SYNAPTICS(4) Kernel Interfaces Manual SYNAPTICS(4)
NAME
synaptics - touchpad input driver
SYNOPSIS
Section "InputDevice"
Identifier "devname"
Driver "synaptics"
Option "Device" "devpath"
Option "Path" "path"
...
EndSection
DESCRIPTION
synaptics is an Xorg input driver for touchpads. Even though touchpads
can be handled by the normal evdev or mouse drivers, this driver allows
more advanced features of the touchpad to become available. Some bene-
fits would be:
• Movement with adjustable, non-linear acceleration and speed.
• Button events through short touching of the touchpad.
• Double-Button events through double short touching of the touchpad.
• Dragging through short touching and holding down the finger on the
touchpad (tap-and-drag gesture).
• Middle and right button events on the upper and lower corner of the
touchpad.
• Vertical scrolling (button four and five events) through moving the
finger on the right side of the touchpad.
• The up/down button sends button four/five events.
• Horizontal scrolling (button six and seven events) through moving
the finger on the lower side of the touchpad.
• The multi-buttons send button four/five events for vertical
scrolling and button six/seven events for horizontal scrolling.
• Adjustable finger detection.
• Multifinger taps: two finger for right button and three finger for
middle button events. (Needs hardware support. Not all models im-
plement this feature.)
• Pressure-dependent motion speed.
Note that depending on the touchpad firmware, some of these features
might be available even without using the synaptics driver. Note also
that some functions are not available on all touchpad models, because
they need support from the touchpad hardware/firmware. (Multifinger
taps for example.)
The name "synaptics" is historical and the driver still provides the
synaptics protocol parsing code. Under Linux however, the hardware-
specifics are handled by the kernel and this driver will work for any
touchpad that has a working kernel driver. If your device is recognized
as "PS/2 Mouse" or similar, the kernel driver does not support your de-
vice and this driver will only provide limited functionality.
CONFIGURATION OPTIONS
Please refer to xorg.conf(5) for general configuration details and for
options that can be used with all input drivers. This section only
covers configuration details specific to this driver.
The following driver Options are supported:
Option "Device" "string"
This option specifies the device file in your "/dev" directory
which will be used to access the physical device. Normally you
should use something like "/dev/input/eventX", where X is some
integer.
Option "Protocol" "string"
Specifies which kernel driver will be used by this driver. This
is the list of supported drivers and their default use scenar-
ios.
auto-dev automatic, default (recommend)
event Linux 2.6 kernel events
psaux raw device access (Linux 2.4)
psm FreeBSD psm driver
Option "LeftEdge" "integer"
X coordinate for left edge. Property: "Synaptics Edges"
Option "RightEdge" "integer"
X coordinate for right edge. Property: "Synaptics Edges"
Option "TopEdge" "integer"
Y coordinate for top edge. Property: "Synaptics Edges"
Option "BottomEdge" "integer"
Y coordinate for bottom edge. Property: "Synaptics Edges"
Option "FingerLow" "integer"
When finger pressure drops below this value, the driver counts
it as a release. Property: "Synaptics Finger"
Option "FingerHigh" "integer"
When finger pressure goes above this value, the driver counts it
as a touch. Property: "Synaptics Finger"
Option "MaxTapTime" "integer"
Maximum time (in milliseconds) for detecting a tap. Property:
"Synaptics Tap Durations"
Option "MaxTapMove" "integer"
Maximum movement of the finger for detecting a tap. Property:
"Synaptics Tap Move"
Option "MaxDoubleTapTime" "integer"
Maximum time (in milliseconds) for detecting a double tap. Prop-
erty: "Synaptics Tap Durations"
Option "ClickTime" "integer"
The duration of the mouse click generated by tapping. Property:
"Synaptics Tap Durations"
Option "ClickPad" "boolean"
Whether the device is a click pad. See ClickPad support for more
details. Property: "Synaptics ClickPad"
Option "VertEdgeScroll" "boolean"
Enable vertical scrolling when dragging along the right edge.
