Tapping problems with KDE 4.7.2, openSUSE 12.1

As I mentioned in a thread about problems with reboot, my laptop is relatively old (2008) Acer 5520G with video Mobility Radeon HD 2400 XT on board. Earlier I used OS 11.4. I’ve made upgrade to 12.1. (I also tried to set up 12.1 from disk with formatting /. The result was nearly the same as after upgrading from 11.4).

I have a problem with touchpad. Tapping is disabled. When I save settings it taps ok. After reboot there are two possible scenarios. 1) Touchpad tapping is disabled some minutes after login (hard drive activity is high after login for some reasons and almost freezes my laptop in 12.1), then touchpad tapping works. 2) Touchpad tapping stays disabled. I go to KDE settings and see tapping disabled, change this and voila - it works again… either until the next reboot, or not. I cannot reproduce this every time.

Is
Option “TapButton1” “1”
set in synaptics.conf?

It was not set. I added this line and it works. Thank you.
Will this option be destroyed after update as noted in synaptics.conf?

Only when you install 12.2 - I just keep a copy in my /home folder and add it after a fresh install.