1. For use with kernel 2.6.x you need to enable synaptics touchpad
[2008-11-28 16:23] support when configuring the kernel (CONFIG_MOUSE_PS2). You also
[2008-11-28 16:23] need support for the evdev interface (CONFIG_INPUT_EVDEV). If you
[2008-11-28 16:23] compile evdev as a module, make sure it is loaded before starting
[2008-11-28 16:23] the X server, as it will not be auto-loaded
[2008-11-28 16:23]
[2008-11-28 16:23] ==> 2. Change your /etc/X11/XF86Config or /etc/X11/xorg.conf:
[2008-11-28 16:23]  
[2008-11-28 16:23] – Load the driver by changig the XFree configuration file
[2008-11-28 16:23] adding the line ‘Load "synaptics"’ in the module section
[2008-11-28 16:23]  
[2008-11-28 16:23] – Add/Replace in the InputDevice section for the touchpad the
[2008-11-28 16:23] following lines:
[2008-11-28 16:23]
[2008-11-28 16:23] Section "InputDevice"
[2008-11-28 16:23] Driver "synaptics"
[2008-11-28 16:23] Identifier "Mouse[1]"
[2008-11-28 16:23] Option "Device" "/dev/psaux"
[2008-11-28 16:23] Option "Protocol" "auto-dev"
[2008-11-28 16:23] Option "LeftEdge" "1700"
[2008-11-28 16:23] Option "RightEdge" "5300"
[2008-11-28 16:23] Option "TopEdge" "1700"
[2008-11-28 16:23] Option "BottomEdge" "4200"
[2008-11-28 16:23] Option "FingerLow" "25"
[2008-11-28 16:23] Option "FingerHigh" "30"
[2008-11-28 16:23] Option "MaxTapTime" "180"
[2008-11-28 16:23] Option "MaxTapMove" "220"
[2008-11-28 16:23] Option "VertScrollDelta" "100"
[2008-11-28 16:23] Option "MinSpeed" "0.06"
[2008-11-28 16:23] Option "MaxSpeed" "0.12"
[2008-11-28 16:23] Option "AccelFactor" "0.0010"
[2008-11-28 16:23] Option "SHMConfig" "on"
[2008-11-28 16:23] # Option "Repeater" "/dev/ps2mouse"
[2008-11-28 16:23] EndSection
[2008-11-28 16:23]
[2008-11-28 16:23] – Change the Identifier to the same name as in the ServerLayout section.
[2008-11-28 16:23] The Option "Repeater" is at the moment for testing.
[2008-11-28 16:23]
[2008-11-28 16:23] – Add the "CorePointer" option to the InputDevice line at the ServerLayout section:
[2008-11-28 16:23]
[2008-11-28 16:23] Section "ServerLayout"
[2008-11-28 16:23] InputDevice "Mouse[1]" "CorePointer"
[2008-11-28 16:23]
[2008-11-28 16:23] – Note! You can not have more than one core pointer, so if you want
[2008-11-28 16:23] to use an external mouse too, you have to set all mouse input
[2008-11-28 16:23] devices except one to "AlwaysCore" instead of "CorePointer".
[2008-11-28 16:23] installed synaptics (0.14.6.99-2)

总结如下：根据上面的帮助修改xorg文件。问题解决，触摸版边缘的滚动功能可以使用了。