[ltp] X22 & Scrollpoint in X-4.2.1 with gpm as repeater ?

[linux-thinkpad@linux-thinkpad.org]

My X22 woody setup has

- gpm as repeater with parameters psaux, msc, fups, 

- the IBM SCROLLPOINT mouse 
  ( quite a particular mouse which \not= scollwheel )
  as USB mouse MouseManPlus/PS2

- the relevant parts of XF86Config-4 :

    Section "InputDevice"
            Identifier      "Track Point"
            Driver          "mouse"
            Option          "Device"            "/dev/gpmdata"
            Option          "Protocol"          "MouseSystems"
    EndSection

    Section "InputDevice"
            Identifier      "USB Mouse"
            Driver          "mouse"
            Option          "Device"            "/dev/input/mice"
            Option          "Protocol"          "MouseManPlusPS/2"
    #       Option          "Buttons"           "?"
    #       Option          "ZAxisMapping"      "?"
    EndSection

    Section "ServerLayout"
            ...
            InputDevice "Track Point" "CorePointer"
            InputDevice "USB Mouse"   "SendCoreEvents" "AlwaysCore"
    EndSection

All the 3 Mousebuttons of both the Trackpoint and the USB
Mouse work flawlessly.  But: the Scrollpoint is insensitive.

I guess that some proper setting got the Buttons and the
ZAxisMapping should do.  But which ones?

Are there any other ocnfig files that need to be told about
the two mice I am using?

Thanks for any help,
== Uwe ==