Property: "Synaptics Edge Scrolling"
Option "HorizEdgeScroll" "boolean"
Enable horizontal scrolling when dragging along the bottom edge.
Property: "Synaptics Edge Scrolling"
Option "CornerCoasting" "boolean"
Enable edge scrolling to continue while the finger stays in an
edge corner. Property: "Synaptics Edge Scrolling"
Option "VertTwoFingerScroll" "boolean"
Enable vertical scrolling when dragging with two fingers any-
where on the touchpad. Property: "Synaptics Two-Finger
Scrolling"
Option "HorizTwoFingerScroll" "boolean"
Enable horizontal scrolling when dragging with two fingers any-
where on the touchpad. Property: "Synaptics Two-Finger
Scrolling"
Option "VertScrollDelta" "integer"
Move distance of the finger for a scroll event. Property:
"Synaptics Scrolling Distance"
Option "HorizScrollDelta" "integer"
Move distance of the finger for a scroll event. Property:
"Synaptics Scrolling Distance"
Option "MinSpeed" "float"
Minimum speed factor. Property: "Synaptics Move Speed"
Option "MaxSpeed" "float"
Maximum speed factor. Property: "Synaptics Move Speed"
Option "AccelFactor" "float"
Acceleration factor for normal pointer movements. Property:
"Synaptics Move Speed"
Option "PressureMotionMinZ" "integer"
Finger pressure at which minimum pressure motion factor is ap-
plied. Property: "Synaptics Pressure Motion"
Option "PressureMotionMaxZ" "integer"
Finger pressure at which maximum pressure motion factor is ap-
plied. Property: "Synaptics Pressure Motion"
Option "PressureMotionMinFactor" "integer"
Lowest setting for pressure motion factor. Property: "Synaptics
Pressure Motion Factor"
Option "PressureMotionMaxFactor" "integer"
Greatest setting for pressure motion factor. Property: "Synap-
tics Pressure Motion Factor"
Option "HorizHysteresis" "integer"
The minimum horizontal HW distance required to generate motion
events. Can be specified as a percentage. Increase if noise mo-
tion is a problem for you. Zero is disabled. Default: 0.5 per-
cent of the diagonal or (in case of evdev) the appropriate
"fuzz" as advertised by the device.
Option "VertHysteresis" "integer"
The minimum vertical HW distance required to generate motion
events. See HorizHysteresis.
Option "UpDownScrolling" "boolean"
If on, the up/down buttons generate button 4/5 events. If off,
the up button generates a double click and the down button gen-
erates a button 2 event. This option is only available for
touchpads with physical scroll buttons. Property: "Synaptics
Button Scrolling"
Option "LeftRightScrolling" "boolean"
If on, the left/right buttons generate button 6/7 events. If
off, the left/right buttons both generate button 2 events. This
option is only available for touchpads with physical scroll but-
tons. Property: "Synaptics Button Scrolling"
Option "UpDownScrollRepeat" "boolean"
If on, and the up/down buttons are used for scrolling (UpDown-
Scrolling), these buttons will send auto-repeating 4/5 events,
with the delay between repeats determined by ScrollButtonRepeat.
This option is only available for touchpads with physical scroll
buttons. Property: "Synaptics Button Scrolling Repeat"
Option "LeftRightScrollRepeat" "boolean"
If on, and the left/right buttons are used for scrolling (Left-
RightScrolling), these buttons will send auto-repeating 6/7
events, with the delay between repeats determined by ScrollBut-
tonRepeat. This option is only available for touchpads with
physical scroll buttons. Property: "Synaptics Button Scrolling
Repeat"
Option "ScrollButtonRepeat" "integer"
The number of milliseconds between repeats of button events 4-7
from the up/down/left/right scroll buttons. This option is only
available for touchpads with physical scroll buttons. Property:
"Synaptics Button Scrolling Time"
Option "EmulateMidButtonTime" "integer"
Maximum time (in milliseconds) for middle button emulation.
