OpenScad 2019.04.07 hangs on "New" or "Open File" when running in 32bit userspace on 64bit Linux kernel

[KlausKnopper]

Recent issues of openscad (also nightly builds) hang indefinitely in the editor/preview view on 32bit Debian, intel i915 graphics. Stable version 2015.03 built with exactly the same libraries works on the same machine.

strace of version 2019.04.07 keeps looping in
3848 ioctl(11, DRM_IOCTL_I915_GEM_MADVISE, 0xfff0178c) = 0
3848 ioctl(11, DRM_IOCTL_I915_GEM_BUSY, 0xfff01724) = 0
...repeating...

The error might be similar to the previously reported QT5 crash on start issue on Windows machines, though the workaround of changing QT_OPENGL=(anything...) does not work here.

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[t-paul]

Please add the details asked for in that FAQ entry: How_do_I_report_bugs?

That sounds like a tricky one, so we need to collect all the information we can. I don't see how to easily reproduce, or is it reproducable in some VM?

[KlausKnopper]

Hallo Torsten Paul, Same thing happens with the openscad version currently in Debian/unstable (i386), so I'm somewhat puzzled about the fact that I'm the first one to report. I can provide access to a bootable live ISO image by PM on request, for easy testing. With this image, I can reproduce the same behavior in kvm, so it may be unrelated to intel graphics after all. The requested (lengthy) additional information: 1. The OpenSCAD version: 2019.01-RC2 and so far all versions in Debian/unstable since at least february 2019 an openscad-nightly from http://download.opensuse.org/repositories/home:/t-paul/Debian_9.0/ . 2. The Operating System name and version: Debian Debian GNU/Linux buster/sid (i386/32bit) 3. A description of the scenario that produces the issue: Starting openscad and hitting "New" or "Open" from the starter window, the followup openscad window shows editor, preview, console and the new "customizer", and freezes immediately after. The text cursor in the edit window does not blink as usual and text input is not possible. openscad consumes 100% cpu in one thread until killed (force-closing by the window manager does not end the program). 4. In case of graphics issues, the OpenGL driver information: $ glxinfo name of display: :0.0 display: :0 screen: 0 direct rendering: Yes server glx vendor string: SGI server glx version string: 1.4 server glx extensions: GLX_ARB_create_context, GLX_ARB_create_context_no_error, GLX_ARB_create_context_profile, GLX_ARB_fbconfig_float, GLX_ARB_framebuffer_sRGB, GLX_ARB_multisample, GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile, GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB, GLX_EXT_import_context, GLX_EXT_libglvnd, GLX_EXT_no_config_context, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer, GLX_OML_swap_method, GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_SGI_make_current_read, GLX_SGI_swap_control client glx vendor string: Mesa Project and SGI client glx version string: 1.4 client glx extensions: GLX_ARB_context_flush_control, GLX_ARB_create_context, GLX_ARB_create_context_profile, GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float, GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_buffer_age, GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile, GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer, GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control, GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync GLX version: 1.4 GLX extensions: GLX_ARB_create_context, GLX_ARB_create_context_profile, GLX_ARB_fbconfig_float, GLX_ARB_framebuffer_sRGB, GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile, GLX_EXT_fbconfig_packed_float, GLX_EXT_framebuffer_sRGB, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_INTEL_swap_event, GLX_MESA_copy_sub_buffer, GLX_MESA_query_renderer, GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control, GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group, GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync