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Thread: Please Help! OpenGL over VNC not working

  1. #1
    Join Date
    Oct 2012
    Beans
    2

    Please Help! OpenGL over VNC not working

    I've been trying to solve this problem for weeks with no luck. I would be eternally grateful if someone could provide any assistance.

    The basic problem is that no OpenGL programs seem to be able to run over VNC. I must have tried 50 proposed solutions with no luck. I’ve tried setting up VirtualGL, doing ssh –X, and regular RealVNC. My understanding is that this is supposed to work without doing anything fancy just over Real VNC, so I must be doing something wrong. However, I CAN run openGL apps on the local machine with a display attached, so I don’t understand why I can’t get it to work remotely.

    If it makes a difference, I don’t care about performance as long as the app runs. Basically I need to run an app “linuxcnc” that requires opengl, but don’t care if I have hardware acceleration as long as it runs (although it would be nice if possible.) BTW this also means upgrading to a different version of Ubuntu is not possible, as linuxcnc wont run in updated kernels.

    I suspect this has something to do with not having drivers installed correctly for my GPU, but don’t understand Linux well enough to know how to verify this. I’ve tried the proprietary drivers with no luck, then uninstalled and went back to open source drivers. My suspicion is based on not having “pbuffer” in any of the GLX visuals from running glx info, which based on forums I have read suggests I have no hardware acceleration (I don’t understand any of this btw).

    Hardware/Software:
    Computer: Dell Dimension 4600
    GPU: Radeon 9200 (RV280)
    OS: Ubuntu 10.04

    If I log into a RealVNC session and try glxgears I get the following error:
    Code:
    Error: couldn't get an RGB, Double-buffered visual

    If I don’t have a physical display attached and I do glxinfo I get something like:
    Code:
    jessie@DUBU:~/Desktop$ glxinfo -display :1
    name of display: :1.0
    Error: couldn't find RGB GLX visual or fbconfig
    Code:
    jessie@DUBU:~/Desktop$ glxinfo -display :2
    name of display: :2.0
    Xlib:  extension "GLX" missing on display ":2.0".
    Xlib:  extension "GLX" missing on display ":2.0".
    Xlib:  extension "GLX" missing on display ":2.0".
    Xlib:  extension "GLX" missing on display ":2.0".
    Xlib:  extension "GLX" missing on display ":2.0".
    Error: couldn't find RGB GLX visual or fbconfig
    
    Xlib:  extension "GLX" missing on display ":2.0".
    Xlib:  extension "GLX" missing on display ":2.0".
    Xlib:  extension "GLX" missing on display ":2.0".
    Xlib:  extension "GLX" missing on display ":2.0".
    Xlib:  extension "GLX" missing on display ":2.0".
    if I plug in a physical display I can get a result like this:

