SYNAPTICS(4)SYNAPTICS(4)NAMEsynaptics - Synaptics touchpad input driver
SYNOPSIS
Section "InputDevice"
Identifier "devname"
Driver "synaptics"
Option "Device" "devpath"
Option "Path" "path"
...
EndSection
DESCRIPTIONsynaptics is an Xorg input driver for the touchpads from Synaptics
Incorporated. Even though these touchpads (by default, operating in a
compatibility mode emulating a standard mouse) can be handled by the
normal evdev or mouse drivers, this driver allows more advanced fea‐
tures of the touchpad to become available. Some benefits 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
implement this feature.)
· Pressure dependent motion speed.
· Run-time configuration using shared memory. This means you can
change parameter settings without restarting the X server.
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.)
CONFIGURATION DETAILS
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 "SHMConfig" "boolean"
Switch on/off shared memory for run-time configuration. Note
that this is considered a security risk since any user can
access the configuration. This option is not needed with synap‐
tics 1.0 or later. See section Device Properties.
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 "FingerPress" "integer"
When finger pressure goes above this value, the driver counts it
as a press. Currently a press is equivalent to putting the
touchpad in trackstick emulation mode. Property: "Synaptics Fin‐
ger"
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 "FastTaps" "boolean"
Makes the driver react faster to a single tap, but also makes
double clicks caused by double tapping slower. Property: "Synap‐
tics Tap FastTap"
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 "EdgeMotionMinZ" "integer"
Finger pressure at which minimum edge motion speed is set. Prop‐
erty: "Synaptics Edge Motion Pressure"
Option "EdgeMotionMaxZ" "integer"
Finger pressure at which maximum edge motion speed is set. Prop‐
erty: "Synaptics Edge Motion Pressure"
Option "EdgeMotionMinSpeed" "integer"
Slowest setting for edge motion speed. Property: "Synaptics Edge
Motion Speed"
Option "EdgeMotionMaxSpeed" "integer"
Fastest setting for edge motion speed. Property: "Synaptics Edge
Motion Speed"
Option "EdgeMotionUseAlways" "boolean"
If on, edge motion is also used for normal movements. If off,
egde motion is used only when dragging. Property: "Synaptics
Edge Motion Always"
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 "TrackstickSpeed" "float"
Speed scale when in trackstick emulation mode. Property: "Synap‐
tics Move Speed"
Option "PressureMotionMinZ" "integer"
Finger pressure at which minimum pressure motion factor is
applied. Property: "Synaptics Pressure Motion"
Option "PressureMotionMaxZ" "integer"
Finger pressure at which maximum pressure motion factor is
applied. 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 "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. 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. Prop‐
erty: "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.
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. 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. 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 (Alps),
this sets the Z pressure threshold to emulate a two finger
press. Property: "Synaptics Two-Finger Pressure"
Option "EmulateTwoFingerMinW" "integer"
Some touchpads report a two-finger touch as wide finger. This
sets the finger width threshold to emulate a two finger press.
This feature works best with (PalmDetect) off. Property: "Synap‐
tics Two-Finger Width"
Option "TouchpadOff" "integer"
Switch off the touchpad. Valid values are:
0 Touchpad is enabled
1 Touchpad is switched off
2 Only tapping and scrolling is switched off
Property: "Synaptics Off"
Option "GuestMouseOff" "boolean"
Switch on/off guest mouse (often a stick). Property: "Synaptics
Guestmouse 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
until 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
Action"
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
requires 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"
Coasting threshold scrolling speed. 0 disables coasting. Prop‐
erty: "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
device for exclusive use when using the linux 2.6 event proto‐
col. When using other protocols, this option has no effect.
Grabbing the event device means that no other user space or ker‐
nel 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 syn‐
client program, the change will not take effect until the synap‐
tics driver is disabled and reenabled. 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
alternative way of dragging. It is performed by tapping (touch‐
ing 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"
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 appro‐
priate edge parameters is to enable the SHMConfig option and run "syn‐
client -m 1" to see the x/y coordinates corresponding to different
positions on the touchpad.