Property: "Synaptics Middle Button Timeout"
Option "EmulateTwoFingerMinZ" "integer"
For touchpads not capable of detecting multiple fingers but are
capable of detecting finger pressure and width, this sets the Z
pressure threshold. When both Z pressure and W width thresholds
are crossed, a two finger press will be emulated. This defaults
to a value that disables emulation on touchpads with real two-
finger detection and defaults to a value that enables emulation
on remaining touchpads that support pressure and width support.
Property: "Synaptics Two-Finger Pressure"
Option "EmulateTwoFingerMinW" "integer"
For touchpads not capable of detecting multiple fingers but are
capable of detecting finger width and pressure, this sets the W
width threshold. When both W width and Z pressure thresholds
are crossed, a two finger press will be emulated. This feature
works best with (PalmDetect) off. Property: "Synaptics Two-Fin-
ger Width"
Option "TouchpadOff" "integer"
Switch off the touchpad. Valid values are:
0 Touchpad is enabled
1 Touchpad is switched off (physical clicks still work)
2 Only tapping and scrolling is switched off
When the touchpad is switched off, button events caused by a
physical button press are still interpreted. On a ClickPad, this
includes software-emulated middle and right buttons as defined
by the SoftButtonAreas setting.
Property: "Synaptics Off"
Option "LockedDrags" "boolean"
If off, a tap-and-drag gesture ends when you release the finger.
If on, the gesture is active until you tap a second time, or un-
til LockedDragTimeout expires. Property: "Synaptics Locked
Drags"
Option "LockedDragTimeout" "integer"
This parameter specifies how long it takes (in milliseconds) for
the LockedDrags mode to be automatically turned off after the
finger is released from the touchpad. Property: "Synaptics
Locked Drags Timeout"
Option "RTCornerButton" "integer"
Which mouse button is reported on a right top corner tap. Set
to 0 to disable. Property: "Synaptics Tap Action"
Option "RBCornerButton" "integer"
Which mouse button is reported on a right bottom corner tap.
Set to 0 to disable. Property: "Synaptics Tap Action"
Option "LTCornerButton" "integer"
Which mouse button is reported on a left top corner tap. Set to
0 to disable. Property: "Synaptics Tap Action"
Option "LBCornerButton" "integer"
Which mouse button is reported on a left bottom corner tap. Set
to 0 to disable. Property: "Synaptics Tap Action"
Option "TapButton1" "integer"
Which mouse button is reported on a non-corner one-finger tap.
Set to 0 to disable. Property: "Synaptics Tap Action"
Option "TapButton2" "integer"
Which mouse button is reported on a non-corner two-finger tap.
Set to 0 to disable. Property: "Synaptics Tap Action"
Option "TapButton3" "integer"
Which mouse button is reported on a non-corner three-finger tap.
Set to 0 to disable. Property: "Synaptics Tap Action"
Option "ClickFinger1" "integer"
Which mouse button is reported when left-clicking with one fin-
ger. Set to 0 to disable. Property: "Synaptics Click Action"
Option "ClickFinger2" "integer"
Which mouse button is reported when left-clicking with two fin-
gers. Set to 0 to disable. Property: "Synaptics Click Action"
Option "ClickFinger3" "integer"
Which mouse button is reported when left-clicking with three
fingers. Set to 0 to disable. Property: "Synaptics Click Ac-
tion"
Option "CircularScrolling" "boolean"
If on, circular scrolling is used. Property: "Synaptics Circular
Scrolling"
Option "CircScrollDelta" "float"
Move angle (radians) of finger to generate a scroll event. Prop-
erty: "Synaptics Circular Scrolling Distance"
Option "CircScrollTrigger" "integer"
Trigger region on the touchpad to start circular scrolling
0 All Edges
1 Top Edge
2 Top Right Corner
3 Right Edge
4 Bottom Right Corner
5 Bottom Edge
6 Bottom Left Corner
7 Left Edge
8 Top Left Corner
Property: "Synaptics Circular Scrolling Trigger"
Option "CircularPad" "boolean"
Instead of being a rectangle, the edge is the ellipse enclosed
by the Left/Right/Top/BottomEdge parameters. For circular
touchpads. Property: "Synaptics Circular Pad"
Option "PalmDetect" "boolean"
If palm detection should be enabled. Note that this also re-
quires hardware/firmware support from the touchpad. Property:
"Synaptics Palm Detection"
Option "PalmMinWidth" "integer"
Minimum finger width at which touch is considered a palm. Prop-
erty: "Synaptics Palm Dimensions"
Option "PalmMinZ" "integer"
Minimum finger pressure at which touch is considered a palm.
