x11vnc xopendisplay failed

Question

I installed x11vnc and then execute x11vnc but failed following is the error message ``` $x11vnc -display :0 08/05/2017 19:18:22 x11vnc version: 0.9.13 lastmod: 2011-08-10 pid: 7572 08/05/2017 19:18:22 XOpenDisplay(":0") failed. 08/05/2017 19:18:22 Trying again with XAUTHLOCALHOSTNAME=localhost ... 08/05/2017 19:18:22 *************************************** 08/05/2017 19:18:22 *** 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. ``` How can I address the error? || I don't know if followings are helpful but I hope so ``` $ps wwwaux | grep auth root 5276 0.0 0.0 119472 8532 tty7 Ss+ 18:26 0:00 /usr/lib/xorg/Xorg -core :1 -seat seat0 -auth /var/run/lightdm/root/:1 -nolisten tcp vt7 -novtswitch user1 7731 0.0 0.0 15504 1016 pts/3 S+ 19:21 0:00 grep --color=auto auth user2 25420 0.0 0.0 115960 17532 ? S 4월26 0:13 Xvnc4 :10000 -desktop quad:10000 (user2) -auth /home/u…

Accepted Answer

/usr/lib/xorg/Xorg -core :1

Your X is running on :1 display, so you need to tell x11vnc that:

$ x11vnc -display :1

I think you can also do -find to try to find the user's display automatically.

x11vnc xopendisplay failed

Solution

Problem