Same problem on my Lenovo 3000-V200 laptop (i386). $ dpkg -l | grep xserver-xorg-input-synaptics ii xserver-xorg-input-synaptics 1.1.2-1 As workaround, after load KDE4 I need run "gsynaptics" and enable tap, so it works. If I restart the laptop, "tap config" is disabled.