[Lubuntu 13.10] x11vnc and UltraVNC

B

balubeto

Guest
Hi

In Windows 7 SP1 64-bit, I use UltraVNC viewer 1.1.9.6 64-bit with the SecureVNCPlugin64.dsm plugin.

Now, I have a computer with Lubuntu 13.10 32 bit that it has installed the x11vnc server.

How can I configure the VNC server so that I can remotely control this Linux machine completely, including its Desktop Manager LightDM?

Thanks

Bye
 


Hi
From Linux, I wrote from the terminal:
sudo x11vnc -storepasswd /etc/x11vnc.pass
Click to expand...
and then I created in the /etc/init directory the x11vnc.conf file and I wrote:
start on login-session-start
script
/usr/bin/x11vnc -xkb -auth /var/run/lightdm/root/:0 -noxrecord -noxfixes -noxdamage -rfbauth /etc/x11vnc.pass -forever -bg -rfbport 5900 -o /var/log/x11vnc.log
end script
Click to expand...
but when I restarted the computer, I tried to connect with UltraVNC without the SecureVNCPlugin64.dsm plugin but the x11vnc server does not respond and it does not even create the log file. Where am I wrong?
Thanks
Bye
 
Running this command from the terminal with the sudo command because there is the -o option, I get:
25/03/2014 18:30:24 passing arg to libvncserver: -rfbauth
25/03/2014 18:30:24 passing arg to libvncserver: /etc/x11vnc.pass
25/03/2014 18:30:24 passing arg to libvncserver: -rfbport
25/03/2014 18:30:24 passing arg to libvncserver: 5900
25/03/2014 18:30:24 x11vnc version: 0.9.13 lastmod: 2011-08-10 pid: 2733
No protocol specified
25/03/2014 18:30:24 XOpenDisplay(":0") failed.
25/03/2014 18:30:24 Trying again with XAUTHLOCALHOSTNAME=localhost ...
No protocol specified
25/03/2014 18:30:24 ***************************************
25/03/2014 18:30:24 *** XOpenDisplay failed :)0)
*** x11vnc was unable to open the X DISPLAY: ":0", it cannot continue.
*** There may be "Xlib:" error messages above with details about the failure.
Some tips and guidelines:
** An X server (the one you wish to view) must be running before x11vnc is
started: x11vnc does not start the X server. (however, see the -create
option if that is what you really want).
** You must use -display <disp>, -OR- set and export your $DISPLAY
environment variable to refer to the display of the desired X server.
- Usually the display is simply ":0" (in fact x11vnc uses this if you forget
to specify it), but in some multi-user situations it could be ":1", ":2",
or even ":137". Ask your administrator or a guru if you are having
difficulty determining what your X DISPLAY is.
** Next, you need to have sufficient permissions (Xauthority)
to connect to the X DISPLAY. Here are some Tips:
- Often, you just need to run x11vnc as the user logged into the X session.
So make sure to be that user when you type x11vnc.
- Being root is usually not enough because the incorrect MIT-MAGIC-COOKIE
file may be accessed. The cookie file contains the secret key that
allows x11vnc to connect to the desired X DISPLAY.
- You can explicitly indicate which MIT-MAGIC-COOKIE file should be used
by the -auth option, e.g.:
x11vnc -auth /home/someuser/.Xauthority -display :0
x11vnc -auth /tmp/.gdmzndVlR -display :0
you must have read permission for the auth file.
See also '-auth guess' and '-findauth' discussed below.
** If NO ONE is logged into an X session yet, but there is a greeter login
program like "gdm", "kdm", "xdm", or "dtlogin" running, you will need
to find and use the raw display manager MIT-MAGIC-COOKIE file.
Some examples for various display managers:
gdm: -auth /var/gdm/:0.Xauth
-auth /var/lib/gdm/:0.Xauth
kdm: -auth /var/lib/kdm/A:0-crWk72
-auth /var/run/xauth/A:0-crWk72
xdm: -auth /var/lib/xdm/authdir/authfiles/A:0-XQvaJk
dtlogin: -auth /var/dt/A:0-UgaaXa
Sometimes the command "ps wwwwaux | grep auth" can reveal the file location.
Starting with x11vnc 0.9.9 you can have it try to guess by using:
-auth guess
(see also the x11vnc -findauth option.)
Only root will have read permission for the file, and so x11vnc must be run
as root (or copy it). The random characters in the filenames will of course
change and the directory the cookie file resides in is system dependent.
See also: http://www.karlrunge.com/x11vnc/faq.html
Click to expand...
So, how do I fix this?
Thanks
Bye
 