Property: "Synaptics Palm Dimensions"
Option "CoastingSpeed" "float"
Your finger needs to produce this many scrolls per second in or-
der to start coasting. The default is 20 which should prevent
you from starting coasting unintentionally. 0 disables coast-
ing. Property: "Synaptics Coasting Speed"
Option "CoastingFriction" "float"
Number of scrolls/second² to decrease the coasting speed. De-
fault is 50. Property: "Synaptics Coasting Speed"
Option "SingleTapTimeout" "integer"
Timeout after a tap to recognize it as a single tap. Property:
"Synaptics Tap Durations"
Option "GrabEventDevice" "boolean"
If GrabEventDevice is true, the driver will grab the event de-
vice for exclusive use when using the linux 2.6 event protocol.
When using other protocols, this option has no effect. Grabbing
the event device means that no other user space or kernel space
program sees the touchpad events. This is desirable if the X
config file includes /dev/input/mice as an input device, but is
undesirable if you want to monitor the device from user space.
When changing this parameter with the synclient program, the
change will not take effect until the synaptics driver is dis-
abled and re-enabled. This can be achieved by switching to a
text console and then switching back to X.
Option "TapAndDragGesture" "boolean"
Switch on/off the tap-and-drag gesture. This gesture is an al-
ternative way of dragging. It is performed by tapping (touching
and releasing the finger), then touching again and moving the
finger on the touchpad. The gesture is enabled by default and
can be disabled by setting the TapAndDragGesture option to
false. Property: "Synaptics Gestures"
Option "VertResolution" "integer"
Resolution of X coordinates in units/millimeter. The value is
used together with HorizResolution to compensate unequal verti-
cal and horizontal sensitivity. Setting VertResolution and
HorizResolution equal values means no compensation. Default
value is read from the touchpad or set to 1 if value could not
be read. Property: "Synaptics Pad Resolution"
Option "HorizResolution" "integer"
Resolution of Y coordinates in units/millimeter. The value is
used together with VertResolution to compensate unequal vertical
and horizontal sensitivity. Setting VertResolution and HorizRes-
olution equal values means no compensation. Default value is
read from the touchpad or set to 1 if value could not be read.
