x11vnc is a server for real X displays as described here at a definitive reference site. Does that mean it is exclusively for servers with a physical display?
Does that mean that I cannot use it for a cloud server, since normally they would not have a physical display accessible to customers?
I am getting the following error
06/12/2014 10:42:39 XOpenDisplay(":0") failed.
06/12/2014 10:42:39 Trying again with XAUTHLOCALHOSTNAME=localhost ...
06/12/2014 10:42:39 ***************************************
06/12/2014 10:42:39 *** 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.
The error is a result of applying the following:
x11vnc -safer -localhost -nopw -once -display :0
That command is the appropriate command according to this ubuntu page: VNC help, community page
The same error results from the following
x11vnc -create -safer -localhost -nopw -once -display :0
I am using Ubuntu 14.04 from a clean installation from a cloud service provider with a "desktop" added via apt-get install ubuntu-desktop in order to run applications which expect a GUI. Virtually the same software combination (Ubuntu + ubuntu-desktop + my application) worked fine with 12.04 and tightvnc but since I get a grey screen in tightvnc after switching from Ubuntu 12.04 to 14.04, I decided to try X11.
startxresults in failure and the message "no screens found".