The problem (and the solution) that I bring you next comes from our forum, where the user mok, after updating your Debian KDE, began to have problems with the touchpad, which lost the configuration it had previously.
The solution to your problem was offered by the user josbergutiara which told him the following:
I have Debian Testing KDE (64-bit) with the Kernel 3.10 and to always configure the Touchpad I just edit the following file:
nano /etc/rc.local
And just before the line exit 0 you must add the code provided by the wiki at index 7.
It is just adding the following code just before exit 0
rmmod psmouse modprobe psmouse proto = imps
They save the file and it only remains to restart the PC. With this you should already have the touchpad working correctly.
Other solution
The previous solution solved (worth the redundancy) our friend's problem. Anyway, if someone comes across the same situation, you can do as stated on the Debian Wiki:
If you're using a generic touchpad, but it's not working as it should, you can run the following commands to get it working right away:
modprobe-r psmouse modprobe psmouse proto = imps
To make this change permanent, create a file called touchpad.conf en /etc/modprobe.d/, and puts the following line in it:
options psmouse proto=imps
No need to install gsynaptics, synaptic, tpconfig or edit the file xorg.conf. All you need is to pass the kernel options to the psmouse module.
Source: Debian Wiki