Property: "Synaptics Pad Resolution"
Option "AreaLeftEdge" "integer"
Ignore movements, scrolling and tapping which start left of this
edge. The option is disabled by default and can be enabled by
setting the AreaLeftEdge option to any integer value other than
zero. If supported by the server (version 1.9 and later), the
edge may be specified in percent of the total width of the
touchpad. Property: "Synaptics Area"
Option "AreaRightEdge" "integer"
Ignore movements, scrolling and tapping which start right of
this edge. The option is disabled by default and can be enabled
by setting the AreaRightEdge option to any integer value other
than zero. If supported by the server (version 1.9 and later),
the edge may be specified in percent of the total width of the
touchpad. Property: "Synaptics Area"
Option "AreaTopEdge" "integer"
Ignore movements, scrolling and tapping which start above this
edge. The option is disabled by default and can be enabled by
setting the AreaTopEdge option to any integer value other than
zero. If supported by the server (version 1.9 and later), the
edge may be specified in percent of the total height of the
touchpad. Property: "Synaptics Area"
Option "AreaBottomEdge" "integer"
Ignore movements, scrolling and tapping which start below this
edge. The option is disabled by default and can be enabled by
setting the AreaBottomEdge option to any integer value other
than zero. If supported by the server (version 1.9 and later),
the edge may be specified in percent of the total height of the
touchpad. Property: "Synaptics Area"
Option "SoftButtonAreas" "RBL RBR RBT RBB MBL MBR MBT MBB"
This option is only available on ClickPad devices. Enable soft
button click area support on ClickPad devices. The first four
parameters are the left, right, top, bottom edge of the right
button, respectively, the second four parameters are the left,
right, top, bottom edge of the middle button, respectively. Any
of the values may be given as percentage of the touchpad width
or height, whichever applies. If any edge is set to 0 (not 0%),
the button is assumed to extend to infinity in the given direc-
tion. Setting all values to 0 (not 0%) disables soft button ar-
eas. Button areas may not overlap, however it is permitted for
two buttons to share an edge value. Property: "Synaptics Soft
Button Areas"
Option "HasSecondarySoftButtons" "boolean"
This option is only available on ClickPad devices. Enable the
secondary software button area support. The exact area must be
set in option "SecondarySoftButtonAreas". See ClickPad support
for more details.
Option "SecondarySoftButtonAreas" "RBL RBR RBT RBB MBL MBR MBT MBB"
This option is only available on ClickPad devices and only if
Option "HasSecondarySoftButtons" is enabled. Define the sec-
ondary soft button click areas on ClickPad devices (usually on
top of the device). For the allowed values for this option, see
Option "SoftButtonAreas". Primary and secondary soft button ar-
eas must not overlap each other. If they do, the behavior of the
driver is undefined. Property: "Synaptics Secondary Soft Button
Areas". This property is only initialized if Option "HasSec-
ondarySoftButtons" is enabled and this option is set in the
xorg.conf(5).
CONFIGURATION DETAILS
Area handling
The LeftEdge, RightEdge, TopEdge and BottomEdge parameters are used to
define the edge and corner areas of the touchpad. The parameters split
the touchpad area in 9 pieces, like this:
│ │
│ LeftEdge │ RightEdge
┌─────└─────────────└───┐ Physical top edge
│ 1 │ 2 │ 3 │
└─────└─────────────└───┘ TopEdge
│ │ │ │
│ 4 │ 5 │ 6 │
│ │ │ │
└─────└─────────────└───┘ BottomEdge
│ 7 │ 8 │ 9 │
└─────└─────────────└───┘ Physical bottom edge
│Physical left edge │ Physical right edge
Coordinates to the left of LeftEdge are part of the left edge (areas 1,
4 and 7), coordinates to the left of LeftEdge and above TopEdge (area
1) are part of the upper left corner, etc.
A good way to find appropriate edge parameters is to use evtest(1) on
the device to see the x/y coordinates corresponding to different posi-
tions on the touchpad.
The perceived physical edges may be adjusted with the AreaLeftEdge,
AreaRightEdge, AreaTopEdge, and AreaBottomEdge options. If these values
are set to something other than the physical edges, input that starts
in the space between the area edge and the respective physical edge is
ignored. Note that this reduces the available space on the touchpad to
start motions in.
Tapping
A tap event happens when the finger is touched and released in a time
interval shorter than MaxTapTime, and the touch and release coordinates
are less than MaxTapMove units apart. A "touch" event happens when the
Z value goes above FingerHigh, and an "untouch" event happens when the
Z value goes below FingerLow.
The MaxDoubleTapTime parameter has the same function as the MaxTapTime
parameter, but for the second, third, etc tap in a tap sequence. If
you can't perform double clicks fast enough (for example, xmms depends
on fast double clicks), try reducing this parameter. If you can't get
word selection to work in xterm (ie button down, button up, button
down, move mouse), try increasing this parameter.
