Provided by: xserver-xorg-input-evdev_2.1.1-1ubuntu4_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 and keyboards.

       The  evdev  driver  can  serve  as  both a pointer and a keyboard input
       device, and may be used as both the core keyboard and the core pointer.
       Multiple  input  devices  are  supported  by multiple instances of this
       driver, with one Load directive for evdev in the Module section of your
       xorg.conf for each input device that will use this driver.


       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 "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

       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:
              on,  until  a middle mouse button event is registered. 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 "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 "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 "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  below.  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.  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 Inertia".

       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 "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 "ReopenAttempts" "integer"
              Number of reopen attempts after  a  read  error  occurs  on  the
              device  (e.g.  after  waking  up  from suspend). In between each
              attempt is a 100ms wait. Default: 10.

       Option "InvertX" "Bool"

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

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

       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.


       The following properties are provided by the evdev driver.

       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

       Evdev Wheel Emulation Inertia
              1 16-bit positive value.

       Evdev Wheel Emulation Timeout
              1 16-bit positive value.

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

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

       Evdev Axis Inversion
              2 boolean values (8 bit, 0 or 1), order  X,  Y.  1  inverts  the
              axis.  Evdev Axis Calibration 4 32-bit values, order min-x, max-
              x,  min-y,  max-y  or  0  values  to   disable   run-time   axis
              calibration.  This  feature is required for devices that need to
              scale to a different coordinate system than originally  reported
              to  the  X  server,  such  as touchscreens that require run-time

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


       Kristian Høgsberg.


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