VMD-L Mailing List

From: John Stone (johns_at_ks.uiuc.edu)
Date: Mon Sep 10 2007 - 10:32:37 CDT

Hi,
  It appears you have a GeForce 5500 card. The newest version of VMD
requires cards that support the full GLSL spec, including the use of
the gl_FrontFacing attribute. I'm guessing that your 5500 card/driver
isn't providing the gl_FrontFacing attribute because it is an older
generation card. You could either upgrade your card/driver to something
newer, or you could use a modified version of the VMD GLSL shaders that
will use an approximate/almost-correct workaround for older cards that
lack this feature. Given the low cost of GPUs these days, I'd suggest
getting a newer card like a 6800,7800, or 8800 which will also give you
a significant speed boost.

Cheers,
  John Stone
  vmd_at_ks.uiuc.edu

On Mon, Sep 10, 2007 at 09:04:48PM +0900, Roland Schmucki wrote:
> Hi!
>
> I would like to use "GLSL rendering mode" but it seems that the settings
> are not alright.
> How to set the environment variable VMDGLSLVERBOSE to get more information?
>
> Here is the output when starting VMD:
> Info) VMD for LINUX, version 1.8.6 (April 6, 2007)
> Info) Multithreading available, 2 CPUs detected.
> Info) Free system memory: 1222MB (60%)
> Info) OpenGL renderer: GeForce FX 5500/AGP/SSE2
> Info) Features: STENCIL MSAA(4) MDE CVA MTX PP PS GLSL(OVF)
> Warning) GPU driver failed to compile shader:
> Warning) /home/roland/VMD/LIB/shaders/vmd
> Warning) This GPU/driver is buggy, or doesn't fully implement GLSL.
> Warning) Set environment variable VMDGLSLVERBOSE for more info.
> Info) GLSL rendering mode is NOT available.
> Info) Textures: 2-D (4096x4096), 3-D (512x512x512), Multitexture (4)
>
> And the some of the output of "glxinfo":
> name of display: :0.0
> display: :0 screen: 0
> direct rendering: Yes
> server glx vendor string: NVIDIA Corporation
> server glx version string: 1.4
> server glx extensions:
> GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig,
> GLX_SGIX_pbuffer, GLX_SGI_video_sync, GLX_SGI_swap_control,
> GLX_EXT_texture_from_pixmap, GLX_ARB_multisample, GLX_NV_float_buffer
> client glx vendor string: NVIDIA Corporation
> client glx version string: 1.4
> client glx extensions:
> GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_visual_info,
> GLX_EXT_visual_rating, GLX_EXT_import_context, GLX_SGI_video_sync,
> GLX_NV_swap_group, GLX_NV_video_out, GLX_SGIX_fbconfig,
> GLX_SGIX_pbuffer,
> GLX_SGI_swap_control, GLX_NV_float_buffer, GLX_ARB_fbconfig_float,
> GLX_EXT_fbconfig_packed_float, GLX_EXT_texture_from_pixmap,
> GLX_EXT_framebuffer_sRGB
> GLX version: 1.3
> GLX extensions:
> GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig,
> GLX_SGIX_pbuffer, GLX_SGI_video_sync, GLX_SGI_swap_control,
> GLX_EXT_texture_from_pixmap, GLX_ARB_multisample, GLX_NV_float_buffer,
> GLX_ARB_get_proc_address
> OpenGL vendor string: NVIDIA Corporation
> OpenGL renderer string: GeForce FX 5500/AGP/SSE2
> OpenGL version string: 2.1.1 NVIDIA 100.14.11
> OpenGL extensions:
