Nvidia GT635M, Ubuntu 14.04: unable to turn VSYNC ON

Hi there.

I have a notebook ASUS K56C with Nvidia GeForce 635M and an integrated Intel video cards.
I am running Ubuntu 14.04 and I have Nvidia driver 331.49 version installed from the packages.
The problem is that all OpenGL apps have huge FPS which causes awful tearing and glitches.
I know it can be solved gracefully by enabling VSYNC ON, but I do not have that option available on Ubuntu in nvidia-settings app.
Moreover, I’ve been experimenting with some OpenGL tiny programs, tried to enable VSYNC by using ““glXSwapIntervalEXT(dy, drawable, 1)””. It gets invoked correctly, but has no impact on the application (i.e. I see that the FPS remains really large, say, 1200-1500 FPS or alike). I still have VSYNC disabled and, as a result, bad tearing.

as for my glxinfo output, here it is:

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_ARB_create_context, GLX_ARB_create_context_profile,
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float,
    GLX_ARB_multisample, GLX_EXT_buffer_age,
    GLX_EXT_create_context_es2_profile, GLX_EXT_create_context_es_profile,
    GLX_EXT_framebuffer_sRGB, GLX_EXT_swap_control, GLX_EXT_swap_control_tear,
    GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating,
    GLX_NV_float_buffer, GLX_NV_multisample_coverage, GLX_SGIX_fbconfig,
    GLX_SGIX_pbuffer, GLX_SGI_swap_control, GLX_SGI_video_sync
    client glx vendor string: NVIDIA Corporation
    client glx version string: 1.4
    client glx extensions:
    GLX_ARB_create_context, GLX_ARB_create_context_profile,
    GLX_ARB_create_context_robustness, GLX_ARB_fbconfig_float,
    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_swap_control, GLX_EXT_swap_control_tear,
    GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating,
    GLX_NV_copy_image, GLX_NV_float_buffer, GLX_NV_multisample_coverage,
    GLX_NV_present_video, GLX_NV_swap_group, GLX_NV_video_capture,
    GLX_NV_video_out, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer,
    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_create_context_robustness, GLX_ARB_fbconfig_float,
    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_framebuffer_sRGB, GLX_EXT_swap_control, GLX_EXT_swap_control_tear,
    GLX_EXT_texture_from_pixmap, GLX_EXT_visual_info, GLX_EXT_visual_rating,
    GLX_NV_float_buffer, GLX_NV_multisample_coverage, GLX_SGIX_fbconfig,
    GLX_SGIX_pbuffer, GLX_SGI_swap_control, GLX_SGI_video_sync
    OpenGL vendor string: NVIDIA Corporation
    OpenGL renderer string: GeForce GT 635M/PCIe/SSE2
    OpenGL core profile version string: 4.3.0 NVIDIA 331.113
    OpenGL core profile shading language version string: 4.30 NVIDIA via Cg compiler
    OpenGL core profile context flags: (none)
    OpenGL core profile profile mask: core profile
    OpenGL core profile extensions:
    GL_AMD_multi_draw_indirect, GL_ARB_ES2_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_color_buffer_float, GL_ARB_compressed_texture_pixel_storage,
    GL_ARB_compute_shader, GL_ARB_compute_variable_group_size,
    GL_ARB_conservative_depth, 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_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_geometry_shader4, GL_ARB_get_program_binary, GL_ARB_gpu_shader5,
    GL_ARB_gpu_shader_fp64, GL_ARB_half_float_pixel, GL_ARB_half_float_vertex,