Extended renderer info (GLX_MESA_query_renderer): Vendor: Intel Open Source Technology Center (0x8086) Device: Mesa DRI Intel(R) Ironlake Mobile x86/MMX/SSE2 (0x46) Version: 18.3.6 Accelerated: yes Video memory: 1536MB Unified memory: yes Preferred profile: compat (0x2) Max core profile version: 0.0 Max compat profile version: 2.1 Max GLES1 profile version: 1.1 Max GLES[23] profile version: 2.0 OpenGL vendor string: Intel Open Source Technology Center OpenGL renderer string: Mesa DRI Intel(R) Ironlake Mobile x86/MMX/SSE2 OpenGL version string: 2.1 Mesa 18.3.6 OpenGL shading language version string: 1.20 OpenGL extensions: GL_3DFX_texture_compression_FXT1, GL_AMD_seamless_cubemap_per_texture, GL_AMD_shader_trinary_minmax, GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5, GL_APPLE_object_purgeable, GL_APPLE_packed_pixels, GL_ARB_ES2_compatibility, GL_ARB_arrays_of_arrays, 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_copy_buffer, GL_ARB_copy_image, GL_ARB_debug_output, GL_ARB_depth_buffer_float, GL_ARB_depth_clamp, GL_ARB_depth_texture, GL_ARB_draw_buffers, GL_ARB_draw_elements_base_vertex, GL_ARB_draw_instanced, GL_ARB_explicit_attrib_location, GL_ARB_explicit_uniform_location, GL_ARB_fragment_coord_conventions, GL_ARB_fragment_program, GL_ARB_fragment_program_shadow, GL_ARB_fragment_shader, GL_ARB_framebuffer_object, GL_ARB_framebuffer_sRGB, GL_ARB_get_program_binary, GL_ARB_get_texture_sub_image, 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_multisample, GL_ARB_multitexture, GL_ARB_occlusion_query, GL_ARB_occlusion_query2, GL_ARB_pixel_buffer_object, GL_ARB_point_parameters, GL_ARB_point_sprite, GL_ARB_polygon_offset_clamp, 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_bit_encoding, GL_ARB_shader_draw_parameters, GL_ARB_shader_group_vote, GL_ARB_shader_objects, GL_ARB_shader_texture_lod, GL_ARB_shading_language_100, GL_ARB_shading_language_packing, GL_ARB_shadow, GL_ARB_sync, GL_ARB_texture_barrier, GL_ARB_texture_border_clamp, GL_ARB_texture_compression, GL_ARB_texture_compression_rgtc, 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_filter_anisotropic, GL_ARB_texture_float, GL_ARB_texture_mirror_clamp_to_edge, GL_ARB_texture_mirrored_repeat, GL_ARB_texture_non_power_of_two, GL_ARB_texture_query_lod, GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui, GL_ARB_texture_storage, GL_ARB_texture_swizzle, GL_ARB_transpose_matrix, GL_ARB_vertex_array_bgra, GL_ARB_vertex_array_object, 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_window_pos, GL_ATI_blend_equation_separate, GL_ATI_draw_buffers, GL_ATI_separate_stencil, GL_ATI_texture_env_combine3, GL_ATI_texture_float, 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_draw_buffers2, GL_EXT_draw_instanced, GL_EXT_draw_range_elements, GL_EXT_fog_coord, GL_EXT_framebuffer_blit, GL_EXT_framebuffer_object, GL_EXT_framebuffer_sRGB, GL_EXT_gpu_program_parameters, 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_polygon_offset_clamp, GL_EXT_provoking_vertex, GL_EXT_rescale_normal, GL_EXT_secondary_color, GL_EXT_separate_specular_color, GL_EXT_shader_framebuffer_fetch_non_coherent, 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_compression_dxt1, 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_object, GL_EXT_texture_rectangle, GL_EXT_texture_sRGB, GL_EXT_texture_sRGB_decode, GL_EXT_texture_shared_exponent, GL_EXT_texture_snorm, GL_EXT_texture_swizzle, GL_EXT_timer_query, GL_EXT_vertex_array, GL_EXT_vertex_array_bgra, GL_IBM_multimode_draw_arrays, GL_IBM_rasterpos_clip, GL_IBM_texture_mirrored_repeat, GL_INGR_blend_func_separate, GL_KHR_blend_equation_advanced, GL_KHR_context_flush_control, GL_KHR_debug, GL_KHR_no_error, GL_KHR_robustness, GL_MESA_pack_invert, GL_MESA_texture_signed_rgba, GL_MESA_window_pos, GL_NV_blend_square, GL_NV_conditional_render, GL_NV_depth_clamp, GL_NV_fog_distance, GL_NV_light_max_exponent, GL_NV_packed_depth_stencil, GL_NV_primitive_restart, GL_NV_texgen_reflection, GL_NV_texture_barrier, 