VMD-L Mailing List

From: John Stone (johns_at_ks.uiuc.edu)
Date: Wed Feb 23 2005 - 16:33:17 CST

Dallas,
  Just to make sure I've got it straight:
* VMDSIMPLEGRAPHICS works with no seg falt

* VMD_EXCL_GL_EXTENSIONS with the huge list of extensions
  but no VMDSIMPLEGRAPHICS crashes.

If this is correct, then the ATI driver is crashing early
on when VMD is creating the OpenGL window, either when requesting
multisample antialiasing, stereo, stencil buffers, or one of the
other advanced OpenGL features. The VMDSIMPLEGRAPHICS variable
disables all of those, so if that allows it to run, that means
it's something during the window creation that's killing you.

  John

On Thu, Feb 24, 2005 at 09:23:33AM +1100, Dallas Warren wrote:
> John,
>
> > So from what you sent below, it looks like your ATI card runs ok
> >when VMD doesn't ask for any OpenGL extensions. Next thing to try
> >on this card is:
> > unsetenv VMDSIMPLEGRAPHICS
> > setenv VMD_EXCL_GL_EXTENSIONS "GL_ARB_multisample GL_SGIS_multisample
> >GL_ARB_multitexture GL_ARB_texture_non_power_of_two
> >GL_EXT_multi_draw_arrays GL_ARB_shading_language_100
> >GL_ARB_shader_objects GL_ARB_vertex_shader GL_ARB_fragment_shader
> >GL_ARB_point_sprite GL_SUN_mesh_array GL_EXT_compiled_vertex_array
> >GL_SUN_read_video_pixels GL_SUN_global_alpha GL_ARB_point_parameters"
> >Try setting that environment variable, then run VMD again and let me know
> >if it survives or not. From there, we can figure out which OpenGL
> >extension
> >or feature is causing the ATI driver to go wacko.
>
> Segmentation fault again.
>
> Do I go through a remove one of those GL options at a time?
>
> Catch ya,
>
> Dr. Dallas Warren
> Lecturer
> Department of Pharmaceutical Biology and Pharmacology
> Victorian College of Pharmacy, Monash University
> 381 Royal Parade, Parkville VIC 3010
> dallas.warren_at_vcp.monash.edu.au
> +61 3 9903 9083
> --------------------------------------------------------------------------
> When the only tool you own is a hammer, every problem begins to resemble a
> nail. 

-- 
NIH Resource for Macromolecular Modeling and Bioinformatics
Beckman Institute for Advanced Science and Technology
University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
Email: johns_at_ks.uiuc.edu                 Phone: 217-244-3349              
  WWW: http://www.ks.uiuc.edu/~johns/      Fax: 217-244-6078