Provided by: xserver-xorg-input-evdev_2.10.1-1ubuntu2_i386 bug


       evdev - Generic Linux input driver


       Section "InputDevice"
         Identifier "devname"
         Driver "evdev"
         Option "Device"   "devpath"
         Option "Emulate3Buttons"     "True"
         Option "Emulate3Timeout"     "50"
         Option "GrabDevice"     "False"


       evdev  is  an  Xorg input driver for Linux´s generic event devices.  It
       therefore supports all input  devices  that  the  kernel  knows  about,
       including most mice, keyboards, tablets and touchscreens.  evdev is the
       default driver on the major Linux distributions.

       The evdev driver can serve as both  a  pointer  and  a  keyboard  input
       device.  Multiple  input devices are supported by multiple instances of
       this driver, with one InputDevice section of your  xorg.conf  for  each
       input device that will use this driver.

       It  is  recommended  that  evdev  devices  are  configured  through the
       InputClass directive (refer to xorg.conf(5))  instead  of  manual  per-
       device  configuration.  Devices  configured in the xorg.conf(5) are not
       hot-plug capable.


       In general, any input device that the kernel has a driver  for  can  be
       accessed  through the evdev driver.  See the Linux kernel documentation
       for a complete list.


       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 "ButtonMapping" "string"
              Sets the button mapping for this device. The mapping is a space-
              separated  list  of  button mappings that correspond in order to
              the physical buttons on the device (i.e. the first number is the
              mapping  for  button 1, etc.). The default mapping is "1 2 3 ...
              32". A mapping of 0 deactivates the button. Multiple buttons can
              have  the  same  mapping.  For example, a left-handed mouse with
              deactivated scroll-wheel would use a mapping of "3  2  1  0  0".
              Invalid  mappings  are  ignored and the default mapping is used.
              Buttons not specified in the  user's  mapping  use  the  default

       Option "Device" "string"
              Specifies  the  device through which the device can be accessed.
              This will generally be of the form "/dev/input/eventX", where  X
              is  some  integer.   The mapping from device node to hardware is
              system-dependent. Property: "Device Node" (read-only).

       Option "DragLockButtons" "L1 B2 L3 B4"
              Sets "drag lock buttons" that simulate holding a button down, so
              that  low  dexterity people do not have to hold a button down at
              the same time they move a mouse cursor. Button numbers occur  in
              pairs,  with the lock button number occurring first, followed by
              the button number  that  is  the  target  of  the  lock  button.
              Property: "Evdev Drag Lock Buttons".

       Option "DragLockButtons" "M1"
              Sets  a  "master  drag  lock  button"  that acts as a "Meta Key"
              indicating that the next button pressed is to be "drag  locked".
              Property: "Evdev Drag Lock Buttons".

       Option "Emulate3Buttons" "boolean"
              Enable/disable  the emulation of the third (middle) mouse
              button for mice which only  have  two  physical  buttons.
              The  third  button  is  emulated by pressing both buttons
              simultaneously.  Default: off.  Property:  "Evdev  Middle
              Button Emulation".

       Option "Emulate3Timeout" "integer"
              Sets  the timeout (in milliseconds) that the driver waits
              before   deciding   if   two   buttons   where    pressed
              "simultaneously"  when  3  button  emulation  is enabled.
              Default: 50. Property: "Evdev Middle Button Timeout".

       Option "EmulateWheel" "boolean"
              Enable/disable "wheel" emulation.  Wheel emulation  means
              emulating  button  press/release events when the mouse is
              moved while a specific real  button  is  pressed.   Wheel
              button  events  (typically  buttons  4 and 5) are usually
              used  for  scrolling.   Wheel  emulation  is  useful  for
              getting  wheel-like  behaviour  with  trackballs.  It can
              also be useful for mice with 4 or  more  buttons  but  no
              wheel.   See  the  description of the EmulateWheelButton,
              EmulateWheelInertia,  EmulateWheelTimeout,  XAxisMapping,
              and  YAxisMapping options.  Default: off. Property "Evdev
              Wheel Emulation".

       Option "EmulateWheelButton" "integer"
              Specifies which button must be held down to enable  wheel
              emulation  mode.   While  this button is down, X and/or Y
              pointer  movement  will  generate  button   press/release
              events as specified for the XAxisMapping and YAxisMapping
              settings. If the button is 0 and EmulateWheel is on,  any
              motion  of  the  device  is  converted into wheel events.
              Default: 4.  Property: "Evdev Wheel Emulation Button".

       Option "EmulateWheelInertia" "integer"
              Specifies how far (in pixels) the pointer  must  move  to
              generate  button  press/release events in wheel emulation
              mode.  Default:  10.  Property:  "Evdev  Wheel  Emulation

       Option "EmulateWheelTimeout" "integer"
              Specifies the time in milliseconds the EmulateWheelButton
              must be pressed before wheel emulation is started. If the
              EmulateWheelButton  is  released before this timeout, the
              original button press/release event  is  sent.   Default:
              200. Property: "Evdev Wheel Emulation Timeout".

       Option "EmulateThirdButton" "boolean"
              Enable  third  button  emulation.  Third button emulation
              emits a right button event (by default) by  pressing  and
              holding  the  first button. The first button must be held
              down for the configured timeout and must  not  move  more
              than  the  configured  threshold  for  the  emulation  to
              activate. Otherwise, the first button event is posted  as
              normal.  Default:  off.   Property:  "Evdev  Third Button

       Option "EmulateThirdButtonTimeout" "integer"
              Specifies the timeout in milliseconds between the initial
              button  press  and  the generation of the emulated button
              event.  Default:  1000.  Property:  "Evdev  Third  Button
              Emulation Timeout".

       Option "EmulateThirdButtonButton" "integer"
              Specifies  the  physical  button  number to be emitted if
              third  button  emulation  is  triggered.    Default:   3.
              Property: "Evdev Third Button Button".

       Option "EmulateThirdButtonMoveThreshold" "integer"
              Specifies the maximum move fuzz in device coordinates for
              third button emulation. If the device moves by more  than
              this  threshold  before  the  third  button  emulation is
              triggered, the emulation is cancelled and a first  button
              event  is  generated  as  normal.  Default: 20. Property:
              "Evdev Third Button Emulation Threshold".

       Option "GrabDevice" "boolean"
              Force a grab on the event device. Doing  so  will  ensure
              that  no  other driver can initialise the same device and
              it will also stop  the  device  from  sending  events  to
              /dev/kbd or /dev/input/mice. Events from this device will
              not be sent  to  virtual  devices  (e.g.  rfkill  or  the
              Macintosh mouse button emulation).  Default: disabled.

       Option "InvertX" "Bool"

       Option "InvertY" "Bool"
              Invert  the  given  axis.  Default: off. Property: "Evdev
              Axis Inversion".

       Option "IgnoreRelativeAxes" "Bool"

       Option "IgnoreAbsoluteAxes" "Bool"
              Ignore the specified type of axis. Default: unset. The  X
              server  cannot  deal with devices that have both relative
              and absolute axes. Evdev tries  to  guess  wich  axes  to
              ignore  given  the device type and disables absolute axes
              for mice and relative axes for tablets, touchscreens  and
              touchpad. These options allow to forcibly disable an axis
              type. Mouse wheel axes are exempt and will work  even  if
              relative    axes   are   ignored.   No   property,   this
              configuration must be set in the configuration.
              If either option is set to False,  the  driver  will  not
              ignore  the  specified axes regardless of the presence of
              other axes. This may trigger buggy  behavior  and  events
              from   this   axis   are   always  forwarded.  Users  are
              discouraged from setting this option.

       Option "Calibration" "min-x max-x min-y max-y"
              Calibrates the X and Y axes  for  devices  that  need  to
              scale  to  a different coordinate system than reported to
              the X server. This feature is required for  devices  that
              need  to  scale  to  a  different  coordinate system than
              originally reported by the  kernel  (e.g.  touchscreens).
              The  scaling  to the custom coordinate system is done in-
              driver and the X server is unaware of the transformation.
              Property: "Evdev Axis Calibration".

       Option "Mode" "Relative"|"Absolute"
              Sets  the mode of the device if device has absolute axes.
              The default value for touchpads is  relative,  for  other
              absolute.   This  option has no effect on devices without
              absolute axes.

       Option "SwapAxes" "Bool"
              Swap x/y axes. Default: off. Property: "Evdev Axes Swap".

       Option "XAxisMapping" "N1 N2"
              Specifies which buttons are mapped to  motion  in  the  X
              direction  in  wheel emulation mode.  Button number N1 is
              mapped to the negative X axis motion and button number N2
              is  mapped  to  the  positive X axis motion.  Default: no
              mapping. Property: "Evdev Wheel Emulation Axes".

       Option "YAxisMapping" "N1 N2"
              Specifies which buttons are mapped to  motion  in  the  Y
              direction  in  wheel emulation mode.  Button number N1 is
              mapped to the negative Y axis motion and button number N2
              is mapped to the positive Y axis motion.  Default: "4 5".
              Property: "Evdev Wheel Emulation Axes".

       Option "TypeName" "type""
              Specify the X Input 1.x type (see  XListInputDevices(3)).
              There  is  rarely  a  need to use this option, evdev will
              guess the device type based on the device's capabilities.
              This option is provided for devices that need quirks.

       Option "VertScrollDelta" "integer"
              The  amount  of  motion  considered one unit of scrolling
              vertically.  Default: "1".   Property:  "Evdev  Scrolling

       Option "HorizScrollDelta" "integer"
              The  amount  of  motion  considered one unit of scrolling
              horizontally.  Default: "1".  Property: "Evdev  Scrolling

       Option "DialDelta" "integer"
              The  amount  of motion considered one unit of turning the
              dial.   Default:   "1".    Property:   "Evdev   Scrolling

       Option "Resolution" "integer"
              Sets  the  resolution of the device in dots per inch. The
              resolution is used to scale relative motion  events  from
              mouse devices to 1000 DPI resolution. This can be used to
              make high resolution mice less sensitive without  turning
              off  acceleration.  If  set  to  0  no  scaling  will  be
              performed. Default: "0".


       The following properties are provided by the evdev driver.

       Evdev Axis Calibration
              4 32-bit values, order min-x, max-x, min-y,  max-y  or  0
              values to disable in-driver axis calibration.

       Evdev Axis Inversion
              2  boolean  values (8 bit, 0 or 1), order X, Y. 1 inverts
              the axis.

       Evdev Axes Swap
              1 boolean value (8 bit, 0 or 1). 1 swaps x/y axes.

       Evdev Drag Lock Buttons
              8-bit. Either 1 value or pairs  of  values.  Value  range
              0-32, 0 disables a value.

       Evdev Middle Button Emulation
              1 boolean value (8 bit, 0 or 1).

       Evdev Middle Button Timeout
              1 16-bit positive value.

       Evdev Wheel Emulation
              1 boolean value (8 bit, 0 or 1).

       Evdev Wheel Emulation Axes
              4  8-bit  values,  order  X  up,  X down, Y up, Y down. 0
              disables a value.

       Evdev Wheel Emulation Button
              1 8-bit value, allowed range 0-32, 0 disables the button.

       Evdev Wheel Emulation Inertia
              1 16-bit positive value.

       Evdev Wheel Emulation Timeout
              1 16-bit positive value.

       Evdev Scrolling Distance
              3 32-bit values: vertical, horizontal and dial.


       Kristian Høgsberg, Peter Hutterer


       Xorg(1), xorg.conf(5), Xserver(1), X(7)