Provided by: x2vnc_1.7.2-3_amd64 bug


       x2vnc - a dual-screen hack


       x2vnc <options> <host>:<display#>
       x2vnc <options> -listen [<display#>]
       [ -display display ]
       [ -version ]
       [ -shared ]
       [ -north ] [ -south ] [ -east ] [ -west ]
       [ -hotkey key ]
       [ -passwdfile passwd-file ]
       [ -resurface ]
       [ -edgewidth width ]
       [ -desktop desktop-number ]
       [ -timeout seconds ]
       [ -wheelhack ]
       [ -nowheel ]
       [ -reversewheel ]
       [ -scrolllines lines ]
       [ -navhack ]
       [ -mac ]
       [ -trimsel ]
       [ -noblank ]
       [ -lockdelay seconds ]
       [ -debug ]
       [ -accel multiplier ]
       [ -noreconnect ]
       [ -tunnel ]
       [ -via host ]


       x2vnc will let you use two screens on two different computers as if they were connected to
       the same computer. The computer with the 'main' keyboard must be running X-window, and the
       second  computer  should  have  a VNC server running which will update the contents on the
       actual screen. This means Xvnc is not suitable, but WinVNC is.

       In listen mode ( -listen option specified ) x2vnc will wait for a connection  from  a  VNC
       server  on ports 5400 and 5500 (plus the optional display# value) instead of connecting to
       a specified VNC server.

       For    up-to-date    information    on    x2vnc,    see    the    x2vnc     home     page:

       -display display
              The X windows display to connect from.

              Allow multiple connections to the same VNC server.

       -north, -south, -east, -west,
              Determine which edge leads to the other screen.

       -passwdfile password-file
              With  this  option  you  can  start  x2vnc without entering a password. The file is
              created by vncpasswd which comes with the X-windows VNC software.  If the file does
              not exist, x2vnc will ask for a password and create the file.

              This  option  will  cause  the  trigger window to re-surface automatically if it is
              covered up by another window.

       -hotkey key
              This option allows you to select which key to use to warp the pointer to  and  from
              second  computer. The default is "Control-F12", any combination of modifiers can be
              used, such as "shift-alt-meta-ctrl-F1" (or s-a-m-c-F1).

       -edgewidth pixels
              This is a workaround for some X servers which do not allow the mouse to go all  the
              way  to  the edge of the screen. By setting this to 2 or greater, the mouse will be
              able to reach the x2vnc window and thus warp to the windows  machine.  The  default
              value  is  1.  If you set this value to 0, no border will be generated, which means
              you will have to use hotkeys to switch to the oher screen.

       -desktop desktop-number
              With this option, you can make x2vnc non-sticky. This may not work with all window-
              managers.  Note  that  the  first desktop is usually 0 (zero). If you want x2vnc to
              appear on the last (rightmost) desktop, use -1.  This option was especially created
              with the sawfish edgeflipping in mind, normally you would use "-west -desktop 0" or
              "-east -destkop -1" with Sawfish to allow edgeflipping to work normally.

       -timeout seconds
              This options tells x2vnc how long to wait before warping the cursor back to  the  X
              screen  if  there  is  no activity. The reason for this is that some screen savers,
              such as xscreensaver, cannot activate while x2vnc is in control of the cursor.  The
              default  value  is  590  seconds,  which is equivalent to 9 minutes and 50 seconds.
              Using a value of 0 will disable timeouts completely.

              This option does nothing and is left for backwards compatibility only.

              This will make x2vnc tranlate all mouse wheel events  into  arrow  up/down  events.
              Only use this if your VNC server doesn't understand mouse wheel events.

              Invert  the up/down direction of the mouse wheel emulation.  This option only works
              if -wheelhack is used.

       -scrolllines lines
              When using mouse wheel emulation, this selects how many up/down events will be sent
              for each tick of the mouse wheel.

              This  will  map  button  6  &  7 to Alt+Left/Right, which will allow the navigation
              buttons on some mice to behave more like they do in windows.

       -mac   Macintosh specific mode, maps second mouse button to control-mouseclick.

              If the X selection looks like a URL, trim leading and trailing spaces.  This can be
              useful for pasting URLs into a browser.

              Prevent  screen  blanking  on the remote desktop while you are working on the local
              desktop. Requires the MIT-SCREEN-SAVER or XIDLE  extension  to  work  properly.  If
              neither  of  these  extensions  are present, the remote desktop will always be kept
              from blanking.

       -lockdelay seconds
              This is only meaningful when  using  the  -noblank  option.  When  this  option  is
              present.  With  this option, x2vnc will not attempt to wake up the remote screen if
              you have been idle for more than the specified amount of time. This  is  useful  if
              you  need  a password to unlock the remote screen and would rather leave it blanked
              until you need it.

       -debug This option will make x2vnc  print  out  information  about  events  it  sends  and
              receives to stderr for debugging purposes.

       -accel multiplier
              This  option allows you to control the speed of the mouse on the remote screen. 2.0
              means twice as fast, 0.5 means half as fast.  Default is 1.0.  Note  that  this  is
              multiplied  with  a  number  which x2vnc calculates based on screen sizes and other

              This option prevents x2vnc from automatically reconnecting  if  the  connection  is

              This  option  makes  x2vnc  start  an SSH tunnel to the machine being controlled by
              x2vnc. The SSH command used can be changed by setting the X2VNC_SSH_CMD environment
              variable. The default is:
              ssh -A -X -f -L "$LOCALPORT:$REMOTEHOST:$REMOTEPORT" \
              "$GATEWAYHOST" 'ssh-add;sleep 60'

       -via host
              This  is  similar to -tunnel, but tunnels through a host different than the machine
              being controlled by x2vnc.


       Most common usage:
       x2vnc -passwdfile $HOME/.vncpasswd -resurface host:0

       To make x2vnc start (and re-start) automatically, add the following to your your X startup
       file (usually .xinitrc):
        while :;
         x2vnc -passwd $HOME/.vncpasswd -resurface host:0
         sleep 2


       Fredrik Hübinette,