Provided by: xserver-xorg-input-synaptics_1.8.2-1ubuntu3_i386 bug

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
       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.

       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
       device 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
              scenarios.

              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.
              Property: "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
              anywhere  on  the  touchpad.  Property:  "Synaptics   Two-Finger
              Scrolling"

       Option "HorizTwoFingerScroll" "boolean"
              Enable  horizontal  scrolling  when  dragging  with  two fingers
              anywhere  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
              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:
              "Synaptics 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
              motion is a problem for you. Zero  is  disabled.   Default:  0.5
              percent  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
              generates  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
              buttons.  Property: "Synaptics Button Scrolling"

       Option "UpDownScrollRepeat" "boolean"
              If  on,  and  the  up/down  buttons  are  used   for   scrolling
              (UpDownScrolling),  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
              (LeftRightScrolling), these buttons will send auto-repeating 6/7
              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 "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-
              Finger 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
              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
              finger.  Set to 0 to disable. Property: "Synaptics Click Action"

       Option "ClickFinger2" "integer"
              Which  mouse  button  is  reported  when  left-clicking with two
              fingers.  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.
              Property: "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.
              Property: "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
              order to start coasting.  The default is 20 which should prevent
              you   from   starting   coasting  unintentionally.   0  disables
              coasting. Property: "Synaptics Coasting Speed"

       Option "CoastingFriction" "float"
              Number  of  scrolls/second²  to  decrease  the  coasting  speed.
              Default 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
              device  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  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
              (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
              ®esolutionDetect" "" boolean " Allow or  prevent  the  synaptics
              driver  from reporting the size of the touchpad to the X server.
              The X server normally uses this information to  scale  movements
              so  that  touchpad movement corresponds visually to mouse cursor
              movements on the screen.  However, in some rare cases where  the
              touchpad  height/width ratio is significantly different from the
              laptop, it can cause the mouse cursor to skip pixels in the X or
              Y  axis.   This  option  allows disabling this scaling behavior,
              which  can  provide  smoother  mouse  movement  in  such  cases.
              Property: "Synaptics Resolution Detect"

       Option "VertResolution" "integer"
              Resolution  of  X  coordinates in units/millimeter. The value is
              used  together  with  HorizResolution  to   compensate   unequal
              vertical  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
              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 "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
              direction. Setting all values to 0 (not 0%) disables soft button
              areas. 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
              secondary  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
              areas 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
              "HasSecondarySoftButtons"  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
       positions 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
       interacting with is harder to see.  For  this  parameter  to  have  any
       effect, "FastTaps" has to be disabled.

   Acceleration
       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   invert   the
       direction  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
       profiles,  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
       parameters.     If    the   pressure   is   below   PressureMotionMinZ,
       PressureMotionMinFactor is used, and if the pressure  is  greater  than
       PressureMotionMaxZ,  PressureMotionMaxFactor  is  used.  For a pressure
       value between PressureMotionMinZ and PressureMotionMaxZ, the factor  is
       increased linearly.

   Middle button emulation
       Since   most  synaptics  touchpad  models  don't  have  a  button  that
       corresponds to the middle button on a mouse,  the  driver  can  emulate
       middle mouse button events.  If you press both the left and right mouse
       buttons at almost the same  time  (no  more  than  EmulateMidButtonTime
       milliseconds 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
       corner.  Once scrolling is engaged, moving  your  finger  in  clockwise
       circles  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 circular 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
       CornerCoasting is set to false.  When conventional coasting is enabled,
       horizontal/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  likelyhood  of  noise  motion  coming  through  also
       increases.

   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
       "SoftButtonAreas".  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,
       provide 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.
       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 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
              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, 2 values, speed, friction.

       Synaptics Pressure Motion
              32 bit, 2 values, min, max.

       Synaptics Pressure Motion Factor
              FLOAT, 2 values, min, max.

       Synaptics Resolution Detect
              8 bit (BOOL).

       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
              element.

       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
              middle  click  actions on a ClickPad device. Providing 0 for all
              values 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
              detection, 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/50-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
       ${sourcecode}/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
       TapButtons   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 "FastTaps" "boolean"

       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)