Re: [VirtualGL-Users] TigerVNC + XRDP + VirtualGL with ANSYS

[DRC <dco...@us...>]

vglrun loads VirtualGL into a particular application.  This is necessary
to make OpenGL applications run properly and with hardware acceleration
in a Un*x remote display environment.  I don't have any familiarity with
xrdp, but I do know that TigerVNC has a built-in software OpenGL
implementation.  Thus, running glxgears within TigerVNC should work
without VirtualGL, although it will not be hardware-accelerated.  If you
aren't able to run glxgears in TigerVNC without VGL, then that is a
TigerVNC bug.  If you can run glxgears within TigerVNC but not TigerVNC
+ XRDP, then that is an XRDP bug.


On 9/17/16 11:39 PM, Joshua Moore wrote:
> I think I figured it out finally.
> 
> I only can get it to work using 
> 
> vglrun runwb2
> 
> Previously I had LD_LIBRARY_PATH to include
> /ansys_inc/v172/Framework/bin/Linux64/Mesa.  I think that was overriding
> some of the NVIDIA drivers or something.  
> 
> Now it runs and doesn't crash and no errors.
> 
> Why can't I get glxgears to run without  (vglrun glxgears).  Is it not
> compatible with NVIDIA's OpenGL libraries?
> 
> Thanks.
> 
> Josh
> 
> 
> 
> 
> On Sat, Sep 17, 2016 at 11:56 PM, Joshua Moore <jd...@nc...
> <mailto:jd...@nc...>> wrote:
> 
>     Hello,
> 
>     I am using Windows Remote Desktop to connect to a CentOS7.2 box with
>     a NVIDIA GeForce GT 720 graphics card.  I also have a NVIDIA Tesla
>     K40c on it as well.
> 
>     I am using TigerVNC and XRDP and then launching workbench with 
> 
>     vglrun runwb2
> 
>     Everything seems to work ok, except when I try to open "System
>     Coupling".
> 
>     Then I get
> 
>     [VGL] ERROR: in init--
>     [VGL] 218: Invalid argument
>     Exception caught in virtual
>     Ans::Graphics::Scene::EventProcessor::~EventProcessor() @line176
> 
>     Then Workbench closes immediately with no other error message
> 
>     I am very new to using VNC, and Remote Desktop to access Linux, as
>     well as even newer to OpenGL and VirtualGL.  
> 
>     Does anyone know what is going on?  Or if someone else is using
>     ANSYS and can duplicate this error?
> 
>     I have ANSYS on another machine running CentOS7.2.  It does not have
>     a NVIDIA graphics card.  Actually I'm not even sure what kind of
>     graphics card it is running, but it definitely isn't a good one.  It
>     runs just fine.  I can open ANSYS without VirtualGL just with runwb2
>     and can open System Coupling and it seems to run just fine.  I do
>     get error in the WorkbenchLog files which state that I don't have
>     hardware acceleration.
> 
>     Thanks.
> 
>     Josh
> 
> 
> 
> 
> ------------------------------------------------------------------------------
> 
> 
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