Hi,

when i try to use a shader, simply nothing happens to the image. I also get no 'linking' message.

here is the log:

[pix_video]: video driver 0: video4linux2 v4l2 [pix_video]: video driver 1: video4linux v4l [pix_video]: video driver 2: ieee1394 dv4l dv v4l2: changed size from 64x64 to 640x480 v4l2: GEM: pix_video: Opened video connection 0x9 [glsl_vertex]: shader 'shader/bunt.vert' will be loaded when rendering is turned on (openGL context needed) [glsl_fragment]: shader 'shader/bunt.frag' will be loaded when rendering is turned on (openGL context needed) GEM: Direct Rendering enabled! GEM: GLEW version 1.5.1 GEM: Start rendering v4l2: GEM: pix_video: Opened video connection 0x9

--- no output after that

when i send the print message to gemwin, everything looks fine:

GEM information --------------- OpenGL info Vendor: NVIDIA Corporation Renderer: GeForce 9800 GT/PCI/SSE2 Version: 3.3.0 NVIDIA 260.19.06 Extensions: GL_ARB_blend_func_extended Extensions: GL_ARB_color_buffer_float Extensions: GL_ARB_compatibility Extensions: GL_ARB_copy_buffer Extensions: GL_ARB_depth_buffer_float Extensions: GL_ARB_depth_clamp Extensions: GL_ARB_depth_texture Extensions: GL_ARB_draw_buffers Extensions: GL_ARB_draw_elements_base_vertex Extensions: GL_ARB_draw_instanced Extensions: GL_ARB_ES2_compatibility Extensions: GL_ARB_explicit_attrib_location Extensions: GL_ARB_fragment_coord_conventions Extensions: GL_ARB_fragment_program Extensions: GL_ARB_fragment_program_shadow Extensions: GL_ARB_fragment_shader Extensions: GL_ARB_framebuffer_object Extensions: GL_ARB_framebuffer_sRGB Extensions: GL_ARB_geometry_shader4 Extensions: GL_ARB_get_program_binary Extensions: GL_ARB_half_float_pixel Extensions: GL_ARB_half_float_vertex Extensions: GL_ARB_imaging Extensions: GL_ARB_instanced_arrays Extensions: GL_ARB_map_buffer_range Extensions: GL_ARB_multisample Extensions: GL_ARB_multitexture Extensions: GL_ARB_occlusion_query Extensions: GL_ARB_occlusion_query2 Extensions: GL_ARB_pixel_buffer_object Extensions: GL_ARB_point_parameters Extensions: GL_ARB_point_sprite Extensions: GL_ARB_provoking_vertex Extensions: GL_ARB_robustness Extensions: GL_ARB_sampler_objects Extensions: GL_ARB_seamless_cube_map Extensions: GL_ARB_separate_shader_objects Extensions: GL_ARB_shader_bit_encoding Extensions: GL_ARB_shader_objects Extensions: GL_ARB_shading_language_100 Extensions: GL_ARB_shadow Extensions: GL_ARB_sync Extensions: GL_ARB_texture_border_clamp Extensions: GL_ARB_texture_buffer_object Extensions: GL_ARB_texture_compression Extensions: GL_ARB_texture_compression_rgtc Extensions: GL_ARB_texture_cube_map Extensions: GL_ARB_texture_env_add Extensions: GL_ARB_texture_env_combine Extensions: GL_ARB_texture_env_crossbar Extensions: GL_ARB_texture_env_dot3 Extensions: GL_ARB_texture_float Extensions: GL_ARB_texture_mirrored_repeat Extensions: GL_ARB_texture_multisample Extensions: GL_ARB_texture_non_power_of_two Extensions: GL_ARB_texture_rectangle Extensions: GL_ARB_texture_rg Extensions: GL_ARB_texture_rgb10_a2ui Extensions: GL_ARB_texture_swizzle Extensions: GL_ARB_timer_query Extensions: GL_ARB_transpose_matrix Extensions: GL_ARB_uniform_buffer_object Extensions: GL_ARB_vertex_array_bgra Extensions: GL_ARB_vertex_array_object Extensions: GL_ARB_vertex_buffer_object Extensions: GL_ARB_vertex_program Extensions: GL_ARB_vertex_shader Extensions: GL_ARB_vertex_type_2_10_10_10_rev Extensions: GL_ARB_viewport_array Extensions: GL_ARB_window_pos Extensions: GL_ATI_draw_buffers Extensions: GL_ATI_texture_float Extensions: GL_ATI_texture_mirror_once Extensions: GL_S3_s3tc Extensions: GL_EXT_texture_env_add Extensions: GL_EXT_abgr Extensions: GL_EXT_bgra Extensions: GL_EXT_bindable_uniform Extensions: GL_EXT_blend_color Extensions: GL_EXT_blend_equation_separate Extensions: GL_EXT_blend_func_separate Extensions: GL_EXT_blend_minmax Extensions: GL_EXT_blend_subtract Extensions: GL_EXT_compiled_vertex_array Extensions: GL_EXT_Cg_shader Extensions: GL_EXT_depth_bounds_test Extensions: GL_EXT_direct_state_access Extensions: GL_EXT_draw_buffers2 Extensions: GL_EXT_draw_instanced Extensions: GL_EXT_draw_range_elements