it could be that two sets of commands are sent and not one when you click...I've commented out the entries [leading to success]
InputDevice "stylus" "SendCoreEvents"
InputDevice "cursor" "SendCoreEvents"
InputDevice "eraser" "SendCoreEvents"
So comment out the InputDevices mentioned above. They are in /etc/X11/xorg.conf
so you have to do "sudo cp /etc/X11/xorg.conf /etc/X11/xorg.bak" to backup xorg.conf and then
kdesu your favorite editor to change xorg.conf
(comment out = put # first in the line)
Give it a try and report back - unfortunately it is hard to find any useful info on this.