The ClickTime parameter controls the delay between the button down and
button up X events generated in response to a tap event. A too long
value can cause undesirable autorepeat in scroll bars and a too small
value means that visual feedback from the gui application you are in-
teracting with is harder to see.
Acceleration
The MinSpeed, MaxSpeed and AccelFactor parameters control the pointer
motion speed. The speed value defines the scaling between touchpad co-
ordinates and screen coordinates. When moving the finger very slowly,
the MinSpeed value is used, when moving very fast the MaxSpeed value is
used. When moving the finger at moderate speed, you get a pointer mo-
tion speed somewhere between MinSpeed and MaxSpeed. If you don't want
any acceleration, set MinSpeed and MaxSpeed to the same value.
The MinSpeed, MaxSpeed and AccelFactor parameters don't have any effect
on scrolling speed. Scrolling speed is determined solely from the
VertScrollDelta and HorizScrollDelta parameters. To invert the direc-
tion of vertical or horizontal scrolling, set VertScrollDelta or
HorizScrollDelta to a negative value.
Acceleration is mostly handled outside the driver, thus the driver will
translate MinSpeed into constant deceleration and adapt MaxSpeed at
startup time. This ensures you can user the other acceleration pro-
files, albeit without pressure motion. However the numbers at runtime
will likely be different from any options you may have set.
Pressure motion
When pressure motion is activated, the cursor motion speed depends on
the pressure exerted on the touchpad (the more pressure exerted on the
touchpad, the faster the pointer). More precisely the speed is first
calculated according to MinSpeed, MaxSpeed and AccelFactor, and then is
multiplied by a sensitivity factor.
The sensitivity factor can be adjusted using the PressureMotion parame-
ters. If the pressure is below PressureMotionMinZ, PressureMotionMin-
Factor is used, and if the pressure is greater than PressureMotionMaxZ,
PressureMotionMaxFactor is used. For a pressure value between Pres-
sureMotionMinZ and PressureMotionMaxZ, the factor is increased lin-
early.
Middle button emulation
Since most synaptics touchpad models don't have a button that corre-
sponds to the middle button on a mouse, the driver can emulate middle
mouse button events. If you press both the left and right mouse but-
tons at almost the same time (no more than EmulateMidButtonTime mil-
liseconds apart) the driver generates a middle mouse button event.
Circular scrolling
Circular scrolling acts like a scrolling wheel on the touchpad.
Scrolling is engaged when a drag starts in the given CircScrollTrigger
region, which can be all edges, a particular side, or a particular cor-
ner. Once scrolling is engaged, moving your finger in clockwise cir-
cles around the center of the touchpad will generate scroll down events
and counter clockwise motion will generate scroll up events. Lifting
your finger will disengage circular scrolling. Use tight circles near
the center of the pad for fast scrolling and large circles for better
control. When used together with vertical scrolling, hitting the upper
or lower right corner will seamlessly switch over from vertical to cir-
cular scrolling.
Coasting
Coasting is enabled by setting the CoastingSpeed parameter to a non-
zero value. Coasting comes in two flavors: conventional (finger off)
coasting, and corner (finger on) coasting.
Conventional coasting is enabled when coasting is enabled, and Corner-
Coasting is set to false. When conventional coasting is enabled, hori-
zontal/vertical scrolling can continue after the finger is released
from the lower/right edge of the touchpad. The driver computes the
scrolling speed corresponding to the finger speed immediately before
the finger leaves the touchpad. If this scrolling speed is larger than
the CoastingSpeed parameter (measured in scroll events per second), the
scrolling will continue with the same speed in the same direction until
the finger touches the touchpad again.
Corner coasting is enabled when coasting is enabled, and CornerCoasting
is set to true. When corner coasting is enabled, edge scrolling can
continue as long as the finger stays in a corner. Coasting begins when
the finger enters the corner, and continues until the finger leaves the
corner. CornerCoasting takes precedence over the seamless switch from
edge scrolling to circular scrolling. That is, if CornerCoasting is
active, scrolling will stop, and circular scrolling will not start,
when the finger leaves the corner.