Extensions: GL_EXT_fog_coord Extensions: GL_EXT_framebuffer_blit Extensions: GL_EXT_framebuffer_multisample Extensions: GL_EXTX_framebuffer_mixed_formats Extensions: GL_EXT_framebuffer_object Extensions: GL_EXT_framebuffer_sRGB Extensions: GL_EXT_geometry_shader4 Extensions: GL_EXT_gpu_program_parameters Extensions: GL_EXT_gpu_shader4 Extensions: GL_EXT_multi_draw_arrays Extensions: GL_EXT_packed_depth_stencil Extensions: GL_EXT_packed_float Extensions: GL_EXT_packed_pixels Extensions: GL_EXT_pixel_buffer_object Extensions: GL_EXT_point_parameters Extensions: GL_EXT_provoking_vertex Extensions: GL_EXT_rescale_normal Extensions: GL_EXT_secondary_color Extensions: GL_EXT_separate_shader_objects Extensions: GL_EXT_separate_specular_color Extensions: GL_EXT_shadow_funcs Extensions: GL_EXT_stencil_two_side Extensions: GL_EXT_stencil_wrap Extensions: GL_EXT_texture3D Extensions: GL_EXT_texture_array Extensions: GL_EXT_texture_buffer_object Extensions: GL_EXT_texture_compression_latc Extensions: GL_EXT_texture_compression_rgtc Extensions: GL_EXT_texture_compression_s3tc Extensions: GL_EXT_texture_cube_map Extensions: GL_EXT_texture_edge_clamp Extensions: GL_EXT_texture_env_combine Extensions: GL_EXT_texture_env_dot3 Extensions: GL_EXT_texture_filter_anisotropic Extensions: GL_EXT_texture_integer Extensions: GL_EXT_texture_lod Extensions: GL_EXT_texture_lod_bias Extensions: GL_EXT_texture_mirror_clamp Extensions: GL_EXT_texture_object Extensions: GL_EXT_texture_shared_exponent Extensions: GL_EXT_texture_sRGB Extensions: GL_EXT_texture_swizzle Extensions: GL_EXT_timer_query Extensions: GL_EXT_vertex_array Extensions: GL_EXT_vertex_array_bgra Extensions: GL_IBM_rasterpos_clip Extensions: GL_IBM_texture_mirrored_repeat Extensions: GL_KTX_buffer_region Extensions: GL_NV_blend_square Extensions: GL_NV_conditional_render Extensions: GL_NV_copy_depth_to_color Extensions: GL_NV_copy_image Extensions: GL_NV_depth_buffer_float Extensions: GL_NV_depth_clamp Extensions: GL_NV_explicit_multisample Extensions: GL_NV_fence Extensions: GL_NV_float_buffer Extensions: GL_NV_fog_distance Extensions: GL_NV_fragment_program Extensions: GL_NV_fragment_program_option Extensions: GL_NV_fragment_program2 Extensions: GL_NV_framebuffer_multisample_coverage Extensions: GL_NV_geometry_shader4 Extensions: GL_NV_gpu_program4 Extensions: GL_NV_half_float Extensions: GL_NV_light_max_exponent Extensions: GL_NV_multisample_coverage Extensions: GL_NV_multisample_filter_hint Extensions: GL_NV_occlusion_query Extensions: GL_NV_packed_depth_stencil Extensions: GL_NV_parameter_buffer_object Extensions: GL_NV_parameter_buffer_object2 Extensions: GL_NV_pixel_data_range Extensions: GL_NV_point_sprite Extensions: GL_NV_primitive_restart Extensions: GL_NV_register_combiners Extensions: GL_NV_register_combiners2 Extensions: GL_NV_shader_buffer_load Extensions: GL_NV_texgen_reflection Extensions: GL_NV_texture_barrier Extensions: GL_NV_texture_compression_vtc Extensions: GL_NV_texture_env_combine4 Extensions: GL_NV_texture_expand_normal Extensions: GL_NV_texture_multisample Extensions: GL_NV_texture_rectangle Extensions: GL_NV_texture_shader Extensions: GL_NV_texture_shader2 Extensions: GL_NV_texture_shader3 Extensions: GL_NV_transform_feedback Extensions: GL_NV_vdpau_interop Extensions: GL_NV_vertex_array_range Extensions: GL_NV_vertex_array_range2 Extensions: GL_NV_vertex_buffer_unified_memory Extensions: GL_NV_vertex_program Extensions: GL_NV_vertex_program1_1 Extensions: GL_NV_vertex_program2 Extensions: GL_NV_vertex_program2_option Extensions: GL_NV_vertex_program3 Extensions: GL_NVX_conditional_render Extensions: GL_NVX_gpu_memory_info Extensions: GL_SGIS_generate_mipmap Extensions: GL_SGIS_texture_lod Extensions: GL_SGIX_depth_texture Extensions: GL_SGIX_shadow Extensions: GL_SUN_slice_accum --------------- window state: 1 topmost: 0 profile: 0 buffer: 2 stereo: 0 full screen: 0 width: 960, height 720 offset: 0+0 frame rate: 25.000000 red: 8 green: 8 blue: 8 max texture: 8192 lighting 0 rectangle texturing: 2 direct yuv texturing: 0

Has anyone experienced this before and knows a solution?

regards, mrks