[Paraview] Mesa/Offscreen Rendering

[Utkarsh Ayachit]

Rick,

Are you simply getting the error message or it even fails to render? 
There's some issue (which I will look into hopefully soon) which results 
in that error message, but that should not affect the actual rendering.

Also just to confirm, you are using the --use-offscreen-rendering 
command line option on the server.

Utkarsh

Kent Eschenberg wrote:
> Rick,
> 
> A few months ago Utkarsh worked with me to get pvbatch to run without an 
> X server. He didn't have the time to figure out what was creating those 
> warnings. I haven't updated from CVS for a while but this sounds like 
> the same thing, only from pvserver instead of pvbatch.
> 
> We ran pvbatch with 256 nodes on an XT3 where there was not only no X 
> server but no way for it to connect back to a display. Many warnings but 
> it worked.
> 
> Kent
> Pittsburgh Supercomputing Center
> 
> Kent
> 
> Rick Angelini(CISD/CIV) wrote:
>> Is there an issue with offscreen rendering and mesa in the CVS?   I'm 
>> building Paraview from a CVS download from Monday.     I'm configuring 
>> this to run on one of our clusters that does not have GL cards and I 
>> believe that I'm building against mesa.
>>
>> When I fire up pvserver and connect back to the client, and load up 
>> some geometry (max'd out sphere, for instance), I get a number of 
>> X-windows errors on the server side, like it's trying to connect back 
>> to my display.
>>
>> Process id: 3 >> ERROR: In 
>> /build/src/ParaView-08.25.08/VTK/Rendering/vtkXOpenGLRenderWindow.cxx, 
>> line 1478
>> vtkXOpenGLRenderWindow (0xb62160): bad X server connection. 
>> DISPLAY=hpc-cluster-l7:10.0
>>
>> The HPC node does not have GL cards and is not running an X server.   
>> Other than spewing X-errors, I am getting updated GL on the client - 
>> it's just not clear to me that it's actually doing distributed SW 
>> rendering on the server side. I have a build from the last production 
>> release (3.2.1) that behaves properly ... but I didn't do that 
>> build!   8-)
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