    Code:
    jessie@DUBU:~$ glxinfo -display :0
    name of display: :0.0
    display: :0  screen: 0
    direct rendering: Yes
    server glx vendor string: SGI
    server glx version string: 1.2
    server glx extensions:
        GLX_ARB_multisample, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, 
        GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer, 
        GLX_OML_swap_method, GLX_SGI_make_current_read, GLX_SGI_swap_control, 
        GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
        GLX_SGIX_visual_select_group
    client glx vendor string: Mesa Project and SGI
    client glx version string: 1.4
    client glx extensions:
        GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context, 
        GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_allocate_memory, 
        GLX_MESA_copy_sub_buffer, GLX_MESA_swap_control, 
        GLX_MESA_swap_frame_usage, GLX_OML_swap_method, GLX_OML_sync_control, 
        GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync, 
        GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
        GLX_SGIX_visual_select_group, GLX_EXT_texture_from_pixmap
    GLX version: 1.2
    GLX extensions:
        GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context, 
        GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_allocate_memory, 
        GLX_MESA_copy_sub_buffer, GLX_MESA_swap_frame_usage, GLX_OML_swap_method, 
        GLX_SGI_make_current_read, GLX_SGI_video_sync, GLX_SGIS_multisample, 
        GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, 
        GLX_EXT_texture_from_pixmap
    OpenGL vendor string: Tungsten Graphics, Inc.
    OpenGL renderer string: Mesa DRI R200 (RV280 5961) 20090101 x86/MMX/SSE2 TCL DRI2
    OpenGL version string: 1.3 Mesa 7.7.1
    OpenGL extensions:
        GL_EXT_compiled_vertex_array, GL_EXT_texture_env_add, GL_ARB_draw_buffers, 
        GL_ARB_imaging, GL_ARB_multisample, GL_ARB_multitexture, 
        GL_ARB_occlusion_query, GL_ARB_point_parameters, GL_ARB_point_sprite, 
        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_crossbar, 
        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_window_pos, 
        GL_EXT_abgr, GL_EXT_bgra, GL_EXT_blend_color, 
        GL_EXT_blend_equation_separate, GL_EXT_blend_func_separate, 
        GL_EXT_blend_logic_op, GL_EXT_blend_minmax, GL_EXT_blend_subtract, 
        GL_EXT_convolution, GL_EXT_copy_texture, GL_EXT_draw_range_elements, 
        GL_EXT_framebuffer_object, GL_EXT_fog_coord, GL_EXT_histogram, 
        GL_EXT_multi_draw_arrays, GL_EXT_packed_depth_stencil, 
        GL_EXT_packed_pixels, GL_EXT_point_parameters, GL_EXT_polygon_offset, 
        GL_EXT_rescale_normal, GL_EXT_secondary_color, 
        GL_EXT_separate_specular_color, GL_EXT_stencil_wrap, GL_EXT_subtexture, 
        GL_EXT_texture, GL_EXT_texture3D, 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_bias, GL_EXT_texture_mirror_clamp, 
        GL_EXT_texture_object, GL_EXT_texture_rectangle, GL_EXT_vertex_array, 
        GL_APPLE_packed_pixels, GL_ATI_blend_equation_separate, 
        GL_ATI_texture_env_combine3, GL_ATI_texture_mirror_once, 
        GL_ATI_fragment_shader, GL_IBM_multimode_draw_arrays, 
        GL_IBM_rasterpos_clip, GL_IBM_texture_mirrored_repeat, 
        GL_INGR_blend_func_separate, GL_MESA_pack_invert, GL_MESA_ycbcr_texture, 
        GL_MESA_window_pos, GL_NV_blend_square, GL_NV_light_max_exponent, 
        GL_NV_packed_depth_stencil, GL_NV_texture_rectangle, 
        GL_NV_texgen_reflection, GL_OES_read_format, GL_SGI_color_matrix, 
        GL_SGI_color_table, GL_SGIS_generate_mipmap, GL_SGIS_texture_border_clamp, 
        GL_SGIS_texture_edge_clamp, GL_SGIS_texture_lod, GL_SUN_multi_draw_arrays
    
    64 GLX Visuals
       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
    ----------------------------------------------------------------------
    0x21 24 tc  0 32  0 r  y  .  8  8  8  8  0 24  8  0  0  0  0  0 0 None
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    0xcf 24 tc  0 24  0 r  .  .  8  8  8  0  0  0  0 16 16 16  0  0 0 Slow
    0xd0 24 tc  0 24  0 r  y  .  8  8  8  0  0  0  0  0  0  0  0  0 0 None
    0xd1 24 tc  0 24  0 r  y  .  8  8  8  0  0  0  0 16 16 16  0  0 0 Slow
    0xd2 24 tc  0 24  0 r  .  .  8  8  8  0  0 16  0  0  0  0  0  0 0 None
    0xd3 24 tc  0 24  0 r  .  .  8  8  8  0  0 16  0 16 16 16  0  0 0 Slow
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    0xd5 24 tc  0 24  0 r  y  .  8  8  8  0  0 16  0 16 16 16  0  0 0 Slow
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    0xd7 24 tc  0 24  0 r  .  .  8  8  8  0  0 24  0 16 16 16  0  0 0 Slow
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    0xd9 24 tc  0 24  0 r  y  .  8  8  8  0  0 24  0 16 16 16  0  0 0 Slow
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    0xe0 24 tc  0 32  0 r  y  .  8  8  8  8  0  0  0  0  0  0  0  0 0 None
    0xe1 24 tc  0 32  0 r  y  .  8  8  8  8  0  0  0 16 16 16 16  0 0 Slow
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    0xe3 24 tc  0 32  0 r  .  .  8  8  8  8  0 16  0 16 16 16 16  0 0 Slow
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    0x10a 24 dc  0 32  0 r  y  .  8  8  8  8  0 24  8 16 16 16 16  0 0 Slow
    0x6d 32 tc  0 32  0 r  y  .  8  8  8  8  0 16  0  0  0  0  0  0 0 None
    