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 2.0 Mesa 18.3.6 OpenGL ES profile shading language version string: OpenGL ES GLSL ES 1.0.16 OpenGL ES profile extensions: GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5, GL_APPLE_texture_max_level, GL_EXT_blend_minmax, GL_EXT_compressed_ETC1_RGB8_sub_texture, GL_EXT_discard_framebuffer, GL_EXT_draw_buffers, GL_EXT_draw_elements_base_vertex, GL_EXT_frag_depth, GL_EXT_map_buffer_range, GL_EXT_multi_draw_arrays, GL_EXT_occlusion_query_boolean, GL_EXT_polygon_offset_clamp, GL_EXT_read_format_bgra, GL_EXT_robustness, GL_EXT_separate_shader_objects, GL_EXT_shader_framebuffer_fetch_non_coherent, GL_EXT_texture_border_clamp, GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_s3tc, GL_EXT_texture_filter_anisotropic, GL_EXT_texture_format_BGRA8888, GL_EXT_texture_rg, GL_EXT_texture_type_2_10_10_10_REV, GL_EXT_unpack_subimage, GL_KHR_blend_equation_advanced, GL_KHR_context_flush_control, GL_KHR_debug, GL_KHR_no_error, GL_KHR_robustness, GL_NV_draw_buffers, GL_NV_fbo_color_attachments, GL_NV_read_buffer, GL_NV_read_depth, GL_NV_read_depth_stencil, GL_NV_read_stencil, GL_OES_EGL_image, GL_OES_EGL_image_external, GL_OES_EGL_sync, GL_OES_compressed_ETC1_RGB8_texture, GL_OES_depth24, GL_OES_depth_texture, GL_OES_draw_elements_base_vertex, GL_OES_element_index_uint, GL_OES_fbo_render_mipmap, GL_OES_get_program_binary, GL_OES_mapbuffer, GL_OES_packed_depth_stencil, GL_OES_required_internalformat, GL_OES_rgb8_rgba8, GL_OES_standard_derivatives, GL_OES_stencil8, GL_OES_surfaceless_context, GL_OES_texture_3D, GL_OES_texture_border_clamp, 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_vertex_array_object, GL_OES_vertex_half_float 46 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 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None 0x022 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None 0x0a8 24 tc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 0 0 None 0x0a9 24 tc 0 32 0 r . . 8 8 8 8 . . 0 0 0 0 0 0 0 0 0 None 0x0aa 24 tc 0 32 0 r . . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None 0x0ab 24 tc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 0 0 None 0x0ac 24 tc 0 24 0 r . . 8 8 8 0 . . 0 0 0 0 0 0 0 0 0 None 0x0ad 24 tc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None 0x0ae 24 tc 0 24 0 r . . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None 0x0af 24 tc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None 0x0b0 24 tc 0 32 0 r . . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None 0x0b1 24 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None 0x0b2 24 tc 0 32 0 r . . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None 0x0b3 24 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None 0x0b4 24 tc 0 32 0 r y . 8 8 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32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None 0x08d 24 dc 0 32 0 r . . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None 0x08e 24 dc 0 24 0 r y . 8 8 8 0 . . 0 0 0 0 0 0 0 0 0 None 0x08f 24 dc 0 24 0 r . . 8 8 8 0 . . 0 0 0 0 0 0 0 0 0 None 0x090 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None 0x091 24 dc 0 24 0 r . . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None 0x092 24 dc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None 0x093 24 dc 0 32 0 r . . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None 0x094 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None 0x095 24 dc 0 32 0 r . . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None 0x096 0 dc 0 16 0 r y . 