[vtkusers] VTK MPI with SSH Display problem

[Juerg Tschirren]

I never used the MPI option with VTK, but I do run VTK on a remote machine
through an SSH connection. It looks like you didn't do one or both of the
following two steps:

  If your application runs on machine A and wants to display something on
machine B, then you have to:

  1. on machine A type

     export DISPLAY=B:0.0

     assuming you are using the Bash shell. B has to be the valid
     network name of machine B, or its IP address.

  2. on machine B type

     xhost + A

     in order to allow machine A to do an X connection to B. Again, A
     hast to be a valid network name (resolvable by DNS) or an IP address.

Hope that helps

Juerg


On Wed, 18 Jul 2001, Simon Winberg wrote:

> Hi all,
>
> I've got VTK compiled with the MPI option, and am testing the
> ParallelIso program. I'm using ssh with the ssh-agent to connect to the
> other PC's.
>
> When I execute the program (using the lamexec command) the
> application runs for a few seconds and then crashes (see output
> below). I can run the application fine on one PC simulating multiple
> processors, but when I add any of the other PCs in my cluster I get this
> error:
>
> --------
> $ lamexec -np 3 ParallelIso
>
> Update 3000 took 0.531551 seconds to produce 68 triangles
> Update 1750 took 0.828511 seconds to produce 88310 triangles
> Update 500 took 0.738054 seconds to produce 64982 triangles
> Update 3000 took 2.94585 seconds to produce 68 triangles
> ERROR: In vtkXRenderWindow.cxx, line 176
> vtkMesaRenderWindow (0x8235550): bad X server connection.
>
> ERROR: In vtkMesaRenderWindow.cxx, line 122
> vtkMesaRenderWindow (0x8235550): bad X server connection.
> --------
>
> I have tried the other example programs with similar results.
> Could this be a problem with how ssh handles exporting of the display?
>
> Any ideas?
>
>
>
>
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