FSLeyes terminates on startup

[samfux84]

Hi,

I have installed FSL 6.0.5 on our university HPC cluster (Ubuntu 22.04 LTS) and when starting FSLeyes through X11, then it crashes with an error:

[sfux@eu-login-25 ~]$ fsleyes
   ERROR              main.py  582: initialise      - Unable to initialise OpenGL!
wx._core.wxAssertionError: C++ assertion "ok" failed at /home/conda/feedstock_root/build_artifacts/wxpython_1585592665613/work/ext/wxWidgets/src/unix/glx11.cpp(589) in GetGLXVersion(): GLX version not found

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/cluster/software/manual/fsl/6.0.5/x86_64/fslpython/envs/fslpython/lib/python3.8/site-packages/fsleyes/gl/__init__.py", line 823, in __createWXGLCanvas
    self.__canvas = wxgl.GLCanvas(self.__parent, **attrs)
SystemError: <class 'wx._glcanvas.GLCanvas'> returned a result with an error set

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/cluster/software/manual/fsl/6.0.5/x86_64/fslpython/envs/fslpython/lib/python3.8/site-packages/fsleyes/main.py", line 579, in initialise
    fslgl.getGLContext(ready=realCallback)
  File "/cluster/software/manual/fsl/6.0.5/x86_64/fslpython/envs/fslpython/lib/python3.8/site-packages/fsleyes/gl/__init__.py", line 503, in getGLContext
    thismod._glContext = GLContext(**kwargs)
  File "/cluster/software/manual/fsl/6.0.5/x86_64/fslpython/envs/fslpython/lib/python3.8/site-packages/fsleyes/gl/__init__.py", line 671, in __init__
    self.__createWXGLCanvas()
  File "/cluster/software/manual/fsl/6.0.5/x86_64/fslpython/envs/fslpython/lib/python3.8/site-packages/fsleyes/gl/__init__.py", line 833, in __createWXGLCanvas
    self.__canvas.SetSize((0, 0))
wx._core.wxAssertionError: C++ assertion "m_widget" failed at /home/conda/feedstock_root/build_artifacts/wxpython_1585592665613/work/ext/wxWidgets/src/gtk/window.cpp(2888) in DoSetSize(): invalid window

I already tried the following things, based on other issues reported in this repo:

• turning off hardware and software acceleration in my X11 server (MobaXterm)
• starting the software with: fsleyes -gl 1 4
• starting the software with: fsleyes -gl 2 1
• starting the software with: GDK_BACKEND=x11 fsleyes
• starting the software with: GDK_BACKEND=x11 fsleyes -gl 1 4
• starting the software with: GDK_BACKEND=x11 fsleyes -gl 2 1

But in all cases I get the same error. Is this a known problem and if yes, is there any workaround known to fix this?

Any help is appreciated.

Best regards

Sam

[pauldmccarthy]

Hi @samfux84, the GLX version not found message implies that GLX is not installed on your server. Can you install the mesa-utils package, and try running glxgears and glxinfo? If those commands don't work, then FSLeyes is not going to work.

You can find some more pointers, and links to additional resources, here: https://open.win.ox.ac.uk/pages/fsl/fsleyes/fsleyes/userdoc/troubleshooting.html#ssh-x11-vnc-nomachine-etc-fsleyes-won-t-start

[samfux84]

Hi @pauldmccarthy,

Thank you for your reply.

[sfux@eu-login-50 ~]$ module load stack/2024-06 fsl/6.0.5 mesa
Many modules are hidden in this stack. Use "module --show_hidden spider SOFTWARE" if you are not able to find the required software
[sfux@eu-login-50 ~]$ module list

Currently Loaded Modules:
  1) gcc/12.2.0   2) stack/2024-06   3) fsl/6.0.5   4) mesa/23.0.3-27oz7sb



[sfux@eu-login-50 ~]$ fsleyes
   ERROR              main.py  582: initialise      - Unable to initialise OpenGL!
wx._core.wxAssertionError: C++ assertion "ok" failed at /home/conda/feedstock_root/build_artifacts/wxpython_1585592665613/work/ext/wxWidgets/src/unix/glx11.cpp(589) in GetGLXVersion(): GLX version not found

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/cluster/software/manual/fsl/6.0.5/x86_64/fslpython/envs/fslpython/lib/python3.8/site-packages/fsleyes/gl/__init__.py", line 823, in __createWXGLCanvas
    self.__canvas = wxgl.GLCanvas(self.__parent, **attrs)
SystemError: <class 'wx._glcanvas.GLCanvas'> returned a result with an error set

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/cluster/software/manual/fsl/6.0.5/x86_64/fslpython/envs/fslpython/lib/python3.8/site-packages/fsleyes/main.py", line 579, in initialise
    fslgl.getGLContext(ready=realCallback)
  File "/cluster/software/manual/fsl/6.0.5/x86_64/fslpython/envs/fslpython/lib/python3.8/site-packages/fsleyes/gl/__init__.py", line 503, in getGLContext
    thismod._glContext = GLContext(**kwargs)
  File "/cluster/software/manual/fsl/6.0.5/x86_64/fslpython/envs/fslpython/lib/python3.8/site-packages/fsleyes/gl/__init__.py", line 671, in __init__
    self.__createWXGLCanvas()
  File "/cluster/software/manual/fsl/6.0.5/x86_64/fslpython/envs/fslpython/lib/python3.8/site-packages/fsleyes/gl/__init__.py", line 833, in __createWXGLCanvas
    self.__canvas.SetSize((0, 0))
wx._core.wxAssertionError: C++ assertion "m_widget" failed at /home/conda/feedstock_root/build_artifacts/wxpython_1585592665613/work/ext/wxWidgets/src/gtk/window.cpp(2888) in DoSetSize(): invalid window
[sfux@eu-login-50 ~]$ which glxinfo
/usr/bin/glxinfo
[sfux@eu-login-50 ~]$ glxinfo
name of display: localhost:21.0
display: localhost:21  screen: 0
direct rendering: Yes
server glx vendor string: Brian Paul
server glx version string: 1.4 Mesa 23.0.3
server glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile,
    GLX_ARB_get_proc_address, GLX_EXT_create_context_es2_profile,
    GLX_EXT_create_context_es_profile, GLX_EXT_texture_from_pixmap,
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
    GLX_MESA_pixmap_colormap, GLX_MESA_release_buffers, GLX_SGIX_fbconfig,
    GLX_SGIX_pbuffer
client glx vendor string: Brian Paul
client glx version string: 1.4 Mesa 23.0.3
client glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile,
    GLX_ARB_get_proc_address, GLX_EXT_create_context_es2_profile,
    GLX_EXT_create_context_es_profile, GLX_EXT_texture_from_pixmap,
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
    GLX_MESA_pixmap_colormap, GLX_MESA_release_buffers, GLX_SGIX_fbconfig,
    GLX_SGIX_pbuffer
GLX version: 1.4
GLX extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile,
    GLX_ARB_get_proc_address, GLX_EXT_create_context_es2_profile,
    GLX_EXT_create_context_es_profile, GLX_EXT_texture_from_pixmap,
    GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
    GLX_MESA_pixmap_colormap, GLX_MESA_release_buffers, GLX_SGIX_fbconfig,
    GLX_SGIX_pbuffer
OpenGL vendor string: Mesa
OpenGL renderer string: softpipe
OpenGL core profile version string: 3.3 (Core Profile) Mesa 23.0.3
OpenGL core profile shading language version string: 3.30
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
    GL_3DFX_texture_compression_FXT1, GL_AMD_conservative_depth,
    GL_AMD_draw_buffers_blend, GL_AMD_gpu_shader_int64,
    GL_AMD_multi_draw_indirect, GL_AMD_seamless_cubemap_per_texture,
    GL_AMD_shader_stencil_export, GL_AMD_shader_trinary_minmax,
    GL_AMD_texture_texture4, GL_AMD_vertex_shader_layer,
    GL_AMD_vertex_shader_viewport_index, GL_ANGLE_texture_compression_dxt3,
    GL_ANGLE_texture_compression_dxt5, GL_ARB_ES2_compatibility,
    GL_ARB_ES3_1_compatibility, GL_ARB_ES3_compatibility,
    GL_ARB_arrays_of_arrays, GL_ARB_base_instance, GL_ARB_blend_func_extended,
    GL_ARB_buffer_storage, GL_ARB_clear_buffer_object, GL_ARB_clear_texture,
    GL_ARB_clip_control, GL_ARB_color_buffer_float,
    GL_ARB_compressed_texture_pixel_storage, GL_ARB_compute_shader,
    GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth,
    GL_ARB_copy_buffer, GL_ARB_copy_image, GL_ARB_cull_distance,
    GL_ARB_debug_output, GL_ARB_depth_buffer_float, GL_ARB_depth_clamp,
    GL_ARB_derivative_control, GL_ARB_direct_state_access,
    GL_ARB_draw_buffers, GL_ARB_draw_buffers_blend,
    GL_ARB_draw_elements_base_vertex, GL_ARB_draw_indirect,
    GL_ARB_draw_instanced, GL_ARB_enhanced_layouts,
    GL_ARB_explicit_attrib_location, GL_ARB_explicit_uniform_location,
    GL_ARB_fragment_coord_conventions, GL_ARB_fragment_layer_viewport,
    GL_ARB_fragment_shader, GL_ARB_framebuffer_no_attachments,
    GL_ARB_framebuffer_object, GL_ARB_framebuffer_sRGB,
    GL_ARB_get_program_binary, GL_ARB_get_texture_sub_image,
    GL_ARB_gpu_shader5, GL_ARB_gpu_shader_fp64, GL_ARB_gpu_shader_int64,
    GL_ARB_half_float_pixel, GL_ARB_half_float_vertex,
    GL_ARB_instanced_arrays, GL_ARB_internalformat_query,
    GL_ARB_internalformat_query2, GL_ARB_invalidate_subdata,
    GL_ARB_map_buffer_alignment, GL_ARB_map_buffer_range, GL_ARB_multi_bind,
    GL_ARB_multi_draw_indirect, GL_ARB_occlusion_query2,
    GL_ARB_parallel_shader_compile, GL_ARB_pipeline_statistics_query,
    GL_ARB_pixel_buffer_object, GL_ARB_point_sprite,
    GL_ARB_program_interface_query, GL_ARB_provoking_vertex,
    GL_ARB_robustness, GL_ARB_sampler_objects, GL_ARB_seamless_cube_map,
    GL_ARB_seamless_cubemap_per_texture, GL_ARB_separate_shader_objects,
    GL_ARB_shader_atomic_counter_ops, GL_ARB_shader_atomic_counters,
    GL_ARB_shader_bit_encoding, GL_ARB_shader_image_load_store,
    GL_ARB_shader_image_size, GL_ARB_shader_objects,
    GL_ARB_shader_stencil_export, GL_ARB_shader_storage_buffer_object,
    GL_ARB_shader_subroutine, GL_ARB_shader_texture_lod,
    GL_ARB_shading_language_420pack, GL_ARB_shading_language_include,
    GL_ARB_shading_language_packing, GL_ARB_stencil_texturing, GL_ARB_sync,
    GL_ARB_texture_buffer_object, GL_ARB_texture_buffer_object_rgb32,
    GL_ARB_texture_buffer_range, GL_ARB_texture_compression_bptc,
    GL_ARB_texture_compression_rgtc, GL_ARB_texture_cube_map_array,
    GL_ARB_texture_filter_anisotropic, GL_ARB_texture_float,
    GL_ARB_texture_gather, GL_ARB_texture_mirror_clamp_to_edge,
    GL_ARB_texture_multisample, GL_ARB_texture_non_power_of_two,
    GL_ARB_texture_query_levels, GL_ARB_texture_query_lod,
    GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui,
    GL_ARB_texture_stencil8, GL_ARB_texture_storage,
    GL_ARB_texture_storage_multisample, GL_ARB_texture_swizzle,
    GL_ARB_texture_view, GL_ARB_timer_query, GL_ARB_transform_feedback2,
    GL_ARB_transform_feedback3, GL_ARB_transform_feedback_instanced,
    GL_ARB_transform_feedback_overflow_query, GL_ARB_uniform_buffer_object,
    GL_ARB_vertex_array_bgra, GL_ARB_vertex_array_object,
    GL_ARB_vertex_attrib_64bit, GL_ARB_vertex_attrib_binding,
    GL_ARB_vertex_buffer_object, GL_ARB_vertex_shader,
    GL_ARB_vertex_type_10f_11f_11f_rev, GL_ARB_vertex_type_2_10_10_10_rev,
    GL_ARB_viewport_array, GL_ATI_blend_equation_separate,
    GL_ATI_texture_float, GL_ATI_texture_mirror_once,
    GL_EXT_EGL_image_storage, GL_EXT_EGL_sync, GL_EXT_abgr,
    GL_EXT_blend_equation_separate, GL_EXT_debug_label,
    GL_EXT_depth_bounds_test, GL_EXT_draw_buffers2, GL_EXT_draw_instanced,
    GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample,
    GL_EXT_framebuffer_multisample_blit_scaled, GL_EXT_framebuffer_object,
    GL_EXT_framebuffer_sRGB, GL_EXT_packed_depth_stencil, GL_EXT_packed_float,
    GL_EXT_pixel_buffer_object, GL_EXT_provoking_vertex,
    GL_EXT_shader_integer_mix, GL_EXT_texture_array,
    GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_rgtc,
    GL_EXT_texture_compression_s3tc, GL_EXT_texture_filter_anisotropic,
    GL_EXT_texture_integer, GL_EXT_texture_mirror_clamp, GL_EXT_texture_sRGB,
    GL_EXT_texture_sRGB_R8, GL_EXT_texture_sRGB_RG8,
    GL_EXT_texture_sRGB_decode, GL_EXT_texture_shared_exponent,
    GL_EXT_texture_snorm, GL_EXT_texture_swizzle, GL_EXT_timer_query,
    GL_EXT_transform_feedback, GL_EXT_vertex_array_bgra,
    GL_EXT_vertex_attrib_64bit, GL_IBM_multimode_draw_arrays,
    GL_KHR_context_flush_control, GL_KHR_debug, GL_KHR_no_error,
    GL_KHR_parallel_shader_compile, GL_KHR_texture_compression_astc_ldr,
    GL_KHR_texture_compression_astc_sliced_3d, GL_MESA_pack_invert,
    GL_MESA_shader_integer_functions, GL_MESA_texture_signed_rgba,
    GL_MESA_ycbcr_texture, GL_NV_conditional_render, GL_NV_copy_image,
    GL_NV_depth_clamp, GL_NV_packed_depth_stencil, GL_NV_shader_atomic_float,
    GL_OES_EGL_image, GL_S3_s3tc

OpenGL version string: 3.3 (Compatibility Profile) Mesa 23.0.3
OpenGL shading language version string: 3.30
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile
OpenGL extensions:
    GL_3DFX_texture_compression_FXT1, GL_AMD_conservative_depth,
    GL_AMD_draw_buffers_blend, GL_AMD_multi_draw_indirect,
    GL_AMD_seamless_cubemap_per_texture, GL_AMD_shader_stencil_export,
    GL_AMD_shader_trinary_minmax, GL_AMD_texture_texture4,
    GL_AMD_vertex_shader_layer, GL_AMD_vertex_shader_viewport_index,
    GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5,
    GL_APPLE_packed_pixels, GL_ARB_ES2_compatibility,
    GL_ARB_ES3_1_compatibility, GL_ARB_ES3_compatibility,
    GL_ARB_arrays_of_arrays, GL_ARB_base_instance, GL_ARB_blend_func_extended,
    GL_ARB_buffer_storage, GL_ARB_clear_buffer_object, GL_ARB_clear_texture,
    GL_ARB_clip_control, GL_ARB_color_buffer_float, GL_ARB_compatibility,
    GL_ARB_compressed_texture_pixel_storage, GL_ARB_compute_shader,
    GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth,
    GL_ARB_copy_buffer, GL_ARB_copy_image, GL_ARB_cull_distance,
    GL_ARB_debug_output, GL_ARB_depth_buffer_float, GL_ARB_depth_clamp,
    GL_ARB_depth_texture, GL_ARB_derivative_control,
    GL_ARB_direct_state_access, GL_ARB_draw_buffers,
    GL_ARB_draw_buffers_blend, GL_ARB_draw_elements_base_vertex,
    GL_ARB_draw_indirect, GL_ARB_draw_instanced, GL_ARB_enhanced_layouts,
    GL_ARB_explicit_attrib_location, GL_ARB_explicit_uniform_location,
    GL_ARB_fragment_coord_conventions, GL_ARB_fragment_layer_viewport,
    GL_ARB_fragment_program, GL_ARB_fragment_program_shadow,
    GL_ARB_fragment_shader, GL_ARB_framebuffer_no_attachments,
    GL_ARB_framebuffer_object, GL_ARB_framebuffer_sRGB,
    GL_ARB_get_program_binary, GL_ARB_get_texture_sub_image,
    GL_ARB_gpu_shader5, GL_ARB_gpu_shader_fp64, GL_ARB_half_float_pixel,
    GL_ARB_half_float_vertex, GL_ARB_instanced_arrays,
    GL_ARB_internalformat_query, GL_ARB_internalformat_query2,
    GL_ARB_invalidate_subdata, GL_ARB_map_buffer_alignment,
    GL_ARB_map_buffer_range, GL_ARB_multi_bind, GL_ARB_multi_draw_indirect,
    GL_ARB_multisample, GL_ARB_multitexture, GL_ARB_occlusion_query,
    GL_ARB_occlusion_query2, GL_ARB_parallel_shader_compile,
    GL_ARB_pipeline_statistics_query, GL_ARB_pixel_buffer_object,
    GL_ARB_point_parameters, GL_ARB_point_sprite,
    GL_ARB_program_interface_query, GL_ARB_provoking_vertex,
    GL_ARB_robustness, GL_ARB_sampler_objects, GL_ARB_seamless_cube_map,
    GL_ARB_seamless_cubemap_per_texture, GL_ARB_separate_shader_objects,
