hmm. Right after I sent the message, I fixed it by re-run vglserver_config. 
No idea why I need to re-run it after reboot, but now I can have 3D 
application working. 

Thanks!

On Friday, August 11, 2017 at 2:42:10 PM UTC-4, Wei Liu wrote:
>
> I recently upgrade my client side from windows 7 to windows 10, and 
> suddenly the vnc session that I created with TurboVNC stop working. Here is 
> the error that I got when running TurboVNC viewer on new Windows 10 ( the 
> TurboVNC version is 2.1.1): 
>
>
> ===== begin error =====
> ...
> QPainter::begin: Paint device returned engine == 0, type: 3
> QPainter::setPen: Painter not active
> QPainter::setFont: Painter not active
> QPainter::begin: Paint device returned engine == 0, type: 3
> QPainter::setPen: Painter not active
> QPainter::setFont: Painter not active
> QOpenGLShaderProgram: could not create shader program
> QOpenGLShader: could not create shader
> Could not link shader program:
>  ""
> [VGL] ERROR: OpenGL error 0x0502
> [VGL] ERROR: in readPixels--
> [VGL]    454: Could not Read Pixels
> ===== end of error =======
>
> Any one has seen this before? Any insights? This tool is now critical to 
> me. (I just verified that other people has same issue, so it's not my new 
> Windows 10's problem, but something on server side. I rebooted the server 
> recently)
>
> Thank you very much. 
>

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