[Paraview-developers] detecting X display

[Utkarsh Ayachit]

Jean,

Can you try the attached patch and see if the output on the
server-side has any useful information that could help diagnose this?

Thanks,
Utkarsh

On Fri, Sep 19, 2014 at 5:33 AM, Favre  Jean <jfavre at cscs.ch> wrote:
> After checking out the latest changes, my server-side rendering on the Cray does not work anymore because the DISPLAY is not correctly identified.
>
> Error message is:
>
> "Display is not accessible on the server side.
> Remote rendering will be disabled."
>
> I reverted to a tag just before the fix to detect X
>
>  ad33f7548abf4b0b643e2ed15dd9ba1f8690c04f
>
> and got everything working again.
>
> P.S. I use hardware-rendering and specifically start X servers and set DISPLAYs to :0 for every job.
> -----------------
> Jean
> _______________________________________________
> Paraview-developers mailing list
> Paraview-developers at paraview.org
> http://public.kitware.com/mailman/listinfo/paraview-developers
-------------- next part --------------
diff --git a/ParaViewCore/ClientServerCore/Core/vtkProcessModule.cxx b/ParaViewCore/ClientServerCore/Core/vtkProcessModule.cxx
index 3575fcf..cbf0c75 100644
--- a/ParaViewCore/ClientServerCore/Core/vtkProcessModule.cxx
+++ b/ParaViewCore/ClientServerCore/Core/vtkProcessModule.cxx
@@ -178,6 +178,7 @@ bool vtkProcessModule::Initialize(ProcessTypes type, int &argc, char** &argv)
       {
       char *displayenv = new char[strlen(argv[i+1]) + 10];
       sprintf(displayenv, "DISPLAY=%s", argv[i+1]);
+      vtkGenericWarningMacro("Setting display from command line args as: " << displayenv);
       vtksys::SystemTools::PutEnv(displayenv);
       delete [] displayenv;
       // safe to delete since PutEnv keeps a copy of the string.
diff --git a/ParaViewCore/ClientServerCore/Rendering/vtkPVDisplayInformation.cxx b/ParaViewCore/ClientServerCore/Rendering/vtkPVDisplayInformation.cxx
index a9a2a00..1011034 100644
--- a/ParaViewCore/ClientServerCore/Rendering/vtkPVDisplayInformation.cxx
+++ b/ParaViewCore/ClientServerCore/Rendering/vtkPVDisplayInformation.cxx
@@ -19,7 +19,7 @@
 #include "vtkPVOptions.h"
 #include "vtkProcessModule.h"
 #include "vtkToolkits.h"
-
+#include "vtksys/SystemTools.hxx"
 #include "vtkRenderingOpenGLConfigure.h" // needed for VTK_USE_X
 #if defined(VTK_USE_X)
 # include <X11/Xlib.h>
@@ -50,15 +50,18 @@ void vtkPVDisplayInformation::PrintSelf(ostream& os, vtkIndent indent)
 bool vtkPVDisplayInformation::CanOpenDisplayLocally()
 {
 #if defined(VTK_USE_X)
+  vtkWarningMacro("Testing  DISPLAY=" << vtksys::SystemTools::GetEnv("DISPLAY"));
   Display* dId = XOpenDisplay((char *)NULL);
   if (dId)
     {
+    vtkWarningMacro("Success");
     XCloseDisplay(dId);
     return true;
     }
+  vtkWarningMacro("Failed");
   return false;
 #endif
-
+  vtkWarningMacro("Success by default");
   return true;
 }