Noise cancellation
The synaptics has a built-in noise cancellation based on hysteresis.
This means that incoming coordinates actually shift a box of predefined
dimensions such that it covers the incoming coordinate, and only the
boxes own center is used as input. Obviously, the smaller the box the
better, but the likelihood of noise motion coming through also in-
creases.
ClickPad support
A click pad device has button(s) integrated into the touchpad surface.
The user must press downward on the touchpad in order to generated a
button press. ClickPad support is enabled if the option ClickPad is set
or the property is set at runtime. On some platforms, this option will
be set automatically if the kernel detects a matching device. On Linux,
the device must have the INPUT_PROP_BUTTONPAD property set.
ClickPads do not support middle mouse button emulation. If enabling
ClickPad support at runime, the user must also set the middle mouse
button timeout to 0. If auto-detected, middle mouse button emulation is
disabled by the driver.
ClickPads provide software emulated buttons through Option "SoftBut-
tonAreas". These buttons enable areas on the touchpad to perform as
right or middle mouse button. When the user performs a click within a
defined soft button area, a right or middle click is performed.
Some laptops, most notably the Lenovo T440, T540 and x240 series, pro-
vide a pointing stick without physical buttons. On those laptops, the
top of the touchpad acts as software-emulated button area. This area
can be enabled with Option "HasSecondarySoftButtons" and configured
with Option "SecondarySoftButtonAreas". On some platforms, this option
will be set automatically if the kernel detects a matching device. On
Linux, the device must have the INPUT_PROP_TOPBUTTONPAD property set.
DEVICE PROPERTIES
Synaptics 1.0 and higher support input device properties if the driver
is running on X server 1.6 or higher. The synclient tool shipped with
synaptics version 1.1 uses input device properties by default. Proper-
ties supported:
Synaptics Edges
32 bit, 4 values, left, right, top, bottom.
Synaptics Finger
32 bit, 3 values, low, high, press.
Synaptics Tap Time
32 bit.
Synaptics Tap Move
32 bit.
Synaptics Tap Durations
32 bit, 3 values, single touch timeout, max tapping time for
double taps, duration of a single click.
Synaptics ClickPad
8 bit (Bool).
Synaptics Middle Button Timeout
32 bit.
Synaptics Two-Finger Pressure
32 bit.
Synaptics Two-Finger Width
32 bit.
Synaptics Scrolling Distance
32 bit, 2 values, vert, horiz.
Synaptics Edge Scrolling
8 bit (BOOL), 3 values, vertical, horizontal, corner.
Synaptics Two-Finger Scrolling
8 bit (BOOL), 2 values, vertical, horizontal.
Synaptics Move Speed
FLOAT, 4 values, min, max, accel, <deprecated>
Synaptics Button Scrolling
8 bit (BOOL), 2 values, updown, leftright.
Synaptics Button Scrolling Repeat
8 bit (BOOL), 2 values, updown, leftright.
Synaptics Button Scrolling Time
32 bit.
Synaptics Off
8 bit, valid values (0, 1, 2).
Synaptics Locked Drags
8 bit (BOOL).
Synaptics Locked Drags Timeout
32 bit.
Synaptics Tap Action
8 bit, up to MAX_TAP values (see synaptics.h), 0 disables an el-
ement. order: RT, RB, LT, LB, F1, F2, F3.
Synaptics Click Action
8 bit, up to MAX_CLICK values (see synaptics.h), 0 disables an
element. order: Finger 1, 2, 3.
Synaptics Circular Scrolling
8 bit (BOOL).
Synaptics Circular Scrolling Distance
FLOAT.
Synaptics Circular Scrolling Trigger
8 bit, valid values 0..8 (inclusive) order: any edge, top, top +
right, right, right + bottom, bottom, bottom + left, left, left
+ top.
Synaptics Circular Pad
8 bit (BOOL).
