[vtkusers] Re: Offscreen Rendering

[Miguel Angel Martin Fernandez]

Hi vtkusers!

I am having a problem with vtkOpenGLOffscreenRenderWindow, sometimes when
I compile (on a remote host using telnet) a program that uses it, i get
the following error as i try to run my program:


Xlib: connection to ":0.0" refused by server Xlib: Invalid
MIT-MAGIC-COOKIE-1 key
 
ERROR: In vtkOpenGLOffscreenRenderWindow.cxx, line 683
vtkOpenGLOffscreenRenderWindow (0x807f478): bad X server connection.
 
p1_27512:  p4_error: interrupt SIGSEGV: 11 rm_l_1_27513:  p4_error:
interrupt SIGINT: 2 p0_22175: (2.142237) Trying to receive a message when
there are no connections; Bailing out


The cxx code line involved in this error is:  

  if (!this->DisplayId) {
    this->DisplayId = XOpenDisplay(":0"); 
    if (this->DisplayId == NULL) {
      vtkErrorMacro(<< "bad X server connection.\n");
    }



However, if I compile the program while I am fisically in front of the
computer (not using telnet) then everything works OK, and  i don't get any
erorrs even if i then run it using telnet. 

Maybe when I am actually sitting by the computer, then this->DisplayId
does exist, and therefore it doesn't enter that "if"??

Any ideas on how to fix this without having to run around the lab will be
definitely welcome!!!   


Thank you very much in advance


			Diego Hernando