Hi,this happend to me few times. When I apt-get upgrade, it makes me to reconfigure my mouse. Whatever I did it always turned wrong. Mouse get out of controll in Login menu. I ran xf86config and now I am able to use the mouse, but tim to time it goes wild and clicks whereever it wants.
Please help !!! It's Genius Netscroll + PS2 and my XF86config-4: Option "Device" "/dev/psaux" Option "ZAxisMapping" "4 5" Thanks Petr Simon