5 6 5 0 . . 0 16 0 0 0 0 0 0 0 None 0x097 0 dc 0 16 0 r y . 5 6 5 0 . . 0 16 0 16 16 16 0 0 0 Slow 0x098 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None 0x099 24 dc 0 32 0 r y . 8 8 8 8 . . 0 24 8 16 16 16 16 0 0 Slow 0x09a 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 0 0 0 0 0 0 None 0x09b 24 dc 0 24 0 r y . 8 8 8 0 . . 0 24 8 16 16 16 0 0 0 Slow 0x09c 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None 0x09d 24 dc 0 32 0 r y . 8 8 8 8 . s 0 24 8 16 16 16 16 0 0 Slow 0x09e 32 tc 0 32 0 r y . 8 8 8 8 . . 0 0 0 0 0 0 0 0 0 None 0x09f 32 tc 0 32 0 r . . 8 8 8 8 . . 0 0 0 0 0 0 0 0 0 None 0x0a0 32 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None 0x0a1 32 tc 0 32 0 r . . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None 0x0a2 32 tc 0 32 0 r y . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None 0x0a3 32 tc 0 32 0 r . . 8 8 8 8 . s 0 0 0 0 0 0 0 0 0 None 0x0a4 32 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None 0x0a5 32 tc 0 32 0 r . . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None 0x0a6 32 tc 0 32 0 r y . 8 8 8 8 . . 0 24 8 0 0 0 0 0 0 None 0x0a7 32 tc 0 32 0 r y . 8 8 8 8 . s 0 24 8 0 0 0 0 0 0 None $ es2_info EGL_VERSION: 1.4 EGL_VENDOR: Mesa Project EGL_EXTENSIONS: EGL_ANDROID_blob_cache, EGL_ANDROID_native_fence_sync, EGL_CHROMIUM_sync_control, EGL_EXT_image_dma_buf_import, EGL_EXT_image_dma_buf_import_modifiers, EGL_KHR_config_attribs, EGL_KHR_create_context, EGL_KHR_create_context_no_error, EGL_KHR_fence_sync, EGL_KHR_get_all_proc_addresses, EGL_KHR_gl_colorspace, EGL_KHR_gl_renderbuffer_image, EGL_KHR_gl_texture_2D_image, EGL_KHR_gl_texture_3D_image, EGL_KHR_gl_texture_cubemap_image, EGL_KHR_image, EGL_KHR_image_base, EGL_KHR_image_pixmap, EGL_KHR_no_config_context, EGL_KHR_reusable_sync, EGL_KHR_surfaceless_context, EGL_EXT_pixel_format_float, EGL_KHR_wait_sync, EGL_MESA_configless_context, EGL_MESA_drm_image, EGL_MESA_image_dma_buf_export, EGL_NOK_swap_region, EGL_NOK_texture_from_pixmap, EGL_NV_post_sub_buffer, EGL_WL_bind_wayland_display EGL_CLIENT_APIS: OpenGL OpenGL_ES GL_VERSION: OpenGL ES 2.0 Mesa 18.3.6 GL_RENDERER: Mesa DRI Intel(R) Ironlake Mobile x86/MMX/SSE2 GL_EXTENSIONS: GL_EXT_blend_minmax, GL_EXT_multi_draw_arrays, GL_EXT_texture_filter_anisotropic, GL_EXT_texture_compression_s3tc, GL_EXT_occlusion_query_boolean, GL_EXT_texture_compression_dxt1, GL_EXT_texture_format_BGRA8888, GL_OES_compressed_ETC1_RGB8_texture, GL_OES_depth24, GL_OES_element_index_uint, GL_OES_fbo_render_mipmap, GL_OES_mapbuffer, GL_OES_rgb8_rgba8, GL_OES_standard_derivatives, GL_OES_stencil8, GL_OES_texture_3D, 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_vertex_half_float, GL_OES_EGL_image, GL_OES_depth_texture, GL_OES_packed_depth_stencil, GL_EXT_texture_type_2_10_10_10_REV, GL_OES_get_program_binary, GL_APPLE_texture_max_level, GL_EXT_discard_framebuffer, GL_EXT_read_format_bgra, GL_EXT_frag_depth, GL_NV_fbo_color_attachments, GL_OES_EGL_image_external, GL_OES_EGL_sync, GL_OES_vertex_array_object, GL_ANGLE_texture_compression_dxt3, GL_ANGLE_texture_compression_dxt5, GL_EXT_robustness, GL_EXT_texture_rg, GL_EXT_unpack_subimage, GL_NV_draw_buffers, GL_NV_read_buffer, GL_NV_read_depth, GL_NV_read_depth_stencil, GL_NV_read_stencil, GL_EXT_draw_buffers, GL_EXT_map_buffer_range, GL_KHR_debug, GL_KHR_robustness, GL_OES_required_internalformat, GL_OES_surfaceless_context, GL_EXT_separate_shader_objects, GL_EXT_compressed_ETC1_RGB8_sub_texture, GL_EXT_draw_elements_base_vertex, GL_EXT_polygon_offset_clamp, GL_EXT_texture_border_clamp, GL_KHR_blend_equation_advanced, GL_KHR_context_flush_control, GL_OES_draw_elements_base_vertex, GL_OES_texture_border_clamp, GL_KHR_no_error, GL_EXT_shader_framebuffer_fetch_non_coherent 5. If possible, a trimmed down script reproducing the issue: echo 'cube(10);' > test.scad openscad test.scad Regards -Klaus