    GL_ARB_shader_atomic_counter_ops, GL_ARB_shader_atomic_counters,
    GL_ARB_shader_bit_encoding, GL_ARB_shader_image_load_store,
    GL_ARB_shader_image_size, GL_ARB_shader_objects,
    GL_ARB_shader_stencil_export, GL_ARB_shader_storage_buffer_object,
    GL_ARB_shader_subroutine, GL_ARB_shader_texture_lod,
    GL_ARB_shading_language_100, GL_ARB_shading_language_420pack,
    GL_ARB_shading_language_include, GL_ARB_shading_language_packing,
    GL_ARB_shadow, GL_ARB_stencil_texturing, GL_ARB_sync,
    GL_ARB_texture_border_clamp, GL_ARB_texture_buffer_object,
    GL_ARB_texture_buffer_object_rgb32, GL_ARB_texture_buffer_range,
    GL_ARB_texture_compression, GL_ARB_texture_compression_bptc,
    GL_ARB_texture_compression_rgtc, GL_ARB_texture_cube_map,
    GL_ARB_texture_cube_map_array, GL_ARB_texture_env_add,
    GL_ARB_texture_env_combine, GL_ARB_texture_env_crossbar,
    GL_ARB_texture_env_dot3, GL_ARB_texture_filter_anisotropic,
    GL_ARB_texture_float, GL_ARB_texture_gather,
    GL_ARB_texture_mirror_clamp_to_edge, GL_ARB_texture_mirrored_repeat,
    GL_ARB_texture_multisample, GL_ARB_texture_non_power_of_two,
    GL_ARB_texture_query_levels, GL_ARB_texture_query_lod,
    GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui,
    GL_ARB_texture_stencil8, GL_ARB_texture_storage,
    GL_ARB_texture_storage_multisample, GL_ARB_texture_swizzle,
    GL_ARB_texture_view, GL_ARB_timer_query, GL_ARB_transform_feedback2,
    GL_ARB_transform_feedback3, GL_ARB_transform_feedback_instanced,
    GL_ARB_transform_feedback_overflow_query, GL_ARB_transpose_matrix,
    GL_ARB_uniform_buffer_object, GL_ARB_vertex_array_bgra,
    GL_ARB_vertex_array_object, GL_ARB_vertex_attrib_64bit,
    GL_ARB_vertex_attrib_binding, GL_ARB_vertex_buffer_object,
    GL_ARB_vertex_program, GL_ARB_vertex_shader,
    GL_ARB_vertex_type_10f_11f_11f_rev, GL_ARB_vertex_type_2_10_10_10_rev,
    GL_ARB_viewport_array, GL_ARB_window_pos, GL_ATI_blend_equation_separate,
    GL_ATI_draw_buffers, GL_ATI_fragment_shader, GL_ATI_separate_stencil,
    GL_ATI_texture_compression_3dc, GL_ATI_texture_env_combine3,
    GL_ATI_texture_float, GL_ATI_texture_mirror_once,
    GL_EXT_EGL_image_storage, GL_EXT_EGL_sync, GL_EXT_abgr, GL_EXT_bgra,
    GL_EXT_blend_color, GL_EXT_blend_equation_separate,
    GL_EXT_blend_func_separate, GL_EXT_blend_minmax, GL_EXT_blend_subtract,
    GL_EXT_compiled_vertex_array, GL_EXT_copy_texture, GL_EXT_debug_label,
    GL_EXT_depth_bounds_test, GL_EXT_direct_state_access,
