Just noticed that when voreen (double buffering disabled) is running with 
vglrun 
the graphics of other 3D apps started with vglrun (e.g. itk-snap, even the 
instances started by other users) are effected (e.g. artefacts in the 
rendering, 
bg-color taken from the voreen canvas).

Is that as expected or a bug in specific for voreen over virtualGL?

On 31/01/14 22:02, DRC wrote:
> Moved the discussion temporarily to the voreen forum.  Will update this
> list once a conclusion has been reached.
>
> On 1/31/14 6:50 AM, Dr. Roman Grothausmann wrote:
>> On 31/01/14 04:02, DRC wrote:
>>> On 1/30/14 5:36 AM, Dr. Roman Grothausmann wrote:
>>>> On 29/01/14 10:30, DRC wrote:
>>>>> The bug is easily reproducible.  I am suspicious that it might have
>>>>> something to do with the application's use of FBO's, but I'm not
>>>>> entirely sure what the problem could be, as other apps that render to
>>>>> FBO's are known to work with VGL.  The application is clearly calling
>>>>> glXSwapBuffers() (via glutSwapBuffers()) to swap the back buffer to the
>>>>> front buffer, so that means it has somehow transferred the image from
>>>>> the FBO into the back buffer already, and thus VirtualGL should be
>>>>> picking up the pixels.  Obviously it isn't, but after 5 hours of poring
>>>>> over it, I have no clue.  I would suggest maybe contacting the voreen
>>>>> developers to see if they can at least shed some light on how their
>>>>> application is drawing pixels to the canvas.  That could give me a clue
>>>>> as to why it isn't working properly in VGL.


-- 
Dr. Roman Grothausmann

Tomographie und Digitale Bildverarbeitung
Tomography and Digital Image Analysis

Institut für Funktionelle und Angewandte Anatomie, OE 4120
Medizinische Hochschule Hannover
Carl-Neuberg-Str. 1
D-30625 Hannover

Tel. +49 511 532-9574

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