Deshabilitar el touchpad mentre escrius

Nota.

Com que no ha funcionat, la solució ràpida és:

Sistema > Preferències > Ratolí > Touchpad i desmarcar "Pulsación con un pequeño golpe"

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He trigat 1 any a adonar-me de quina és la causa d'aquest emprenyador efecte quan faig servir el portàtil. A vegades mentre escric, sense voler, amb el polze es toca el touchpad, i el cursor se'n va cap a una altra banda sense que te n'adonis.

Aquest tema Ubuntu el té resolt de fa temps, amb un dimoni que es diu syndaemon:

syndaemon(1)                                                                                                                                 syndaemon(1)

NAME
       syndaemon - a program that monitors keyboard activity and disables the touchpad when the keyboard is being used.

Segueix el post penjat a

http://ubuntu.wordpress.com/2006/09/20/disable-touchpad-temporarily-when-typing/

If you have edited this file but would like it to be automatically updated
# again, run the following command:

 sudo dpkg-reconfigure -phigh xserver-xorg

http://ubuntu.wordpress.com/2006/03/24/disable-synaptics-touchpad/

per deshabilitar el touchpad:
synclient TouchpadOff=1
i per habilitar-lo
synclient TouchpadOff=0

Can’t access shared memory area. SHMConfig disabled?



Section "InputDevice"
        Identifier      "Synaptics Touchpad"
        Driver          "synaptics"
        Option          "SendCoreEvents"        "true"
        Option          "Device"                "/dev/psaux"
        Option          "Protocol"              "auto-dev"  
        Option          "HorizEdgeScroll"       "0"
        Option          "SHMConfig"     "on"
EndSection



Section "InputDevice"
Identifier "Synaptics Touchpad"
Driver "synaptics"
Option "SendCoreEvents" "true"
Option "Device" "/dev/input/mouse0"
Option "Protocol" "auto-dev"
Option "HorizScrollDelta" "0"
Option "SHMConfig" "on"
EndSection

Section "InputDevice"
        Identifier      "Synaptics Touchpad"
        Driver          "synaptics"
        Option          "SendCoreEvents"        "true"
        Option          "Device"                "/dev/psaux"
        Option          "Protocol"              "auto-dev"
        Option          "HorizEdgeScroll"       "0"
        Option          "SHMConfig"             "on"
EndSection


per veure quins són els dispositius d'entrada que tinc:
cat /proc/bus/input/devices

i aquí puc identificar quin és el meu touchpad:
I: Bus=0011 Vendor=0002 Product=0008 Version=7321
N: Name="AlpsPS/2 ALPS GlidePoint"
P: Phys=isa0060/serio1/input0
S: Sysfs=/class/input/input5
U: Uniq=
H: Handlers=mouse3 event5 
B: EV=f
B: KEY=420 0 70000 0 0 0 0 0 0 0 0
B: REL=3
B: ABS=1000003

veig que el meu touchpad és un Alps i no pas un Synaptics
http://ubuntu.wordpress.com/2005/11/15/fixing-my-alps-touchpad-with-the-synaptics-driver/
i el meu xorg.conf l'hauré de configurar de la següent manera

Section "InputDevice"
        Identifier      "Alps Touchpad"
        Driver          "synaptics"
        Option          "SendCoreEvents"        "true"
        Option          "Device"                "/dev/input/event2"
        Option          "Protocol"              "event"
        Option          "HorizScrollDelta"      "0"
EndSection

Section "InputDevice"
        Identifier      "Alps Touchpad"
        Driver          "synaptics"
        Option          "SendCoreEvents"        "true"
        Option          "Device"                "/dev/input/event2"
        Option          "Protocol"              "event"
        Option "LeftEdge" "120"
        Option "RightEdge" "830"
        Option "TopEdge" "120"
        Option "BottomEdge" "650"
        Option "FingerLow" "14"
        Option "FingerHigh" "15"
        Option "MaxTapTime" "180"
        Option "MaxTapMove" "110"
        Option "ClickTime" "0"
        Option "EmulateMidButtonTime" "75"
        Option "VertScrollDelta" "10"
        Option "HorizScrollDelta" "0"
        Option "MinSpeed" "0.45"
        Option "MaxSpeed" "0.75"
        Option "AccelFactor" "0.020"
        Option "EdgeMotionMinSpeed" "200"
        Option "EdgeMotionMaxSpeed" "200"
        Option "UpDownScrolling" "1"
        Option "CircularScrolling" "0"
        Option "CircScrollDelta" "0.1"
        Option "CircScrollTrigger" "2"
        Option "SHMConfig" "true"
EndSection



Section "InputDevice"
        Identifier      "Alps Touchpad"
        Driver          "synaptics"
        Option          "SendCoreEvents"        "true"
        Option          "Device"                "/dev/input/event2"
        Option          "Protocol"              "event"
        Option          "HorizScrollDelta"      "0"
        Option 		"SHMConfig" 		"true"
EndSection

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creat per Joan Quintana Compte, desembre 2008