    GL_EXT_draw_buffers2, GL_EXT_draw_instanced, GL_EXT_draw_range_elements,
    GL_EXT_fog_coord, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_multisample,
    GL_EXT_framebuffer_multisample_blit_scaled, GL_EXT_framebuffer_object,
    GL_EXT_framebuffer_sRGB, GL_EXT_gpu_program_parameters,
    GL_EXT_gpu_shader4, GL_EXT_multi_draw_arrays, GL_EXT_packed_depth_stencil,
    GL_EXT_packed_float, GL_EXT_packed_pixels, GL_EXT_pixel_buffer_object,
    GL_EXT_point_parameters, GL_EXT_provoking_vertex, GL_EXT_rescale_normal,
    GL_EXT_secondary_color, GL_EXT_separate_specular_color,
    GL_EXT_shader_integer_mix, GL_EXT_shadow_funcs, GL_EXT_stencil_two_side,
    GL_EXT_stencil_wrap, GL_EXT_subtexture, GL_EXT_texture, GL_EXT_texture3D,
    GL_EXT_texture_array, GL_EXT_texture_buffer_object,
    GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_latc,
    GL_EXT_texture_compression_rgtc, GL_EXT_texture_compression_s3tc,
    GL_EXT_texture_cube_map, GL_EXT_texture_edge_clamp,
    GL_EXT_texture_env_add, GL_EXT_texture_env_combine,
    GL_EXT_texture_env_dot3, GL_EXT_texture_filter_anisotropic,
    GL_EXT_texture_integer, GL_EXT_texture_lod_bias,
    GL_EXT_texture_mirror_clamp, GL_EXT_texture_object,
    GL_EXT_texture_rectangle, GL_EXT_texture_sRGB, GL_EXT_texture_sRGB_R8,
    GL_EXT_texture_sRGB_RG8, GL_EXT_texture_sRGB_decode,
    GL_EXT_texture_shared_exponent, GL_EXT_texture_snorm,
    GL_EXT_texture_swizzle, GL_EXT_timer_query, GL_EXT_transform_feedback,
    GL_EXT_vertex_array, GL_EXT_vertex_array_bgra, GL_EXT_vertex_attrib_64bit,
    GL_IBM_multimode_draw_arrays, GL_IBM_rasterpos_clip,
    GL_IBM_texture_mirrored_repeat, GL_INGR_blend_func_separate,
    GL_KHR_context_flush_control, GL_KHR_debug, GL_KHR_no_error,
    GL_KHR_parallel_shader_compile, GL_KHR_texture_compression_astc_ldr,
    GL_KHR_texture_compression_astc_sliced_3d, GL_MESA_pack_invert,
    GL_MESA_shader_integer_functions, GL_MESA_texture_signed_rgba,
    GL_MESA_window_pos, GL_MESA_ycbcr_texture, GL_NV_ES1_1_compatibility,
    GL_NV_blend_square, GL_NV_conditional_render, GL_NV_copy_depth_to_color,
    GL_NV_copy_image, GL_NV_depth_clamp, GL_NV_fog_distance,
    GL_NV_half_float, GL_NV_light_max_exponent, GL_NV_packed_depth_stencil,
    GL_NV_primitive_restart, GL_NV_shader_atomic_float,
    GL_NV_texgen_reflection, GL_NV_texture_env_combine4,
    GL_NV_texture_rectangle, GL_OES_EGL_image, GL_OES_read_format,
    GL_S3_s3tc, GL_SGIS_generate_mipmap, GL_SGIS_texture_border_clamp,
    GL_SGIS_texture_edge_clamp, GL_SGIS_texture_lod, GL_SUN_multi_draw_arrays

