Use glxinfo for Linux | CPN Tools help |
Linux program to check for OpenGL support | How-to |
glxinfo
for Linux
The glxinfo
program can be used to check whether a graphics adaptor provides the OpenGL support that is necessary to run CPN Tools under Linux.
glxinfo
is not distributed with CPN Tools, but it should have been installed when Linux was installed on your computer.
glxinfo
progam
You can run glxinfo
from a shell
$ glxinfo
After glxinfo
has been run, its textual output will be shown.
The third line of the output indicates whether or not there is direct rendering.
CPN Tools will perform best if there is adirect rendering: Yes
Yes
on this line. If there is a No
on this line, then there may be performance problems.
At the bottom of the output there is a large table with 20+ columns of letters and numbers. The last column in this table indicates whether or not your graphics adaptor has hardware support for OpenGL:
None
appears in the last column, then there should be support for OpenGL
Slow
appears in the last column, then there may be performance problems
Ncon
can also appear in the last column, and it stands for non-conformant. It is unclear what effect this will have when running CPN Tools.
If the output from the glxinfo
program reveals that the OpenGL vendor or the OpenGL renderer is Mesa, then
it may be helpful to install a better driver for your graphics adaptor.
Example of an extract from cardinfo output:
OpenGL vendor string: Mesa project: www.mesa3d.org OpenGL renderer string: Mesa GLX Indirect
Note that it may be difficult to find appropriate drivers for graphic adaptors in laptop computers.
Many programs that use OpenGL, such as computer games, frequently reduce the screen resolution when the program is started. CPN Tools does NOT reduce the screen resolution during start up. This may be why you have problems using OpenGL with CPN Tools but not with other programs.
glxinfo
glxinfo
output for a GeForce3 graphics card. This graphics card does support OpenGL hardware acceleration.
glxinfo
output
name of display: :0.0 display: :0 screen: 0 direct rendering: Yes server glx vendor string: NVIDIA Corporation server glx version string: 1.3 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_ARB_multisample client glx vendor string: NVIDIA Corporation client glx version string: 1.3 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_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGI_swap_control, GLX_NV_float_buffer 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_ARB_multisample, GLX_ARB_get_proc_address OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce3/AGP/3DNOW! OpenGL version string: 1.5.1 NVIDIA 61.06 OpenGL extensions: GL_ARB_depth_texture, GL_ARB_imaging, GL_ARB_multisample, GL_ARB_multitexture, GL_ARB_occlusion_query, 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_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_minmax, GL_EXT_blend_subtract, GL_EXT_compiled_vertex_array, GL_EXT_draw_range_elements, GL_EXT_fog_coord, GL_EXT_multi_draw_arrays, 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_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_vertex_array, GL_HP_occlusion_test, 