Synaptics Palm Detection
8 bit (BOOL).
Synaptics Palm Dimensions
32 bit, 2 values, width, z.
Synaptics Coasting Speed
FLOAT, 2 values, speed, friction.
Synaptics Pressure Motion
32 bit, 2 values, min, max.
Synaptics Pressure Motion Factor
FLOAT, 2 values, min, max.
Synaptics Grab Event Device
8 bit (BOOL).
Synaptics Gestures
8 bit (BOOL), 1 value, tap-and-drag.
Synaptics Area
The AreaLeftEdge, AreaRightEdge, AreaTopEdge and AreaBottomEdge
parameters are used to define the edges of the active area of
the touchpad. All movements, scrolling and tapping which take
place outside of this area will be ignored. This property is
disabled by default.
32 bit, 4 values, left, right, top, bottom. 0 disables an ele-
ment.
Synaptics Soft Button Areas
This property is only available on ClickPad devices. The Right
and middle soft button areas are used to support right and mid-
dle click actions on a ClickPad device. Providing 0 for all val-
ues of a given button disables the button area.
32 bit, 8 values, RBL, RBR, RBT, RBB, MBL, MBR, MBT, MBB.
Synaptics Capabilities
This read-only property expresses the physical capability of the
touchpad, most notably whether the touchpad hardware supports
multi-finger tapping and scrolling.
8 bit (BOOL), 7 values (read-only), has left button, has middle
button, has right button, two-finger detection, three-finger de-
tection, pressure detection, and finger/palm width detection.
Synaptics Pad Resolution
32 bit unsigned, 2 values (read-only), vertical, horizontal in
units/millimeter.
NOTES
Configuration through InputClass sections is recommended in X servers
1.8 and later. See xorg.conf.d(5) for more details. An example
xorg.conf.d snippet is provided in ${sourcecode}/conf/70-synaptics.conf
Configuration through hal fdi files is recommended in X servers 1.5,
1.6 and 1.7. An example hal policy file is provided in ${source-
code}/conf/11-x11-synaptics.fdi
If either of Protocol "auto-dev" (default) or Protocol "event" is used,
the driver initializes defaults based on the capabilities reported by
the kernel driver. Acceleration, edges and resolution are based on the
dimensions reported by the kernel. If the kernel reports multi-finger
detection, two-finger vertical scrolling is enabled, horizontal two-
finger scrolling is disabled and edge scrolling is disabled. If no
multi-finger capabilities are reported, edge scrolling is enabled for
both horizontal and vertical scrolling. Tapping is disabled by default
for touchpads with one or more physical buttons. To enable it you need
to map tap actions to buttons. See the "TapButton1", "TapButton2" and
"TapButton3" options.
Button mapping for physical buttons is handled in the server. If the
device is switched to left-handed (an in-server mapping of physical
buttons 1, 2, 3 to the logical buttons 3, 2, 1, respectively), both
physical and TapButtons are affected. To counteract this, the TapBut-
tons need to be set up in reverse order (TapButton1=3, TapButton2=1).
REMOVED OPTIONS
The following options are no longer part of the driver configuration:
Option "Repeater" "string"
Option "HistorySize" "integer"
Option "SpecialScrollAreaRight" "boolean"
Option "GuestMouseOff" "boolean"
Option "SHMConfig" "boolean"
Option "FingerPress" "integer"
Option "TrackstickSpeed" "float"
Option "EdgeMotionMinZ" "integer"
Option "EdgeMotionMaxZ" "integer"
Option "EdgeMotionMinSpeed" "integer"
Option "EdgeMotionMaxSpeed" "integer"
Option "EdgeMotionUseAlways" "boolean"
AUTHORS
Peter Osterlund <petero2@telia.com> and many others.
SEE ALSO
Xorg(1), xorg.conf(5), Xserver(1), X(7), synclient(1), syndaemon(1)
X Version 11 xf86-input-synaptics 1.9.2 SYNAPTICS(4)
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