Käsittääkseni aivan samoin kuin antamassasi linkissä:
glxinfo | grep render
direct rendering: Yes
OpenGL renderer string: GeForce GT 520/PCIe/SSE2
GL_NV_conditional_render, GL_NV_copy_depth_to_color, GL_NV_copy_image,
GL_NV_parameter_buffer_object2, GL_NV_path_rendering,
GL_NVX_conditional_render, GL_NVX_gpu_memory_info, GL_OES_depth24,
GL_OES_fbo_render_mipmap, GL_OES_get_program_binary, GL_OES_mapbuffer,