    96 GLXFBConfigs:
       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
    ----------------------------------------------------------------------
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    0x6f  0 tc  0 16  0 r  .  .  5  6  5  0  0  0  0 16 16 16  0  0 0 Slow
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    0xad  0 dc  0 16  0 r  y  .  5  6  5  0  0 24  8 16 16 16  0  0 0 Slow
    0xae  0 dc  0 24  0 r  .  .  8  8  8  0  0  0  0  0  0  0  0  0 0 None
    0xaf  0 dc  0 24  0 r  .  .  8  8  8  0  0  0  0 16 16 16  0  0 0 Slow
    0xb0  0 dc  0 24  0 r  y  .  8  8  8  0  0  0  0  0  0  0  0  0 0 None
    0xb1  0 dc  0 24  0 r  y  .  8  8  8  0  0  0  0 16 16 16  0  0 0 Slow
    0xb2  0 dc  0 24  0 r  .  .  8  8  8  0  0 16  0  0  0  0  0  0 0 None
    0xb3  0 dc  0 24  0 r  .  .  8  8  8  0  0 16  0 16 16 16  0  0 0 Slow
    0xb4  0 dc  0 24  0 r  y  .  8  8  8  0  0 16  0  0  0  0  0  0 0 None
    0xb5  0 dc  0 24  0 r  y  .  8  8  8  0  0 16  0 16 16 16  0  0 0 Slow
    0xb6  0 dc  0 24  0 r  .  .  8  8  8  0  0 24  0  0  0  0  0  0 0 None
    0xb7  0 dc  0 24  0 r  .  .  8  8  8  0  0 24  0 16 16 16  0  0 0 Slow
    0xb8  0 dc  0 24  0 r  y  .  8  8  8  0  0 24  0  0  0  0  0  0 0 None
    0xb9  0 dc  0 24  0 r  y  .  8  8  8  0  0 24  0 16 16 16  0  0 0 Slow
    0xba  0 dc  0 24  0 r  .  .  8  8  8  0  0 24  8  0  0  0  0  0 0 None
    0xbb  0 dc  0 24  0 r  .  .  8  8  8  0  0 24  8 16 16 16  0  0 0 Slow
    0xbc  0 dc  0 24  0 r  y  .  8  8  8  0  0 24  8  0  0  0  0  0 0 None
    0xbd  0 dc  0 24  0 r  y  .  8  8  8  0  0 24  8 16 16 16  0  0 0 Slow
    0xbe  0 dc  0 32  0 r  .  .  8  8  8  8  0  0  0  0  0  0  0  0 0 None
    0xbf  0 dc  0 32  0 r  .  .  8  8  8  8  0  0  0 16 16 16 16  0 0 Slow
    0xc0  0 dc  0 32  0 r  y  .  8  8  8  8  0  0  0  0  0  0  0  0 0 None
    0xc1  0 dc  0 32  0 r  y  .  8  8  8  8  0  0  0 16 16 16 16  0 0 Slow
    0xc2  0 dc  0 32  0 r  .  .  8  8  8  8  0 16  0  0  0  0  0  0 0 None
    0xc3  0 dc  0 32  0 r  .  .  8  8  8  8  0 16  0 16 16 16 16  0 0 Slow
    0xc4  0 dc  0 32  0 r  y  .  8  8  8  8  0 16  0  0  0  0  0  0 0 None
    0xc5  0 dc  0 32  0 r  y  .  8  8  8  8  0 16  0 16 16 16 16  0 0 Slow
    0xc6  0 dc  0 32  0 r  .  .  8  8  8  8  0 24  0  0  0  0  0  0 0 None
    0xc7  0 dc  0 32  0 r  .  .  8  8  8  8  0 24  0 16 16 16 16  0 0 Slow
    0xc8  0 dc  0 32  0 r  y  .  8  8  8  8  0 24  0  0  0  0  0  0 0 None
    0xc9  0 dc  0 32  0 r  y  .  8  8  8  8  0 24  0 16 16 16 16  0 0 Slow
    0xca  0 dc  0 32  0 r  .  .  8  8  8  8  0 24  8  0  0  0  0  0 0 None
    0xcb  0 dc  0 32  0 r  .  .  8  8  8  8  0 24  8 16 16 16 16  0 0 Slow
    0xcc  0 dc  0 32  0 r  y  .  8  8  8  8  0 24  8  0  0  0  0  0 0 None
    0xcd  0 dc  0 32  0 r  y  .  8  8  8  8  0 24  8 16 16 16 16  0 0 Slow

  2. #2
    Join Date
    Oct 2012
    Beans
    2

    Re: Please Help! OpenGL over VNC not working

    I was able to get the software to run with poor/mediocre performance by removing glx drivers and replacing with software drivers only by running:
    Code:
    sudo apt-get install libgl1-mesa-swx11
    I can now run opengl apps using X11 forwarding as well as in RealVNC.

    This should be good enough for the moment, but I would still love a solution that allows me to use hardware 3d acceleration.

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