…

On 14.04.19, Torsten Paul wrote: Please add the details asked for in that FAQ entry: [1]How_do_I_report_bugs? That sounds like a tricky one, so we need to collect all the information we can. I don't see how to easily reproduce, or is it reproducable in some VM? — You are receiving this because you authored the thread. Reply to this email directly, [2]view it on GitHub, or [3]mute the thread. References Visible links 1. https://en.wikibooks.org/wiki/OpenSCAD_User_Manual/FAQ#How_do_I_report_bugs? 2. #2933 (comment) 3. https://github.com/notifications/unsubscribe-auth/AEeakSTxW548bZATdmyHAJIDIrPEuJYgks5vg1tCgaJpZM4cuE_C

[t-paul]

I can't reproduce on a fresh installed debian-unstable, so an ISO showing the issue would be useful. I think that installed Gnome on Wayland, not sure if that is important.

Linux debian-unstable-32bit 4.19.0-4-686-pae #1 SMP Debian 4.19.28-2 (2019-03-15) i686 GNU/Linux

Library Info... (interesting memory amount ;-)

OpenSCAD Version: 2019.01-RC2
System information: Linux 4.19.0-4-686-pae #1 SMP Debian 4.19.28-2 (2019-03-15) i686 Debian GNU/Linux buster/sid 2 CPUs 16777216.00 TB RAM
User Agent: OpenSCAD/2019.01-RC2 (Linux i686; Debian GNU/Linux buster/sid)
Compiler: GCC "8.3.0" 32bit
MinGW build: No
Debug build: No
Boost version: 1_67
Eigen version: 3.3.7
CGAL version, kernels: 4.13, Cartesian, Extended_cartesian, Epeck
OpenCSG version: OpenCSG 1.4.2
Qt version: 5.11.3
QScintilla version: 2.10.4
InputDrivers: 
GLib version: 2.58.3
lodepng version: 20180910
libzip version: 1.5.1
fontconfig version: 2.13.1
freetype version: 2.9.1
harfbuzz version: 2.3.1
lib3mf version: 1.8.1

GLEW version: 2.1.0
OpenGL Version: 3.1 Mesa 18.3.4
GL Renderer: llvmpipe (LLVM 7.0, 128 bits)
GL Vendor: VMware, Inc.
RGBA(8880), depth(0), stencil(0)
GL_ARB_framebuffer_object: yes
GL_EXT_framebuffer_object: yes
GL_EXT_packed_depth_stencil: yes

Qt graphics widget: QOpenGLWidget
QSurfaceFormat: RGBA(8880), depth(0), stencil(0)

[donbright]

does it work with software rendering? (Is that even still a thing?)