    GL_ARB_imaging, GL_ARB_indirect_parameters, 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_pixel_buffer_object,
    GL_ARB_point_parameters, GL_ARB_point_sprite,
    GL_ARB_program_interface_query, GL_ARB_provoking_vertex,
    GL_ARB_query_buffer_object, GL_ARB_robust_buffer_access_behavior,
    GL_ARB_robustness, GL_ARB_sample_shading, GL_ARB_sampler_objects,
    GL_ARB_seamless_cube_map, GL_ARB_separate_shader_objects,
    GL_ARB_shader_atomic_counters, GL_ARB_shader_bit_encoding,
    GL_ARB_shader_draw_parameters, GL_ARB_shader_group_vote,
    GL_ARB_shader_image_load_store, GL_ARB_shader_image_size,
    GL_ARB_shader_objects, GL_ARB_shader_precision,
    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_sparse_texture,
    GL_ARB_stencil_texturing, GL_ARB_sync, GL_ARB_tessellation_shader,
    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_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_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_draw_buffers,
    GL_ATI_texture_float, GL_ATI_texture_mirror_once,
    GL_EXTX_framebuffer_mixed_formats, GL_EXT_Cg_shader, 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_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_geometry_shader4,
    GL_EXT_gpu_program_parameters, GL_EXT_gpu_shader4,
    GL_EXT_import_sync_object, 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_shader_image_load_store, 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_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, GL_EXT_texture_lod_bias,
    GL_EXT_texture_mirror_clamp, GL_EXT_texture_object, GL_EXT_texture_sRGB,
    GL_EXT_texture_sRGB_decode, GL_EXT_texture_shared_exponent,
    GL_EXT_texture_storage, GL_EXT_texture_swizzle, GL_EXT_timer_query,
    GL_EXT_transform_feedback2, GL_EXT_vertex_array, GL_EXT_vertex_array_bgra,
    GL_EXT_vertex_attrib_64bit, GL_EXT_x11_sync_object, GL_IBM_rasterpos_clip,
    GL_IBM_texture_mirrored_repeat, GL_KHR_debug, GL_KTX_buffer_region,
    GL_NVX_conditional_render, GL_NVX_gpu_memory_info,
    GL_NV_ES1_1_compatibility, GL_NV_bindless_multi_draw_indirect,
    GL_NV_blend_equation_advanced, GL_NV_blend_square, GL_NV_compute_program5,
    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_draw_texture,
    GL_NV_explicit_multisample, GL_NV_fence, GL_NV_float_buffer,
    GL_NV_fog_distance, GL_NV_fragment_program, GL_NV_fragment_program2,
    GL_NV_fragment_program_option, GL_NV_framebuffer_multisample_coverage,
    GL_NV_geometry_shader4, GL_NV_gpu_program4, GL_NV_gpu_program4_1,
    GL_NV_gpu_program5, GL_NV_gpu_program5_mem_extended,
    GL_NV_gpu_program_fp64, GL_NV_gpu_shader5, 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_path_rendering,
    GL_NV_pixel_data_range, GL_NV_point_sprite, GL_NV_primitive_restart,
    GL_NV_register_combiners, GL_NV_register_combiners2,
    GL_NV_shader_atomic_counters, GL_NV_shader_atomic_float,
    GL_NV_shader_buffer_load, GL_NV_shader_storage_buffer_object,
    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_transform_feedback2, GL_NV_vdpau_interop, GL_NV_vertex_array_range,
    GL_NV_vertex_array_range2, GL_NV_vertex_attrib_integer_64bit,
    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_S3_s3tc,
    GL_SGIS_generate_mipmap, GL_SGIS_texture_lod, GL_SGIX_depth_texture,
    GL_SGIX_shadow, GL_SUN_slice_accum