> GL_ARB_depth_texture, GL_ARB_fragment_program,
> GL_ARB_fragment_program_shadow, GL_ARB_fragment_shader,
> GL_ARB_half_float_pixel, GL_ARB_imaging, GL_ARB_multisample,
> GL_ARB_multitexture, GL_ARB_occlusion_query,
> GL_ARB_pixel_buffer_object,
> GL_ARB_point_parameters, GL_ARB_point_sprite, GL_ARB_shadow,
> GL_ARB_shader_objects, GL_ARB_shading_language_100,
> GL_ARB_texture_border_clamp, GL_ARB_texture_compression,
> GL_ARB_texture_cube_map, GL_ARB_texture_env_add,
> GL_ARB_texture_env_combine, GL_ARB_texture_env_dot3,
> GL_ARB_texture_mirrored_repeat, GL_ARB_texture_rectangle,
> GL_ARB_transpose_matrix, GL_ARB_vertex_buffer_object,
> GL_ARB_vertex_program, GL_ARB_vertex_shader, GL_ARB_window_pos,
> GL_S3_s3tc, GL_EXT_texture_env_add, GL_EXT_abgr, GL_EXT_bgra,
> GL_EXT_blend_color, GL_EXT_blend_func_separate, GL_EXT_blend_minmax,
> GL_EXT_blend_subtract, GL_EXT_compiled_vertex_array, GL_EXT_Cg_shader,
> GL_EXT_draw_range_elements, GL_EXT_fog_coord, GL_EXT_framebuffer_blit,
> GL_EXT_framebuffer_multisample, GL_EXT_framebuffer_object,
> GL_EXT_gpu_program_parameters, GL_EXT_multi_draw_arrays,
> GL_EXT_packed_depth_stencil, GL_EXT_packed_pixels,
> GL_EXT_paletted_texture, GL_EXT_pixel_buffer_object,
> GL_EXT_point_parameters, GL_EXT_rescale_normal, GL_EXT_secondary_color,
> GL_EXT_separate_specular_color, GL_EXT_shadow_funcs,
> GL_EXT_shared_texture_palette, GL_EXT_stencil_two_side,
> GL_EXT_stencil_wrap, GL_EXT_texture3D, GL_EXT_texture_compression_s3tc,
> GL_EXT_texture_cube_map, GL_EXT_texture_edge_clamp,
> GL_EXT_texture_env_combine, GL_EXT_texture_env_dot3,
> GL_EXT_texture_filter_anisotropic, GL_EXT_texture_lod,
> GL_EXT_texture_lod_bias, GL_EXT_texture_object, GL_EXT_texture_sRGB,
> GL_EXT_timer_query, GL_EXT_vertex_array, GL_IBM_rasterpos_clip,
> GL_IBM_texture_mirrored_repeat, GL_KTX_buffer_region,
> GL_NV_blend_square,
> GL_NV_copy_depth_to_color, GL_NV_depth_clamp, GL_NV_fence,
> GL_NV_float_buffer, GL_NV_fog_distance, GL_NV_fragment_program,
> GL_NV_fragment_program_option, GL_NV_framebuffer_multisample_coverage,
> GL_NV_half_float, GL_NV_light_max_exponent,
> GL_NV_multisample_filter_hint,
> GL_NV_occlusion_query, GL_NV_packed_depth_stencil,
> GL_NV_pixel_data_range,
> GL_NV_point_sprite, GL_NV_primitive_restart, GL_NV_register_combiners,
> GL_NV_register_combiners2, GL_NV_texgen_reflection,
> GL_NV_texture_compression_vtc, GL_NV_texture_env_combine4,
> GL_NV_texture_expand_normal, GL_NV_texture_rectangle,
> GL_NV_texture_shader, GL_NV_texture_shader2, GL_NV_texture_shader3,
> GL_NV_vertex_array_range, GL_NV_vertex_array_range2,
> GL_NV_vertex_program,
> GL_NV_vertex_program1_1, GL_NV_vertex_program2,
> GL_NV_vertex_program2_option, GL_SGIS_generate_mipmap,
> GL_SGIS_texture_lod, GL_SGIX_depth_texture, GL_SGIX_shadow,
> GL_SUN_slice_accum
>
> visual x bf lv rg d st colorbuffer ax dp st accumbuffer ms cav
> id dep cl sp sz l ci b ro r g b a bf th cl r g b a ns b eat
>
>
> Thank you very much for suggestions,
>
> Roland 

-- 
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