x11vnc 설정시 , shift key 가 안먹을때.

http://blog.1day1.org/429
에서 x11vnc 로 설정하는 부분이 있다.
아래부분처럼 설정하면, shift key 가 안 먹힐것이다.

 server_args = -inetd -o /var/log/x11vnc.log -display :0 -auth /var/lib/gdm/:0.Xauth -many -bg -noxdamage -rfbauth /etc/x11vnc.passwd

 
다음처럼 바꿔주면 된다.

 server_args = -inetd -o /var/log/x11vnc.log -display :0 -auth /var/lib/gdm/:0.Xauth -xkb -repeat -many -bg -noxdamage -rfbauth /etc/x11vnc.passwd

-xkb 옵션을 넣으면 shift key 가 먹힐 것이다. 그리고, -repeat 옵션도 추가되었는데.
키보드의 키를 누르고 있으면 반복입력되는데, 기본옵션이 -norepeat 라서  반복입력이 되지 않는다.
반복입력이 필요하면 -repeat 옵션을 넣어준다.


설정후 이런 메시지가 /var/log/x11vnc.log 쪽에 남으면서 안되는 경우가 있다.

*** 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

vnc 를 띄울 적절한 X display 를 찾지 못했다. 접속할 권한? 대략 그런의미.(정확한 이해를 아직 ...)
윈도우매니저 별로 차이가 있다.  gdm , kdm , ubuntu 11.04 부터인가 바뀐 unity 도 좀 다르다. 
 

-auth /var/lib/gdm/:0.Xauth 부분이 안되는 경우이다.

ps wwwwaux | grep auth
로 넣어야 하는 값을 찾을 수 있다. 
또는 x11vnc -findauth 로 찾아본다.