Option "AreaLeftEdge" "integer"
Ignore movements, scrolling and tapping which take place 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. Property: "Synaptics Area"
Option "AreaRightEdge" "integer"
Ignore movements, scrolling and tapping which take place 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. Property: "Synaptics Area"
Option "AreaTopEdge" "integer"
Ignore movements, scrolling and tapping which take place 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. Property: "Synaptics Area"
Option "AreaBottomEdge" "integer"
Ignore movements, scrolling and tapping which take place 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. Property: "Synaptics Area"
Option "JumpyCursorThreshold" "integer"
Set the threshold above which movement events are ignored on
single-touch touchpads. The option is disabled by default and
can be enabled by setting the JumpyCursorThreshold option to any
integer value other than zero. Property: "Synaptics Jumpy Cursor
Threshold"
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
interacting with is harder to see. For this parameter to have any
effect, "FastTaps" has to be disabled.
The MinSpeed, MaxSpeed and AccelFactor parameters control the pointer
motion speed. The speed value defines the scaling between touchpad
coordinates 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 motion 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 disable vertical
or horizontal scrolling, set VertScrollDelta or HorizScrollDelta to
zero.
When hitting an egde, movement can be automatically continued. If
EdgeMotionUseAlways is false, edge motion is only used when dragging.
With EdgeMotionUseAlways set to true, it is also used for normal cursor
movements.
Edge motion speed is calculated by taking into account the amount of
pressure applied to the touchpad. The sensitivity can be adjusted
using the EdgeMotion parameters. If the pressure is below EdgeMotion‐
MinZ, EdgeMotionMinSpeed is used, and if the pressure is greater than
EdgeMotionMaxZ, EdgeMotionMaxSpeed is used. For a pressure value
between EdgeMotionMinZ and EdgeMotionMaxZ, the speed is increased lin‐
early.
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 parameters. If the pressure is below
PressureMotionMinZ, PressureMotionMinFactor is used, and if the pres‐
sure is greater than PressureMotionMaxZ, PressureMotionMaxFactor is
used. By default, PressureMotionMinZ and PressureMotionMaxZ are equal
to EdgeMotionMinZ and EdgeMotionMaxZ. For a pressure value between
PressureMotionMinZ and PressureMotionMaxZ, the factor is increased lin‐
early.
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 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 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.
Trackstick emulation mode is entered when pressing the finger hard on
the touchpad. The FingerPress parameter controls the minimum required
finger pressure. If the finger hasn't moved more than MaxTapMove after
MaxTapTime has elapsed, trackstick mode is entered. In this mode, mov‐
ing the finger slightly in any direction gives a speed vector that
moves the pointer. The TrackstickSpeed parameter controls the ratio
between pointer speed and finger movement distance. Trackstick mode is
exited when the finger pressure drops below FingerLow or when the fin‐
ger is moved further than MaxTapMove away from the initial position.
DEVICE PROPERTIES
Synaptics 1.0 and higher support input device properties if the driver
is running on X server 1.6 or higher. On these driver versions, Option
"SHMConfig" is not needed to enable run-time configuration. The syn‐
client tool shipped with synaptics version 1.1 uses input device prop‐
erties by default. Properties 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 Tap FastTap
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, trackstick.
Synaptics Edge Motion Pressure
32 bit, 2 values, min, max.
Synaptics Edge Motion Speed
32 bit, 2 values, min, max.
Synaptics Edge Motion Always
8 bit (BOOL).
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 Guestmouse Off
8 bit (BOOL).
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
element. 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.
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 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), 5 values (read-only), has left button, has middle
button, has right button, two-finger detection, three-finger
detection.
Synaptics Pad Resolution
32 bit unsigned, 2 values (read-only), vertical, horizontal in
units/millimeter.
Synaptics Jumpy Cursor Threshold
The Synaptics Jumpy Cursor Threshold parameter is used to sup‐
press movements (which take place in 20 milliseconds or less)
whose covered distance is greater than or equal to the threshold
on single-touch touchpads. This property is disabled by default.
32 bit, 1 value. 0 disables the property.
NOTES
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"
AUTHORS
Peter Osterlund <petero2@telia.com> and many others.
SEE ALSOXorg(1), xorg.conf(5), Xserver(1), X(7), synclient(1), syndaemon(1)X Version 11 xf86-input-synaptics 1.2.2 SYNAPTICS(4)
