x2vnc(1)x2vnc(1)NAMEx2vnc - a dual-screen hack
SYNOPSISx2vnc <options> host:0
[ -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 ]
DESCRIPTIONx2vnc 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.
For up-to-date information on x2vnc, see the x2vnc home page:
http://fredrik.hubbe.net/x2vnc.html
-display display
The X windows display to connect from.
-shared
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 pass‐
word. 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.
-resurface
This option will cause the trigger window to re-surface automat‐
ically 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, can‐
not 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 com‐
pletely.
-nowheel
This option does nothing and is left for backwards compatibility
only.
-wheelhack
This will make x2vnc tranlate all mouse wheel events into arrow
up/down events. Only use this if your VNC server doesn't under‐
stand mouse wheel events.
-reversewheel
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.
-navhack
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.
-trimsel
If the X selection looks like a URL, trim leading and trailing
spaces. This can be useful for pasting URLs into a browser.
-noblank
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 blank‐
ing.
-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 pass‐
word 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 factors.
-noreconnect
This option prevents x2vnc from automatically reconnecting if
the connection is closed.
-tunnel
This option makes x2vnc start an SSH tunnel to the machine being
controlled by x2vnc. The SSH command used can be changed by set‐
ting 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.
EXAMPLES
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 :;
do
x2vnc-passwd $HOME/.vncpasswd -resurface host:0
sleep 2
done
AUTHOR
Fredrik H�binette, hubbe@hubbe.net
x2vnc(1)
