[vtkusers] connection to ":0.0" refused by server

[Tom G. Smith (Smitty)]

As I said in my original post (see below) I have no trouble running
any other X client in this environment.  I'd already tried
"xhost +myhost" but as a last resort; I wouldn't have expected it to
make any difference.  My display is -

  bash-2.05a$ echo $DISPLAY
  myhost:11.0

*not* ":0.0".  Perhaps the real question should be, why is vtk partially
ignoring my $DISPLAY value?  Ssh is listening on port 11 on myhost.
It captures all of the X Client output, sending it back to my real
host in its own encrypted tunnel.
BTW, I tried this -

  export TCLLIBPATH=/contrib/vtk/VTK/Wrapping/Tcl
  vtk -display $DISPLAY \
  /contrib/vtk/VTK/Examples/Modelling/Tcl/hello.tcl

which gives me a grey-filled window labeled "vtk," no "Hello" graphic,
no interaction, nada, and the only way I've found to get rid of it
is to press Ctrl-C.  If I leave off the -display -

  export TCLLIBPATH=/contrib/vtk/VTK/Wrapping/Tcl
  vtk /contrib/vtk/VTK/Examples/Modelling/Tcl/hello.tcl

I get the "Hello" graphic, and I can interact with it, rotating,
zooming, etc, just like I can with VTK 3.2.  But I get this message
at startup (Note that :0.0 is *NOT* my $DISPLAY value) -

  Xlib: connection to ":0.0" refused by server
  Xlib: No protocol specified

and when I press "q" to exit, I get a segmentation fault.

On Thu, 24 Oct 2002, John Balster wrote:
> >I get the "Hello" graphic, and I can interact with it (rotate, zoom, etc.).
> >But I also get this error:
> >
> >   Xlib: connection to ":0.0" refused by server
> >   Xlib: No protocol specified
>
> Did you execute an xhost command on the computer you are trying to open
> the display on to tell it to allow windows to be opened?  This has to be
> done even if it's on the same machine that's running VtK.  For instance,
> if your machine is called kcc, you would use "xhost + kcc" to tell it to
> allow windows from kcc.  From a security point of view, I don't recommend
> using "xhost +" as that would open up windows creation to any computer in
> the world.
>
> John

Original post to vtkusers at public.kitware.com:
>From smitty at random.kcc.com Thu Oct 24 12:09:29 2002
Date: Thu, 24 Oct 2002 12:08:23 -0500 (CDT)
From: "Tom G. Smith (Smitty)" <smitty at random.kcc.com>
To: vtk mailing list <vtkusers at public.kitware.com>
Cc: Chris Pieper <Chris.Pieper at kcc.com>
Subject: connection to ":0.0" refused by server

Hello vtkusers at public.kitware.com,

I got past the initial error (GLX missing, see attached (BTW the
responses from vtkusers were underwhelming :-)) by upgrading to Exceed
3D 7.1, but now when I do -

  export TCLLIBPATH=/contrib/vtk/VTK/Wrapping/Tcl
  vtk /contrib/vtk/VTK/Examples/Modelling/Tcl/hello.tcl

I get the "Hello" graphic, and I can interact with it (rotate, zoom, etc.).
But I also get this error:

  Xlib: connection to ":0.0" refused by server
  Xlib: No protocol specified

and when I press "q" to quit, I get a segmentation fault.  I'm running
this remotely via ssh, and my $DISPLAY is set to -

  bash-2.05a$ echo $DISPLAY
  myhost:11.0

I have no trouble running other X Clients (xterm, xclock, xeyes, MATLAB, etc.)
so I don't believe it's my X Configuration causing this.


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