OpenGL ES profile version string: OpenGL ES 3.1 Mesa 23.0.3
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.10
OpenGL ES profile extensions:
    GL_ANGLE_pack_reverse_row_order, GL_ANGLE_texture_compression_dxt3,
    GL_ANGLE_texture_compression_dxt5, GL_APPLE_texture_max_level,
    GL_EXT_EGL_image_storage, GL_EXT_base_instance,
    GL_EXT_blend_func_extended, GL_EXT_blend_minmax, GL_EXT_buffer_storage,
    GL_EXT_clear_texture, GL_EXT_clip_control, GL_EXT_clip_cull_distance,
    GL_EXT_color_buffer_float, GL_EXT_color_buffer_half_float,
    GL_EXT_compressed_ETC1_RGB8_sub_texture, GL_EXT_copy_image,
    GL_EXT_debug_label, GL_EXT_depth_clamp, GL_EXT_discard_framebuffer,
    GL_EXT_disjoint_timer_query, GL_EXT_draw_buffers,
    GL_EXT_draw_buffers_indexed, GL_EXT_draw_elements_base_vertex,
    GL_EXT_draw_instanced, GL_EXT_float_blend, GL_EXT_frag_depth,
    GL_EXT_geometry_point_size, GL_EXT_geometry_shader, GL_EXT_gpu_shader5,
    GL_EXT_map_buffer_range, GL_EXT_multi_draw_arrays,
    GL_EXT_occlusion_query_boolean, GL_EXT_primitive_bounding_box,
    GL_EXT_read_format_bgra, GL_EXT_render_snorm, GL_EXT_sRGB_write_control,
    GL_EXT_separate_shader_objects, GL_EXT_shader_implicit_conversions,
    GL_EXT_shader_integer_mix, GL_EXT_shader_io_blocks,
    GL_EXT_texture_border_clamp, GL_EXT_texture_buffer,
    GL_EXT_texture_compression_bptc, GL_EXT_texture_compression_dxt1,
    GL_EXT_texture_compression_rgtc, GL_EXT_texture_compression_s3tc,
    GL_EXT_texture_compression_s3tc_srgb, GL_EXT_texture_cube_map_array,
    GL_EXT_texture_filter_anisotropic, GL_EXT_texture_format_BGRA8888,
    GL_EXT_texture_mirror_clamp_to_edge, GL_EXT_texture_norm16,
    GL_EXT_texture_query_lod, GL_EXT_texture_rg, GL_EXT_texture_sRGB_R8,
    GL_EXT_texture_sRGB_RG8, GL_EXT_texture_sRGB_decode,
    GL_EXT_texture_type_2_10_10_10_REV, GL_EXT_texture_view,
    GL_EXT_unpack_subimage, GL_KHR_context_flush_control, GL_KHR_debug,
    GL_KHR_no_error, GL_KHR_parallel_shader_compile,
    GL_KHR_texture_compression_astc_ldr,
    GL_KHR_texture_compression_astc_sliced_3d, GL_MESA_bgra,
    GL_MESA_framebuffer_flip_y, GL_MESA_shader_integer_functions,
    GL_NV_conditional_render, GL_NV_draw_buffers, GL_NV_fbo_color_attachments,
    GL_NV_image_formats, GL_NV_pack_subimage, GL_NV_pixel_buffer_object,
    GL_NV_read_buffer, GL_NV_read_depth, GL_NV_read_depth_stencil,
    GL_NV_read_stencil, GL_NV_shader_noperspective_interpolation,
    GL_OES_EGL_image, GL_OES_EGL_image_external,
    GL_OES_EGL_image_external_essl3, GL_OES_EGL_sync,
    GL_OES_compressed_ETC1_RGB8_texture, GL_OES_copy_image, GL_OES_depth24,
    GL_OES_depth_texture, GL_OES_depth_texture_cube_map,
    GL_OES_draw_buffers_indexed, GL_OES_draw_elements_base_vertex,
    GL_OES_element_index_uint, GL_OES_fbo_render_mipmap,
    GL_OES_geometry_point_size, GL_OES_geometry_shader,
    GL_OES_get_program_binary, GL_OES_gpu_shader5, GL_OES_mapbuffer,
    GL_OES_packed_depth_stencil, GL_OES_primitive_bounding_box,
    GL_OES_required_internalformat, GL_OES_rgb8_rgba8,
    GL_OES_shader_image_atomic, GL_OES_shader_io_blocks,
    GL_OES_standard_derivatives, GL_OES_stencil8, GL_OES_surfaceless_context,
    GL_OES_texture_3D, GL_OES_texture_border_clamp, GL_OES_texture_buffer,
    GL_OES_texture_cube_map_array, GL_OES_texture_float,
    GL_OES_texture_float_linear, GL_OES_texture_half_float,
    GL_OES_texture_half_float_linear, GL_OES_texture_npot,
    GL_OES_texture_stencil8, GL_OES_texture_storage_multisample_2d_array,
    GL_OES_texture_view, GL_OES_vertex_array_object, GL_OES_vertex_half_float,
    GL_OES_viewport_array

