Re: Fix for segmentation fault in stage with intel graphic boards

Daniel Dube wrote:

> Hi,
> 
> we had the reproducible problem, that stage crashed on four of five
> startups just after the simulation window appears. We noticed this problem
> on several Ubuntu 9.10 machines with attached intel graphic hardware. We
> tested the trunk and 3.2.2 version with the same result. The problem did
> not occur on machines with NVIDIA graphic boards.

This was driving me nuts in a similar setup, thanks for pinning it down!

> It seems that if Canvas::Resize() is called rather than Canvas::InitGl(),
> the intel driver produces a segmentation fault in the function
> glLoadIdentity() called by Canvas::FixViewport().
> 
> The following patch should fix this problem:
> 
> --- libstage/canvas.cc	(Revision 8612)
> +++ libstage/canvas.cc	(Arbeitskopie)
> @@ -1285,6 +1285,7 @@
>   void Canvas::resize(int X,int Y,int W,int H)
>   {
>     Fl_Gl_Window::resize(X,Y,W,H);
> -  FixViewport(W,H);
> +  if ( init_done )
> +	  FixViewport(W,H);
>     invalidate();
>   }
> 
> 
> Regards
> Daniel
> 
> 
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------------------------------------------------------------------------------
Download Intel® Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev