I've got a similar issue with Edgy on a Lenovo 3000 C100.
On a fresh installation of edgy, the touchpad was misconfigured. In fact there
was only a mouse input section:
Section "InputDevice"
Identifier "Configured Mouse"
Driver "mouse"
Option "CorePointer"
Option "Device" "/dev/input/mice"
Option "Protocol" "ExplorerPS/2"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "true"
EndSection
and some wacom devices which I don't have.
I had to manually add a synaptics section (generated by dpkg-reconfigure)
Section "InputDevice"
Identifier "Synaptics Touchpad"
Driver "synaptics"
Option "SendCoreEvents" "true"
Option "Device" "/dev/psaux"
Option "Protocol" "auto-dev"
Option "HorizScrollDelta" "0"
EndSection
and modify the ServerLayout accordingly.
Now touchpad scrolling works.
Maybe this is due to the fact that a USB mouse was plugged in during the
installation? Anyway the installer completely missed the touchpad.
--
xorg.conf - synaptics touchpad misdetected?
https://launchpad.net/bugs/46700
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