Hello all, I'm starting to use HOpenGL, but have hit a brick wall. Whatever I do, GLUT always fails to initialize with the following error: X Error of failed request: BadWindow (invalid Window parameter) Major opcode of failed request: 20 (X_GetProperty) Resource id in failed request: 0x1a0003e Serial number of failed request: 22 Current serial number in output stream: 22 I've tried everything I can think of; clearing the ~/.cabal and ~/.ghc dirs and compiling everything anew, reinstalling the whole Haskell platform, etc. The system I'm using is running Kubuntu x86_64 10.10 with nVidia drivers, KDE 4.5.1, kWin with the oxygen engine, on two monitors using nVidia's Xinerama replacement (forgetting the name). Every other conceivable OpenGL application, using GLUT, lwjgl, Qt, or GTK, works flawlessly, both compiled from scratch and from third parties. My GLX info string is at the end of this email. The program used for testing is trivial: module Main (main) where import Graphics.Rendering.OpenGLimport Graphics.UI.GLUT main = do _ <- getArgsAndInitialize -- Initialization fails here createWindow "OpenGL Test" displayCallback $= clear [ColorBuffer] mainLoop Using either my 32-bit Ubuntu laptop or a 32-bit Arch/KDE system, the equivalent setup works perfectly and I'm able to run the program. Any help would be greatly appreciated. Cheers, David Flemström GLX info string: 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_swap_control, GLX_EXT_texture_from_pixmap, GLX_ARB_create_context, GLX_ARB_create_context_profile, GLX_EXT_create_context_es2_profile, GLX_ARB_create_context_robustness, GLX_ARB_multisample, GLX_NV_float_buffer, GLX_ARB_fbconfig_float, GLX_EXT_framebuffer_sRGB 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_EXT_swap_control, GLX_ARB_create_context, GLX_ARB_create_context_profile, GLX_NV_float_buffer, GLX_ARB_fbconfig_float, GLX_EXT_fbconfig_packed_float, GLX_EXT_texture_from_pixmap, GLX_EXT_framebuffer_sRGB, GLX_NV_present_video, GLX_NV_copy_image, GLX_NV_multisample_coverage, GLX_NV_video_capture, GLX_EXT_create_context_es2_profile, GLX_ARB_create_context_robustness GLX version: 1.4 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_swap_control, GLX_EXT_texture_from_pixmap, GLX_ARB_create_context, GLX_ARB_create_context_profile, GLX_EXT_create_context_es2_profile, GLX_ARB_create_context_robustness, GLX_ARB_multisample, GLX_NV_float_buffer, GLX_ARB_fbconfig_float, GLX_EXT_framebuffer_sRGB, GLX_ARB_get_proc_address OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce 8800 GTX/PCI/SSE2 OpenGL version string: 3.3.0 NVIDIA 260.19.06 OpenGL shading language version string: 3.30 NVIDIA via Cg compiler OpenGL extensions: GL_ARB_blend_func_extended, GL_ARB_color_buffer_float, GL_ARB_compatibility, GL_ARB_copy_buffer, 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_ES2_compatibility, GL_ARB_explicit_attrib_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_geometry_shader4, GL_ARB_get_program_binary, GL_ARB_half_float_pixel, GL_ARB_half_float_vertex, GL_ARB_imaging, GL_ARB_instanced_arrays, GL_ARB_map_buffer_range, 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_provoking_vertex, GL_ARB_robustness, GL_ARB_sampler_objects, GL_ARB_seamless_cube_map, GL_ARB_separate_shader_objects, GL_ARB_shader_bit_encoding, GL_ARB_shader_objects, GL_ARB_shading_language_100, GL_ARB_shadow, GL_ARB_sync, GL_ARB_texture_border_clamp, GL_ARB_texture_buffer_object, 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_float, GL_ARB_texture_mirrored_repeat, GL_ARB_texture_multisample, GL_ARB_texture_non_power_of_two, GL_ARB_texture_rectangle, GL_ARB_texture_rg, GL_ARB_texture_rgb10_a2ui, GL_ARB_texture_swizzle, GL_ARB_timer_query, GL_ARB_transpose_matrix, GL_ARB_uniform_buffer_object, GL_ARB_vertex_array_bgra, GL_ARB_vertex_array_object, GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_ARB_vertex_shader, GL_ARB_vertex_type_2_10_10_10_rev, GL_ARB_viewport_array, GL_ARB_window_pos, GL_ATI_draw_buffers, GL_ATI_texture_float, GL_ATI_texture_mirror_once, GL_S3_s3tc, GL_EXT_texture_env_add, GL_EXT_abgr, GL_EXT_bgra, GL_EXT_bindable_uniform, 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_Cg_shader, 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_EXTX_framebuffer_mixed_formats, GL_EXT_framebuffer_object, GL_EXT_framebuffer_sRGB, GL_EXT_geometry_shader4, 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_shader_objects, GL_EXT_separate_specular_color, GL_EXT_shadow_funcs, GL_EXT_stencil_two_side, GL_EXT_stencil_wrap, GL_EXT_texture3D, GL_EXT_texture_array, GL_EXT_texture_buffer_object, 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_combine, GL_EXT_texture_env_dot3, GL_EXT_texture_filter_anisotropic, GL_EXT_texture_integer, GL_EXT_texture_lod, GL_EXT_texture_lod_bias, GL_EXT_texture_mirror_clamp, GL_EXT_texture_object, GL_EXT_texture_shared_exponent, GL_EXT_texture_sRGB, GL_EXT_texture_swizzle, GL_EXT_timer_query, GL_EXT_vertex_array, GL_EXT_vertex_array_bgra, GL_IBM_rasterpos_clip, GL_IBM_texture_mirrored_repeat, GL_KTX_buffer_region, GL_NV_blend_square, GL_NV_conditional_render, GL_NV_copy_depth_to_color, GL_NV_copy_image, GL_NV_depth_buffer_float, GL_NV_depth_clamp, GL_NV_explicit_multisample, GL_NV_fence, GL_NV_float_buffer, GL_NV_fog_distance, GL_NV_fragment_program, GL_NV_fragment_program_option, GL_NV_fragment_program2, GL_NV_framebuffer_multisample_coverage, GL_NV_geometry_shader4, GL_NV_gpu_program4, GL_NV_half_float, GL_NV_light_max_exponent, GL_NV_multisample_coverage, GL_NV_multisample_filter_hint, GL_NV_occlusion_query, GL_NV_packed_depth_stencil, GL_NV_parameter_buffer_object, GL_NV_parameter_buffer_object2, GL_NV_pixel_data_range, GL_NV_point_sprite, GL_NV_primitive_restart, GL_NV_register_combiners, GL_NV_register_combiners2, GL_NV_shader_buffer_load, GL_NV_texgen_reflection, GL_NV_texture_barrier, GL_NV_texture_compression_vtc, GL_NV_texture_env_combine4, GL_NV_texture_expand_normal, GL_NV_texture_multisample, GL_NV_texture_rectangle, GL_NV_texture_shader, GL_NV_texture_shader2, GL_NV_texture_shader3, GL_NV_transform_feedback, GL_NV_vertex_array_range, GL_NV_vertex_array_range2, GL_NV_vertex_buffer_unified_memory, GL_NV_vertex_program, GL_NV_vertex_program1_1, GL_NV_vertex_program2, GL_NV_vertex_program2_option, GL_NV_vertex_program3, GL_NVX_conditional_render, GL_NVX_gpu_memory_info, GL_SGIS_generate_mipmap, GL_SGIS_texture_lod, GL_SGIX_depth_texture, GL_SGIX_shadow, GL_SUN_slice_accum