I solved the problem on my Fujitsu-Siemens Lifebook E8010 with Kubuntu,
Gutsy, kernel 2.6.22-14-386. It was not a kernel problem. Here is my
howto. I hope it works for others as well:

Not only the touchpad works properly with scrolling and tapping,
including two-finger-tapping, also the scroll buttons works.

First, I found out that I had a synaptics touchpad, and not an Alps touchpad:
cat /proc/bus/input/devices

You may also check that you have the xorg driver:
apt-get install  xserver-xorg-input-synaptics 

Now, this is crucial: In the Section "Serverlayout" of
/etc/X11/xorg.conf, the Touchpad InputDevice must be ABOVE the mouse
InputDevice. Else, the mousedriver will be used. In that case, when you
use ksynaptics, etc. you will get a message telling that you have to
turn "SHMConfig" "on" although you apparently have done it.

Section "ServerLayout"
  Identifier "Default Layout"
  screen 0 "Default Screen" 0 0
  InputDevice "Touchpad"                   #This line first
  InputDevice "Configured Mouse"           #Then this line
  InputDevice "stylus" "SendCoreEvents"
  InputDevice "cursor" "SendCoreEvents"
  InputDevice "eraser" "SendCoreEvents"
EndSection

My InputDevice section for the Touchpad is:

Section "InputDevice"
  Identifier "Touchpad"
  Driver "synaptics"
  option "SendCoreEvents" "true"
  option "Device" "/dev/psaux"
  option "Protocol" "auto-dev"
  option "HorizScrollDelta" "0"
  option "SHMConfig" "on"
  option "MaxTapTime" "180"
  Option "ZAxisMapping"          "4 5 6 7"
  Option "Buttons"               "9"
EndSection

(I am not sure of the exact values of two last lines. But, it works.)

"SHMConfig on" means that you can configure the touchpad with
qsynaptics, ksynaptics or gsynaptics. Alternatively, you must configure
your touchpad with SHMConfig off and all the relatvant variables in
xorg.conf. You will easily find examples on the net. Please notice, that
if MaxTapTime is set to 0, tapping does not work (though you may
TEMPORARILY overrule the switching off of tapping with ksynaptics,
etc.).

Link:
http://web.telia.com/~u89404340/touchpad/

-- 
Touchpad recognized as generic mouse on Thinkpad R61 laptop
https://bugs.launchpad.net/bugs/163141
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