Fixed! The odd behavior I was getting when I kept trying to scroll was
because my finger would occasionally register at a point on the pad that
was close enough to the "right edge" to be considered a scroll. Let me
explain:
The touchpad registers an (x,y) coordinate whenever you touch it; then
this is compared to the previous position to get a mouse movement or to
the "edge" of the touchpad to determine if its a scroll gesture. What I
think has been happening is the syntaptics driver is deciding what x
coordinate that edge has in a different way. Manually setting the x
coordinate of that edge did the trick for me.
Here's how:
1) turn on "SHMConfig" in your xorg.conf file (this makes synclient work)
2) run synclient -m 1000 - this program will tell you what the touchpad is
currently registering. Use it to get your min and max x and y values.
3) Use those values to manually set the edges in xorg.conf:
Section "InputDevice"
Identifier "Synaptics Touchpad"
Driver "synaptics"
Option "SendCoreEvents" "true"
Option "Device" "/dev/psaux"
Option "Protocol" "auto-dev"
Option "VertEdgeScroll" "1"
Option "HorizEdgeScroll" "1"
Option "SHMConfig" "true"
Option "LeftEdge" "40" # x_min
Option "RightEdge" "935" # x_max
Option "TopEdge" "40" # y_min
Option "BottomEdge" "690" # y_max
EndSection
4) Reboot X and repeat: I had to try several settings before I found the right
ones, so play with the values. It doesn't matter if your left and top edges
are too low, but you don't want your right and bottom too high or else it wont
work.
You can also use synclient -l to get your current edge positions, if
you'd like to start there instead.
About the HorizEdgeScroll: I'm not sure what's going on there, but I
don't know if these settings are used. I tried using
"VertTwoFingerScroll" "1" and it didn't work at all.
I hope this works for you.
-blue
--
Upgrade to Intrepid removes Synaptics touchpad vertical scrolling
https://bugs.launchpad.net/bugs/278585
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