I'm running SuSE 9 pro. on an Acer TravelMate 240, which mostly seems to work well. I haven't, however, been able to get any life out of the scroll-button under the touchpad. Under YaST, the mouse model is set to PS/2 Mouse (Aux port), which is the only option which makes the touchpad work at all.

Is there any way of making to scroll-button work correctly? I would guess that I would have to download and install a driver for a PS/2 mouse with scroll-button, but I've got no idea where to look for such a driver.

you need to edit the xf86config file. Follow these steps:

1. vi /etc/X11/xf86config
2. Browse down to the section

Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "PS/2"
Option "Device" "/dev/input/mice"
Option "Emulate3Buttons" "no"
EndSection

3. Press the key 'a'. You will see --INSERT-- appear at the bottom left of the scree.
4. Change PS/2 to IMPS/2
4. Also add another line
Option "ZAxisMapping" "4 5"
5. press escape(esc)
6. Press colon ( : ) and then write 'wq'
:wq

This saves and exits the file and you are all set.

Your mouse section should now look like
Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "IMPS/2"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "no"
EndSection

Hope this helps.