Hi,
I postponed this issue due to other tasks coming over.

Anyway I put here the procedure to reproduce the "extension GLX" issue. 
I've tried using TurboVNC, X forwarding and cygwin-X.

1.- Launch "runwb2" with "vglrun".
2.- The workbench opens well. In the case of TurboVNC the color depth is 
poor, but no error messages for now.
3.- Move a "Fluid flow" (i don't know if it can be reproduced with other 
components) component from the toolbox to the working area.
4.- Double click "Geometry" in the newly added component.
5.- When the "Geometry" window opens, the console output presents many 
"extension GLX is missing" messages.

Thanks!


El 31/03/2011 23:26, Nathan Kidd escribió:
> On 11-03-29 04:52 PM, DRC wrote:
>> NOTE:  that error can also be displayed when attempting to use VirtualGL
>> with an executable that is setuid root, but I can't imagine that that
>> would be the case with ANSYS.  It could be, however, that one of the
>> executables that the launcher130 script invokes is setuid root.
>>
>> I don't know if there's anything else I can do remotely.  I really need
>> to play with the application first-hand to see what it's doing.
> I got a chance to run ANSYS 13.0 on a remote system using VirtualGL
> 2.1.4 running on the Exceed onDemand 8 proxy with the GLX extension
> disabled.
>
> Some random notes but not a complete investigation:
>
> 1. Workbench (runwb2) launches fine, trace shows VGL successfully
> hooking glX functions
>
> 2. If you launch CFD-Post from Workbench you get the following error and
> a blank workspace (no GLX window)
> "
> The application has encountered an unexpected problem:
> QGLContext::makeCurrent(): Cannot make invalid context current.
> Please report this error, along with the circumstances in which it occurred.
> Alternatively, you may attempt to continue, but the application may be
> in an unstable state, and you should save your work and restart the
> application as soon as possible.
> The following information may be useful to CFX support:
> src/QtWarningHandler.cxx(49) : Expectation failed:
> QGLContext::makeCurrent(): Cannot make invalid context current.
> "
> Animator4 and ANSYS both use the QT wrapper for OpenGL and show this
> same error.  Google helpfully provides:
>
> http://cep.xor.aps.anl.gov/software/qt4-x11-4.2.2-browser/de/db4/class_q_g_l_context.html#6919d9abb1136d8e791f44bb840ada14
>
> So the source of the error is the app calls ::makeCurrent(),  which
> decides the current QGLContext has invalid GLX context (.valid == false)
>
> I noticed QT had some tracing functionality which might give enough of a
> clue to build a stand-alone QT OpenGL app that is possible to debug.
> Definitely more investigation warranted.
>
> 3. if you launch CFD-Post independently then it works fine
>
> 4. the fact that runwb2 itself uses LD_PRELOAD to force Mesa off-screen
> rendering if it doesn't detect local direct rendering suggests that the
> problem isn't LD_PRELOAD.  Maybe the issue is LD_LIBRARY_PATH getting
> killed in the exec launch.  Need to check that. (runwb2 puts
> fully-qualified paths in LD_PRELOAD)
>
> Let me know of any ideas of further things to check when I get time.
>
> -Nathan
>
>> On 3/23/11 9:23 AM, Nathan Kidd wrote:
>>> On 11-03-23 09:48 AM, r...@englobe-tec.com wrote:
>>>> When using launcher130 I get the following error, does it give any light
>>>> on the issue?
>>>>
>>>> ERROR: ld.so: object 'librrfaker.so' from LD_PRELOAD cannot be
>>>> preloaded: ignored.
>>> It means the system couldn't find librrfaker.so or couldn't find a
>>> version with the correct bit-ness (32/64).  This is a situation where
>>> your LD_DEBUG=libs log will show you exactly which paths it tried to
>>> load librrfaker.so, so you can see where the problem is.
>>>
>>> -Nathan
>>>
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