Leaving the /etc/init/x11vnc.conf file and restarting the computer, I notice that the /var/run/lightdm/root/:0 file is created, but when I run the command sudo netstat -anp | grep 5900 or sudo netstat -nlp | grep vnc or sudo ps -ef | grep [x]11vnc , nothing is displayed.
So, I run from the terminal the command sudo /usr/bin/x11vnc -xkb -auth /var/run/lightdm/root/:0 -noxrecord -noxfixes -noxdamage -rfbauth /etc/x11vnc.pass -forever -rfbport 5900 -bg -o /var/log/x11vnc.log, the file /var/run/lightdm/root/:0 is created but the other commands always give the same result.
So, I rebooted the computer and gave the command sudo /usr/bin/x11vnc -auth /var/run/lightdm/root/:0 -display :0 but the same log file is displayed.
How come?
Thanks
Bye
 
Also, I tried to do this method:
I activated the xauth_path directive in the /etc/lxdm/default.conf (pointing to the /etc/alternatives/lxdm.conf), I run the command sudo x11vnc -storepasswd <Password> /etc/x11vnc.pass to create a password for access remotely to x11vnc and I created the /etc/lxdm/LoginReady like this:
/bin/sh
#X11vnc AutoStart
sudo x11vnc -auth /tmp/.Xauth1000 -forever rfbauth /etc/x11vnc.pass -rfbport 5900 -o /var/log/x11vnc.log
Click to expand...
Then I made it executable by writing sudo chmod u+x /etc/lxdm/LoginReady and I restarted the computer.
Unfortunately I still can not connect from remote because when I try to do it, UltraVNC viewer can not find the Server.
Also, I noticed that the log file is not created and the process x11vnc is not active.
So, how should I do to fix this?
Thanks
Bye
PS: I noticed that even if I run the command sudo x11vnc -auth /tmp/.Xauth1000 -forever -rfbauth /etc/x11vnc.pass -rfbport 5900 -o /var/log/x11vnc.log does not work but the log file is created but it is always the same.
 
I noticed that with the command:
Code: 
sudo x11vnc -o /var/log/x11vnc.log -rfbauth /etc/x11vnc.pass -rfbport 5900 -shared -forever -nowf -norc -notruecolor -bg -xkb
I can, with UltraVNC, to make remote control of the current session of Lubuntu 13.10. So to be able to control even LightDM, how should I do to get the file that the auth option of x11vnc want? Where should I put this command?
Thanks
Bye
 
I tried to edit the file /etc/lightdm/lightdm.conf in this way:

Code: 
[SeatDefaults]
greeter-session=lightdm-gtk-greeter
user-session=Lubuntu
display-setup-script=/usr/bin/x11vnc -auth /var/run/lightdm/root/:0 -rfbauth /etc/x11vnc.pass -xkb -noxrecord -noxfixes -noxdamage -forever -bg -rfbport 5900

and it works.

Now, there is the problem of mapping of characters and I already tried to replace the xkb option with the noxkb option but the problem remains:

The Windows computer is mapped to the English-United States (EN) keyboard and the computer with Lubuntu has the Italian-Italian (IT) mapping. Now, doing the remote control from the Windows computer to the Linux computer and setting the keyboard mapping of this latter computer to the English (US) keyboard layout, I see that some characters =, -, +, ..., typed by Windows computer, are reproduced on the Linux machine with the characters ), /,] ... . How come? I also checked directly,, connecting a keyboard to the Linux computer, and I noticed that this problem does not exist even if I change the keyboard layout.

So, how do I solve this mapping problem caused by the remote control?

Thanks

Bye
 
I created this script:

Code: 
#! /bin/sh
#
### BEGIN INIT INFO
# Provides: x11vnc
# Required-Start: $syslog $local_fs
# Required-Stop: $syslog $local_fs
# Should-Start: LightDM
# Default-Start: 2
# Default-Stop: 1
# Short-Description: x11 vnc
# Description: x11vnc
### END INIT INFO
DAEMON=/usr/bin/x11vnc
NAME=x11vnc
DESC="X11 vnc"
test -x $DAEMON || exit 0
DAEMON_OPTS="-auth /var/run/lightdm/root/:0 -rfbauth /etc/x11vnc.pass -nomodtweak -shared -forever -o /var/log/x11vnc.log -bg"
set -e
case "$1" in
  start)
  echo -n "Starting $DESC: "
  start-stop-daemon --start --quiet --pidfile /var/run/$NAME.pid \
  --exec $DAEMON -- $DAEMON_OPTS &
  echo "$NAME."
  ;;
  stop)
  echo -n "Stopping $DESC: "
  start-stop-daemon --stop --oknodo --quiet --pidfile /var/run/$NAME.pid \
  --exec $DAEMON
  echo "$NAME."
  ;;
  restart)
  echo -n "Restarting $DESC: "
  start-stop-daemon --stop --quiet --pidfile \
  /var/run/$NAME.pid --exec $DAEMON
  sleep 1
  start-stop-daemon --start --quiet --pidfile \
  /var/run/$NAME.pid --exec $DAEMON -- $DAEMON_OPTS
  echo "$NAME."
  ;;
  status)
  if [ -s /var/run/$NAME.pid ]; then
  RUNNING=$(cat /var/run/$NAME.pid)
  if [ -d /proc/$RUNNING ]; then
  if [ $(readlink /proc/$RUNNING/exe) = $DAEMON ]; then
  echo "$NAME is running."
  exit 0
  fi
  fi
  # No such PID, or executables don't match
  echo "$NAME is not running, but pidfile existed."
  rm /var/run/$NAME.pid
  exit 1
  else
  rm -f /var/run/$NAME.pid
  echo "$NAME not running."
  exit 1
  fi
  ;;
  *)
  N=/etc/init.d/$NAME
  echo "Usage: $N {start|stop|restart|force-reload}" >&2
  exit 1
  ;;
esac
exit 0
and I saved in /etc/init.d/x11vnc and, apparently, it works and I can also control the LightDM.

Now, how do I fix the problems with the remote keyboard? Now, I realized that, when a VNC client is connected, the repeat function on the keyboard of the host (and the client on the host) is automatically deactivated and it is restored when VNC clients are disconnected.

For example, under normal conditions, when I hold down a key on the host, its input is repeated until I it release; while, when a VNC client is connected, this repeat function the key does not more work.

How come?

Thanks

Bye
 
Using this script:
Code: 
#! /bin/sh
#
### BEGIN INIT INFO
# Provides: x11vnc
# Required-Start: $syslog $local_fs
# Required-Stop: $syslog $local_fs
# Should-Start: LightDM
# Default-Start: 2
# Default-Stop: 1
# Short-Description: x11 vnc
# Description: x11vnc
### END INIT INFO
DAEMON=/usr/bin/x11vnc
NAME=x11vnc
DESC="X11 vnc"
test -x $DAEMON || exit 0
DAEMON_OPTS="-auth /var/run/lightdm/root/:0 -rfbauth /etc/x11vnc.pass -noxkb -modtweak -capslock -repeat -flashcmap -shared -forever -o /var/log/x11vnc.log -bg"
set -e
 case "$1" in
  start)
  echo -n "Starting $DESC: "
  export XKL_XMODMAP_DISABLE=1
  start-stop-daemon --start --quiet --pidfile /var/run/$NAME.pid \
  --exec $DAEMON -- $DAEMON_OPTS &
  echo "$NAME."
  ;;
  stop)
  export XKL_XMODMAP_DISABLE=0
  echo -n "Stopping $DESC: "
  start-stop-daemon --stop --oknodo --quiet --pidfile /var/run/$NAME.pid \
  --exec $DAEMON
  echo "$NAME."
  ;;
  restart)
  export XKL_XMODMAP_DISABLE=1
  echo -n "Restarting $DESC: "
  start-stop-daemon --stop --quiet --pidfile \
  /var/run/$NAME.pid --exec $DAEMON
  sleep 1
  start-stop-daemon --start --quiet --pidfile \
  /var/run/$NAME.pid --exec $DAEMON -- $DAEMON_OPTS
  echo "$NAME."
  ;;
  status)
  if [ -s /var/run/$NAME.pid ]; then
  RUNNING=$(cat /var/run/$NAME.pid)
  if [ -d /proc/$RUNNING ]; then
  if [ $(readlink /proc/$RUNNING/exe) = $DAEMON ]; then
  echo "$NAME is running."
  exit 0
  fi
  fi
  # No such PID, or executables don't match
  echo "$NAME is not running, but pidfile existed."
  rm /var/run/$NAME.pid
  exit 1
  else
  rm -f /var/run/$NAME.pid
  echo "$NAME not running."
  exit 1
  fi
  ;;
  *)
  N=/etc/init.d/$NAME
  echo "Usage: $N {start|stop|restart|force-reload}" >&2
  exit 1
  ;;
 esac
exit 0

I can, remotely, to have a U.S keyboard layout (Linux notation) except the > symbol. That is, when I press a Shift+> symbol, a <[/ i] symbol appears. In other words, remotely, I have two symbols <[/ i]. How come? How do I solve it?

I remind you that the keyboard layout of Windows is English-United States (EN); while that of the Linux keyboard is Italian-Italian.

Thanks

Bye
 
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