2 GLX Visuals
    visual  x   bf lv rg d st  colorbuffer  sr ax dp st accumbuffer  ms  cav
  id dep cl sp  sz l  ci b ro  r  g  b  a F gb bf th cl  r  g  b  a ns b eat
----------------------------------------------------------------------------
0x021 24 tc  0  24  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x043 32 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16  0  0 0 None

2 GLXFBConfigs:
    visual  x   bf lv rg d st  colorbuffer  sr ax dp st accumbuffer  ms  cav
  id dep cl sp  sz l  ci b ro  r  g  b  a F gb bf th cl  r  g  b  a ns b eat
----------------------------------------------------------------------------
0x021 24 tc  0  24  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None
0x043 32 tc  0  32  0 r  y .   8  8  8  8 .  .  0 24  8 16 16 16 16  0 0 None

[sfux@eu-login-50 ~]$

And thank you for sending the link to the troubleshooting page. I am connecting to the remote server with -Y and the plan is to run fsleyes through X11.

Is this no longer possible?

I also tried the following things:

• LIBGL_ALWAYS_SOFTWARE=1 fsleyes -> same error
• LIBGL_ALWAYS_INDIRECT=1 fsleyes -> same error
• unset LIBGL_ALWAYS_INDIRECT and then run fsleyes -> same error

Best regards

Sam

[pauldmccarthy]

Hi @samfux84, did you try running glxgears? It's also worth making sure that you have the latest version of mobaxterm, and/or trying a different X11/SSH client.

I'm afraid I can't really help much here - I find these sort of issues very difficult to solve without having access to the systems in question.

In my experience, X11/SSH has become much less relevant over the past few years - most research institutions that I interact with have moved to noVNC as the preferred method for remote execution of GUI applications. In my experience noVNC is a much nicer solution for the user, and causes much fewer headaches for both the system administrator and software maintainer.

Also relevant is the shift of Linux desktop environments from X11 to Wayland - more recent FSL versions ship with a version of wxPython that is built against Wayland, and so won't work with X11/SSH.

[samfux84]

Thank you for your reply.

glxgears (and also plenty of software that uses X11) works without problems:

We migrated the HPC cluster last year from CentOS 7.9 to Ubuntu 22.04. In the old setup, we had a working FSL 6.0.4 with fsleyes starting without error. Therefore I hoped that we can get fsleyes from FSL 6.0.5 to work on the new setup.

I'm afraid I can't really help much here - I find these sort of issues very difficult to solve without having access to the systems in question.

I can fully understand this.

Also relevant is the shift of Linux desktop environments from X11 to Wayland - more recent FSL versions ship with a version of wxPython that is built against Wayland, and so won't work with X11/SSH.

I am aware of this change regarding the Linux desktop environments. But I am not sure if the same applies for HPC sites. I will try to further investigate the issue and see if I can find a workaround for our user that would like to run fsleyes on the cluster.

Best regards and thank you for your support.

Sam

[pauldmccarthy]

Hi @samfux84, you might have some success installing a separate version of FSLeyes, independent from your FSL installation. You can do this using conda/mamba/micromamba (whichever is more convenient for you), using a command such as the following:

conda create -c conda-forge -p /path/to/fsleyes/environment fsleyes libopengl

For your specific installation you could e.g. replace $FSLDIR/bin/fsleyes with a script that calls this alternative installation.

I think the version of wxpython that will be installed should still support (X11+GLX) / SSH, but you may need to experiment with different wxpython versions, e.g.:

conda create -c conda-forge -p /path/to/fsleyes/environment fsleyes libopengl "wxpython=4.0.7.*" python=3.8
conda create -c conda-forge -p /path/to/fsleyes/environment fsleyes libopengl "wxpython=4.1.*"

(The libopengl package must be specified at the moment due to some recent changes in the way that conda-forge handles OpenGL, but it will not be necessary in the near future.)

[samfux84]

Hi @pauldmccarthy,

Thank you very much for the hint regarding an independent FSLeyes installation. I will give this a try later this week and then report back to you if this resolves the issue.

Best regards

Sam

[samfux84]

Hi @pauldmccarthy,

I installed standalone fsleyes 1.15.0 with pip in a venv, using wxpython 4.2.3 and it worked!

Thank you very much for your help. Please feel free to close this issue.

Best regards

Sam

[pauldmccarthy]

Hi @samfux84, aah great - I hadn't thought of installing FSLeyes via pip - this is a good option, as ultimateily I think that the problem is with the way that conda-forge handles OpenGL.