2.807 3923 3224 1 1 14 0 0 0 0 0 00000000 0 0 0 0 0
2.911 3923 3224 0 0 0 0 0 0 0 0 00000000 0 0 0 0 0
8.423 4018 3986 131 2 5 0 0 0 0 0 00000000 0 0 0 0 0
8.527 4104 3933 134 2 5 0 0 0 0 0 00000000 0 0 0 0 0
8.631 4653 3827 0 0 0 0 0 0 0 0 00000000 0 0 0 0 0
...(
In this output, the following options indicate:
x , y , and z
Position and pressure of touch.
f
Finger count.
w
Finger width.
l , r , u , d , m , and multi
Button state (most touchpads have only the l and r buttons). 0 indicates the button is up; 1 indicates the button is down.
All columns starting with g
Guest (secondary) pointing device information, such as a finger button.
Once you have tweaked the values to suit your needs, add your preferred values to the Synaptics InputDevice section of the
Section 'InputDevice'
Identifier 'Touchpad0'
Driver 'synaptics'
Option 'SHMConfig' 'on'
Option 'VertScrollDelta' '10'
Option 'PalmDetect' '0'
EndSection
These settings will then take effect when the system is restarted.
3.3.2. How Does It Work?
The Synaptics TouchPad (or Alps GlidePad) device is connected through a PS/2 or USB interface and contains a microcontroller, touch sensor, buttons, and interface electronics. The firmware is programmed to emulate a standard mouse unless (or until) the device driver sends it codes to switch it into native mode.
The Synaptics driver works with the microcontroller in the touchpad to translate user activity into standard mouse signals. There are only 16 types of events that are reported to the X server: button down and button up for buttons 1 through 7, and horizontal and vertical motion. All of the possible tap, press, and slide gestures are translated into combinations of these 16 events.
For example, touching the pad with one finger on the right side (X position greater than RightEdge , and Y position between TopEdge and BottomEdge ), and then moving your finger up more than VertScrollDelta units will be interpreted as a vertical scroll action, which will result in a button-down event on button 4, followed by a button-up event on button 4 (this corresponds to rotating the scroll wheel forward one click on a standard mouse).
Not all touchpad models have the hardware or firmware to provide all of the features supported by the driver; for example, most models do not have all of the possible buttons, and some lack multiple-finger or finger- width detection.
3.3.3. What About...
3.3.3.1. ...using a touchpad and a mouse at the same time?
This can be done if the Synaptics device is defined in addition to a traditional mouse, as recommended in the X11 configuration shown in this lab.
3.3.3.2. ...disabling the touchpad automatically when I'm typing?
Even with palm detection, some typists and touchpads register false information during typing (especially true with certain laptop case designs, which transmit case stress to the touchpad). To help in these situations, the Synaptics software includes the
$ syndaemon
3.3.4. Where Can I Learn More?
? The manpages for
? The driver home page: http://web.telia.com/~u89404340/touchpad/
3.4. Using Dual Video Output
The video circuits of most laptops support two video outputs: one to the built-in LCD panel and one for external devices. The external output is not enabled by default, but you can switch between the internal and external displays using a function key.
More advanced configurations of the two outputs are supported by some video cards. For example, you can configure a single large desktop spanning both displays, or set up the external display to show a subset of what is shown on the internal display.