IIRC you can test by running this:

 $ LIBGL_ALWAYS_SOFTWARE=1 openscad

[KlausKnopper]

LIBGL_ALWAYS_SOFTWARE=1 openscad-nightly

hangs the same way.

[t-paul]

Yes, I'm seeing that in my test VM too. I'm a bit stuck as it's not reproducible on a "normal" 32bit Debian VM. The only item remaining on my idea list is to get an AppImage going for 32bit and see what that is doing when run the Knoppix image.

[KlausKnopper]

Hello Torsten, After tons of testing, library updates/downgrades and compiles from source, I can narrow down a possible cause. A) Booting Knoppix with the (default) 64bit kernel on a 64bit architecture, but running the (default) 32bit userspace including 32bit openscad -> openscad hangs when opening the editor/preview window. This is the case you also observed when booting the Knoppix image in a 64bit VM (which will autoselect the 64 bit kernel and run in 32bit compatibility mode). B) Booting Knoppix with the (manually typed in the boot comamndline "knoppix") 32bit kernel on a 64bit architecture, running the (default) 32bit userspace including 32bit openscad -> openscad works when opening the editor/preview window. C) Booting Knoppix on a 32bit architecture with 32bit kernel and 32bit userspace -> openscad works when opening the editor/preview window. All cases with the same openscad 32bit Debian/Linux installation version 2019-RC1 or RC2 or nightly. In scenario A), where openscad hangs (64bit kernel and 32bit userspace on 64bit hardware), its is not sufficient to start openscad by: setarch i386 openscad , it will still hang the same way. Usually, the setarch i386 trick, which is also changing the output of uname -a, works fine solving bitness problems with software trying to determine wheter to use 64 or 32bit builtin instructions. Browsing the openscad source, I did not find any bitness-specific code yet, but I may have missed issues that assume kernel-architecture == userspace architecture without explicit check. Running the 32bit kernel on 64bit platforms, only supporting 4GB of RAM, or installing a 63bit userspace environment which won't work on 32bit computers, is no option. So it seems do narrow down to openscad having problems with mixed kernel vs. userspace bitness starting from versions higher than (probably) the 2015 editions which still worked in scenario A. Regards -Klaus

…

On 02.05.19, Torsten Paul wrote: Yes, I'm seeing that in my test VM too. I'm a bit stuck as it's not reproducible on a "normal" 32bit Debian VM. The only item remaining on my idea list is to get an AppImage going for 32bit and see what that is doing when run the Knoppix image. — You are receiving this because you authored the thread. Reply to this email directly, [1]view it on GitHub, or [2]mute the thread. References Visible links 1. #2933 (comment) 2. https://github.com/notifications/unsubscribe-auth/ABDZVEL24NCSACT6RVTZO4LPTL3IDANCNFSM4HFYJ7BA

[KlausKnopper]

Changed issue topic to reflect the recent findings.

[t-paul]

I still can't reproduce in any development environment. I've now installed a Debian 10/32-bit VM and updated the kernel to an amd64 variant.
Interestingly that totally broke booting into gdm so that seems to be affected by the issue too. After installing lxdm graphical login was possible. Compiling and running current master of OpenSCAD on that system works fine.

