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Old 12-20-2008, 05:27 PM   #1
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Registered: Sep 2007
Distribution: Debian Lenny
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How to disable synaptics touchpad vertical scrolling

I am using Debian Lenny on T61 (refer to my signature). I found vertical scrolling of the touch pad is annoying since T61 has a small touch area. I checked gnome options and tried to use tpconfig but didn't make it. Here is the tpconfig -i output:

Found Synaptics Touchpad.
Firmware: 8.96 (multiple-byte mode).
Sensor type: unknown (0).
Geometry: rectangular/landscape/up.
Packets: absolute, 80 packets per second.
Corner taps disabled; no tap gestures.
Edge motion: none.
Z threshold: 6 of 7.
2 button mode; corner tap is right button click.

From tpconfig man helps, I even didn't find one option for vertical scrolling.

Any one has a idea? Thank you very much!
Old 12-20-2008, 05:29 PM   #2
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And here is my xorg.conf touch pad section:

Section "InputDevice"
Identifier "Synaptics Touchpad"
Driver "synaptics"
Option "SendCoreEvents" "true"
Option "Device" "/dev/psaux"
Option "Protocol" "auto-dev"
Option "HorizScrollDelta" "0"

BTW, what does "HorizScrollDelta" mean? Is there something like "VerticalScrollDelta" can be used to disable vertical scrolling? Thank you!
Old 12-20-2008, 05:43 PM   #3
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BTW, what does "HorizScrollDelta" mean?
Please see man synaptics for the full story.
Old 12-21-2008, 04:33 PM   #4
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Thank you!

There is a bool type VertEdgeScroll option in man synaptics. It works!

Last edited by olin; 12-29-2008 at 08:43 AM.
Old 12-21-2008, 05:05 PM   #5
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Section "InputDevice"
Identifier "Synaptics Touchpad"
Driver "synaptics"
Option "SendCoreEvents" "true"
Option "Device" "/dev/psaux"
Option "Protocol" "auto-dev"
# Option "HorizScrollDelta" "0"
now you will not have horizontal you want that.
Option "ZAxisMapping" "4 5 6 7"
option 4 5 are up and down 6 7 left and right give it a try let me know.
Option "ZAxisMapping" " 6 7"

Last edited by Drakeo; 12-21-2008 at 05:11 PM.
Old 01-12-2009, 01:11 AM   #6
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Fedora 10, no tap click, no pad scroll:


I did this yesterday to disable clicking and scrolling on toucpad:

(machine: BIM Thinkpad T43, OS: Fedora 10 i386)

# cat > /etc/hal/fdi/policy/synaptics_notabnorscroll.fdi <<EOF
<?xml version="1.0" encoding="ISO-8859-1"?>
<!-- copy this to /etc/has/fdi/policy/ -->
<deviceinfo version="0.2">
<match key="input.x11_driver" string="synaptics">
<merge key="input.x11_options.SendCoreEvents" type="string">true</merge>
<merge key="input.x11_options.HorizScrollDelta" type="string">0</merge>
<merge key="input.x11_options.MaxTapTime" type="string">0</merge>
<merge key="input.x11_options.RightEdge" type="string">6000</merge>
<merge key="input.x11_options.BottomEdge" type="string">5000</merge>
<merge key="input.x11_options.VertEdgeScroll" type="string">false</merge>
<merge key="input.x11_options.HorizEdgeScroll" type="string">false</merge>

# /etc/init.d/haldaemon restart

# <ctrl-alt-backspace>

(last key combination restarted X server)

After re-login touchpad worked as desired.

I am going to do similar thing with one Ubuntu 8.10 (dell laptop) in near future;
I do not expect much difference getting it to work...

Btw: is there way to insert verbatim text in this forum? The indentation
was lost in the data above (luckily I was not pasting python code

Last edited by domo141; 01-12-2009 at 01:12 AM.


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