    OpenGL version string: 4.4.0 NVIDIA 331.113
    OpenGL shading language version string: 4.40 NVIDIA via Cg compiler
    OpenGL context flags: (none)
    OpenGL profile mask: (none)
    OpenGL extensions:
    GL_AMD_multi_draw_indirect, GL_ARB_ES2_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_color_buffer_float, GL_ARB_compatibility,
    GL_ARB_compressed_texture_pixel_storage, GL_ARB_compute_shader,
    GL_ARB_compute_variable_group_size, GL_ARB_conservative_depth,
    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_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_geometry_shader4, GL_ARB_get_program_binary, GL_ARB_gpu_shader5,
    GL_ARB_gpu_shader_fp64, GL_ARB_half_float_pixel, GL_ARB_half_float_vertex,
    GL_ARB_imaging, GL_ARB_indirect_parameters, 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_pixel_buffer_object,
    GL_ARB_point_parameters, GL_ARB_point_sprite,
    GL_ARB_program_interface_query, GL_ARB_provoking_vertex,
    GL_ARB_query_buffer_object, GL_ARB_robust_buffer_access_behavior,
    GL_ARB_robustness, GL_ARB_sample_shading, GL_ARB_sampler_objects,
    GL_ARB_seamless_cube_map, GL_ARB_separate_shader_objects,
    GL_ARB_shader_atomic_counters, GL_ARB_shader_bit_encoding,
    GL_ARB_shader_draw_parameters, GL_ARB_shader_group_vote,
    GL_ARB_shader_image_load_store, GL_ARB_shader_image_size,
    GL_ARB_shader_objects, GL_ARB_shader_precision,
    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_sparse_texture,
    GL_ARB_stencil_texturing, GL_ARB_sync, GL_ARB_tessellation_shader,
    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_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_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_draw_buffers,
    GL_ATI_texture_float, GL_ATI_texture_mirror_once,
    GL_EXTX_framebuffer_mixed_formats, GL_EXT_Cg_shader, 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_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_geometry_shader4,
    GL_EXT_gpu_program_parameters, GL_EXT_gpu_shader4,
    GL_EXT_import_sync_object, 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_shader_image_load_store, 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_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, GL_EXT_texture_lod_bias,
    GL_EXT_texture_mirror_clamp, GL_EXT_texture_object, GL_EXT_texture_sRGB,
    GL_EXT_texture_sRGB_decode, GL_EXT_texture_shared_exponent,
    GL_EXT_texture_storage, GL_EXT_texture_swizzle, GL_EXT_timer_query,
    GL_EXT_transform_feedback2, GL_EXT_vertex_array, GL_EXT_vertex_array_bgra,
    GL_EXT_vertex_attrib_64bit, GL_EXT_x11_sync_object, GL_IBM_rasterpos_clip,
    GL_IBM_texture_mirrored_repeat, GL_KHR_debug, GL_KTX_buffer_region,
    GL_NVX_conditional_render, GL_NVX_gpu_memory_info,
    GL_NV_ES1_1_compatibility, GL_NV_bindless_multi_draw_indirect,
    GL_NV_blend_equation_advanced, GL_NV_blend_square, GL_NV_compute_program5,
    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_draw_texture,
    GL_NV_explicit_multisample, GL_NV_fence, GL_NV_float_buffer,
    GL_NV_fog_distance, GL_NV_fragment_program, GL_NV_fragment_program2,
    GL_NV_fragment_program_option, GL_NV_framebuffer_multisample_coverage,
    GL_NV_geometry_shader4, GL_NV_gpu_program4, GL_NV_gpu_program4_1,
    GL_NV_gpu_program5, GL_NV_gpu_program5_mem_extended,
    GL_NV_gpu_program_fp64, GL_NV_gpu_shader5, 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_path_rendering,
    GL_NV_pixel_data_range, GL_NV_point_sprite, GL_NV_primitive_restart,
    GL_NV_register_combiners, GL_NV_register_combiners2,
    GL_NV_shader_atomic_counters, GL_NV_shader_atomic_float,
    GL_NV_shader_buffer_load, GL_NV_shader_storage_buffer_object,
    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_transform_feedback2, GL_NV_vdpau_interop, GL_NV_vertex_array_range,
    GL_NV_vertex_array_range2, GL_NV_vertex_attrib_integer_64bit,
    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_S3_s3tc,
    GL_SGIS_generate_mipmap, GL_SGIS_texture_lod, GL_SGIX_depth_texture,
    GL_SGIX_shadow, GL_SUN_slice_accum

    228 GLX Visuals

    ...

According to the oputput ““glXSwapIntervalEXT”” is available for my video card.

Could you clarify, is it possible at all to enable VSYNC ON on my notebook and if yes, why executing ““glXSwapIntervalEXT”” makes no changes? I’ll be glad to provide more details regarding my hardware and software settings.

Thank you.