[KlausKnopper]

Hello Torsten, In the very same environment you mentioned (Debian 10 32bit running on a Debian 64bit kernel including modules), openscad hangs for me when opening the main (editor/Preview) window (the "intro" window is still responsive). Are you sure that the 64bit kernel was actually booted in your VM? (uname -a) Debian will normally refuse to install a 64bit kernel package on a 32bit system, unless you added the 64bit architecture package option or did a force install. Also, aside from the kernel, did you also install the kernel modules? If not, this may explain why Gnome failed to work: the accellerated graphics (KMS) modules are missing, so the system max fall back to VESA, and you end up with a fallback window manager. Running the 32bit openscad version in a 32bit environment and a 32bit kernel works. Since you mentioned you compiled openscad from the git master branch: I did this a while ago, but later ran most tests from the Debian 32bit package you provided at http://download.opensuse.org/repositories/home:/t-paul/Debian_Unstable/ . To make sure that I didn't miss an important change in the source, I now checked out the git master branch again and compiled it by myself, but the result is unfortunately still the same. Regards -Klaus

…

On 24.10.19, Torsten Paul wrote: I still can't reproduce in any development environment. I've now installed a Debian 10/32-bit VM and updated the kernel to an amd64 variant. Interestingly that totally broke booting into gdm so that seems to be affected by the issue too. After installing lxdm graphical login was possible. Compiling and running current master of OpenSCAD on that system works fine. — You are receiving this because you authored the thread. Reply to this email directly, [1]view it on GitHub, or [2]unsubscribe. References Visible links 1. #2933?email_source=notifications&email_token=ABDZVEK55LLJLH5KRNCSY2TQQHO5FA5CNFSM4HFYJ7BKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOECF4YDA#issuecomment-546032652 2. https://github.com/notifications/unsubscribe-auth/ABDZVEIKLLJB5EQ7FRJ5L43QQHO5FANCNFSM4HFYJ7BA

[t-paul]

Yep, I did:

dpkg --add-architecture amd64
apt-get update
apt-get --no-install-recommends install linux-image-amd64:amd64
uname -a
Linux debian10-32bit 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u1 (2019-09-20) x86_64 GNU/Linux

But maybe later booted into the wrong kernel again. I can now reproduce the issue and it seems it hangs inside swrast_dri.so. OpenSCAD does run when disabling the axis markers but the display is still not correct.
Unfortunately I don't think there's much that can be done on OpenSCAD side to fix the issue. Maybe there's a way to disable DRI but I could not find a setting for that yet.

[KlausKnopper]

Hi Torsten, I'm glad that you are now finally able to reproduce the problem in a - more or less - "standard" Debian setup with mixed Kernel/userspace bitness; I was almost wondering if I was missing some compile time option. Disabling the axis markers manually in openscads config file before starting, indeed delays the freezing to a certain point before rendering an object. But since all other programs using DRI, including more complex graphics like tuxracer, blender etc. work flawlessly in the same setup, I don't think the bug is related to DRI or software rastering itself. Also, the old openscad version 2015.3 will run nicely without rendering problems with and without hardware-supported DRI, no freezes, using the same X11 and library versions with the possible exception of (editor) libqt5scintilla2 (just install openscad and libqt5scintilla2 from Debian/oldstable in your test setup), which makes me think that the newer versions of openscad must do something different in the preview window rendering than 2015.3 did. Regards -Klaus

…

On 24.10.19, Torsten Paul wrote: Yep, I did: dpkg --add-architecture amd64 apt-get update apt-get --no-install-recommends install linux-image-amd64:amd64 uname -a Linux debian10-32bit 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u1 (2019-09-20) x86_64 GNU/Linux But maybe later booted into the wrong kernel again. I can now reproduce the issue and it seems it hangs inside swrast_dri.so. OpenSCAD does run when disabling the axis markers but the display is still not correct. Unfortunately I don't think there's much that can be done on OpenSCAD side to fix the issue. Maybe there's a way to disable DRI but I could not find a setting for that yet.

[t-paul]

True, it's triggered by a change in OpenSCAD. Other applications are probably not a good reference as OpenSCAD still uses ancient OpenGL, partially even fixed pipeline which is probably (hopefully?) not used much anymore.
I tried to check with RenderDoc but this requires OpenGL 3.2+ context. So it might be OpenSCAD doing something wrong with the API but without tools that's going to be hard to find. Maybe someone reading this has pointers to other ways of validating OpenGL API calls?