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_fog_distance, 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_register_combiners, GL_NV_register_combiners2, GL_NV_texgen_reflection, GL_NV_texture_compression_vtc, GL_NV_texture_env_combine4, GL_NV_texture_rectangle, GL_NV_texture_shader, GL_NV_texture_shader2, GL_NV_vertex_array_range, GL_NV_vertex_array_range2, GL_NV_vertex_program, GL_NV_vertex_program1_1, GL_SGIS_generate_mipmap, GL_SGIS_multitexture, GL_SGIS_texture_lod, GL_SGIX_depth_texture, GL_SGIX_shadow, GL_SUN_slice_accum glu version: 1.3 glu extensions: GLU_EXT_nurbs_tessellator, GLU_EXT_object_space_tess 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 0 0 24 8 16 16 16 16 0 0 None 0x22 24 dc 0 32 0 r y . 8 8 8 0 0 24 8 16 16 16 16 0 0 None 0x23 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None 0x24 24 tc 0 32 0 r . . 8 8 8 0 0 24 8 16 16 16 16 0 0 None 0x25 24 tc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None 0x26 24 tc 0 32 0 r y . 8 8 8 0 0 16 0 16 16 16 16 0 0 None 0x27 24 tc 0 32 0 r y . 8 8 8 8 0 16 0 16 16 16 16 0 0 None 0x28 24 tc 0 32 0 r . . 8 8 8 0 0 16 0 16 16 16 16 0 0 None 0x29 24 tc 0 32 0 r . . 8 8 8 8 0 16 0 16 16 16 16 0 0 None 0x2a 24 tc 0 32 0 r y . 8 8 8 0 0 0 0 16 16 16 16 0 0 None 0x2b 24 tc 0 32 0 r y . 8 8 8 8 0 0 0 16 16 16 16 0 0 None 0x2c 24 tc 0 32 0 r . . 8 8 8 0 0 0 0 16 16 16 16 0 0 None 0x2d 24 tc 0 32 0 r . . 8 8 8 8 0 0 0 16 16 16 16 0 0 None 0x2e 24 tc 0 32 0 r y . 8 8 8 0 0 24 8 16 16 16 16 2 1 Ncon 0x2f 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 2 1 Ncon 0x30 24 tc 0 32 0 r y . 8 8 8 0 0 24 8 16 16 16 16 4 1 Ncon 0x31 24 tc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 4 1 Ncon 0x32 24 tc 0 32 0 r y . 8 8 8 0 0 16 0 16 16 16 16 2 1 Ncon 0x33 24 tc 0 32 0 r y . 8 8 8 8 0 16 0 16 16 16 16 2 1 Ncon 0x34 24 tc 0 32 0 r y . 8 8 8 0 0 16 0 16 16 16 16 4 1 Ncon 0x35 24 tc 0 32 0 r y . 8 8 8 8 0 16 0 16 16 16 16 4 1 Ncon 0x36 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 0 0 None 0x37 24 dc 0 32 0 r . . 8 8 8 0 0 24 8 16 16 16 16 0 0 None 0x38 24 dc 0 32 0 r . . 8 8 8 8 0 24 8 16 16 16 16 0 0 None 0x39 24 dc 0 32 0 r y . 8 8 8 0 0 16 0 16 16 16 16 0 0 None 0x3a 24 dc 0 32 0 r y . 8 8 8 8 0 16 0 16 16 16 16 0 0 None 0x3b 24 dc 0 32 0 r . . 8 8 8 0 0 16 0 16 16 16 16 0 0 None 0x3c 24 dc 0 32 0 r . . 8 8 8 8 0 16 0 16 16 16 16 0 0 None 0x3d 24 dc 0 32 0 r y . 8 8 8 0 0 0 0 16 16 16 16 0 0 None 0x3e 24 dc 0 32 0 r y . 8 8 8 8 0 0 0 16 16 16 16 0 0 None 0x3f 24 dc 0 32 0 r . . 8 8 8 0 0 0 0 16 16 16 16 0 0 None 0x40 24 dc 0 32 0 r . . 8 8 8 8 0 0 0 16 16 16 16 0 0 None 0x41 24 dc 0 32 0 r y . 8 8 8 0 0 24 8 16 16 16 16 2 1 Ncon 0x42 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 2 1 Ncon 0x43 24 dc 0 32 0 r y . 8 8 8 0 0 24 8 16 16 16 16 4 1 Ncon 0x44 24 dc 0 32 0 r y . 8 8 8 8 0 24 8 16 16 16 16 4 1 Ncon 0x45 24 dc 0 32 0 r y . 8 8 8 0 0 16 0 16 16 16 16 2 1 Ncon 0x46 24 dc 0 32 0 r y . 8 8 8 8 0 16 0 16 16 16 16 2 1 Ncon 0x47 24 dc 0 32 0 r y . 8 8 8 0 0 16 0 16 16 16 16 4 1 Ncon 0x48 24 dc 0 32 0 r y . 8 8 8 8 0 16 0 16 16 16 16 4 1 Ncon