drm test works with intel but not Nvidia

[beew]

I built freshplayerplugin (commit 4a29ab5 before issue #366) and used it with Chrome OS's flash for the drm test at http://drmtest2.adobe.com:8080/SVP/SampleVideoPlayer_FP.html
(Firefox 57)

It works in one machine with intel GPU (ivybridge mobile) but not in another with the discrete Nvidia GPU (gtx1070), the box just keep spinning forever, disabling/enabling vdpau makes no difference.

OS is Ubuntu 16.04.3 64 bits in both cases

[i-rinat]

I have no machines with NVIDIA adapters readily available, so can't reproduce the bug in any way.

[beew]

Hi, thanks for the reply

Too bad you can't access a NVidia card,
But FWIW if I run firefox in the terminal and go try the test I get

Parent 4340, Gecko_IOThread] WARNING: pipe error (133): Connection reset by peer: file /build/firefox-bfYN6l/firefox-57.0.1+build2/ipc/chromium/src/chrome/common/ipc_channel_posix.cc, line 353
NOT SANDBOXED
[fresh  4539] not implemented: PPB_OpenGLES2VertexArrayObject;1.0
[fresh  4539] not implemented: PPB_OpenGLES2DrawBuffers(Dev);1.0
[fresh  4539] not implemented: PPB_BrokerTrusted;0.3
[fresh  4539] not implemented: PPB_AudioOutput(Dev);0.1

and glxinfo gives

$ glxinfo
name of display: :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_context_flush_control, GLX_ARB_create_context, 
    GLX_ARB_create_context_no_error, 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_import_context, GLX_EXT_libglvnd, 
    GLX_EXT_stereo_tree, 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_delay_before_swap, GLX_NV_float_buffer, 
    GLX_NV_robustness_video_memory_purge, 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_context_flush_control, GLX_ARB_create_context, 
    GLX_ARB_create_context_no_error, 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_stereo_tree, 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_buffer, 
    GLX_NV_copy_image, GLX_NV_delay_before_swap, GLX_NV_float_buffer, 
    GLX_NV_multisample_coverage, GLX_NV_present_video, 
    GLX_NV_robustness_video_memory_purge, 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_context_flush_control, GLX_ARB_create_context, 
    GLX_ARB_create_context_no_error, 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_import_context, GLX_EXT_stereo_tree, 
    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_delay_before_swap, GLX_NV_float_buffer, 
    GLX_NV_robustness_video_memory_purge, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, 
    GLX_SGI_swap_control, GLX_SGI_video_sync
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce GTX 1070/PCIe/SSE2
OpenGL core profile version string: 4.5.0 NVIDIA 387.26
OpenGL core profile shading language version string: 4.50 NVIDIA
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL core profile extensions:
    GL_AMD_multi_draw_indirect, GL_AMD_seamless_cubemap_per_texture, 
    GL_AMD_vertex_shader_layer, GL_AMD_vertex_shader_viewport_index, 
    GL_ARB_ES2_compatibility, GL_ARB_ES3_1_compatibility, 
    GL_ARB_ES3_2_compatibility, GL_ARB_ES3_compatibility, 
    GL_ARB_arrays_of_arrays, GL_ARB_base_instance, GL_ARB_bindless_texture, 
    GL_ARB_blend_func_extended, 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_compute_shader, GL_ARB_compute_variable_group_size, 
    GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth, 
    GL_ARB_copy_buffer, GL_ARB_copy_image, GL_ARB_cull_distance, 
    GL_ARB_debug_output, GL_ARB_depth_buffer_float, GL_ARB_depth_clamp, 
    GL_ARB_depth_texture, GL_ARB_derivative_control, 
    GL_ARB_direct_state_access, 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_fragment_shader_interlock, 
    GL_ARB_framebuffer_no_attachments, GL_ARB_framebuffer_object, 
    GL_ARB_framebuffer_sRGB, GL_ARB_geometry_shader4, 
    GL_ARB_get_program_binary, GL_ARB_get_texture_sub_image, GL_ARB_gl_spirv, 
    GL_ARB_gpu_shader5, GL_ARB_gpu_shader_fp64, GL_ARB_gpu_shader_int64, 
    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_parallel_shader_compile, 
    GL_ARB_pipeline_statistics_query, GL_ARB_pixel_buffer_object, 
    GL_ARB_point_parameters, GL_ARB_point_sprite, GL_ARB_polygon_offset_clamp, 
    GL_ARB_post_depth_coverage, 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_locations, GL_ARB_sample_shading, GL_ARB_sampler_objects, 
    GL_ARB_seamless_cube_map, GL_ARB_seamless_cubemap_per_texture, 
    GL_ARB_separate_shader_objects, GL_ARB_shader_atomic_counter_ops, 
    GL_ARB_shader_atomic_counters, GL_ARB_shader_ballot, 
    GL_ARB_shader_bit_encoding, GL_ARB_shader_clock, 
    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_image_samples, GL_ARB_shader_texture_lod, 
    GL_ARB_shader_viewport_layer_array, 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_buffer, 
    GL_ARB_sparse_texture, GL_ARB_sparse_texture2, 
    GL_ARB_sparse_texture_clamp, GL_ARB_spirv_extensions, 
    GL_ARB_stencil_texturing, GL_ARB_sync, GL_ARB_tessellation_shader, 
    GL_ARB_texture_barrier, 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_filter_anisotropic, GL_ARB_texture_filter_minmax, 
    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_transform_feedback_overflow_query, 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_memory_object, GL_EXT_memory_object_fd, 
    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_post_depth_coverage, GL_EXT_provoking_vertex, 
    GL_EXT_raster_multisample, GL_EXT_rescale_normal, GL_EXT_secondary_color, 
    GL_EXT_semaphore, GL_EXT_semaphore_fd, GL_EXT_separate_shader_objects, 
    GL_EXT_separate_specular_color, GL_EXT_shader_image_load_formatted, 
    GL_EXT_shader_image_load_store, GL_EXT_shader_integer_mix, 
    GL_EXT_shadow_funcs, GL_EXT_sparse_texture2, 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_filter_minmax, 
    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_window_rectangles, 
    GL_EXT_x11_sync_object, GL_IBM_rasterpos_clip, 
    GL_IBM_texture_mirrored_repeat, GL_KHR_blend_equation_advanced, 
    GL_KHR_blend_equation_advanced_coherent, GL_KHR_context_flush_control, 
    GL_KHR_debug, GL_KHR_no_error, GL_KHR_parallel_shader_compile, 
    GL_KHR_robust_buffer_access_behavior, GL_KHR_robustness, 
    GL_KTX_buffer_region, GL_NVX_blend_equation_advanced_multi_draw_buffers, 
    GL_NVX_conditional_render, GL_NVX_gpu_memory_info, GL_NVX_nvenc_interop, 
    GL_NV_ES1_1_compatibility, GL_NV_ES3_1_compatibility, 
    GL_NV_alpha_to_coverage_dither_control, GL_NV_bindless_multi_draw_indirect, 
    GL_NV_bindless_multi_draw_indirect_count, GL_NV_bindless_texture, 
    GL_NV_blend_equation_advanced, GL_NV_blend_equation_advanced_coherent, 
    GL_NV_blend_minmax_factor, GL_NV_blend_square, GL_NV_clip_space_w_scaling, 
    GL_NV_command_list, GL_NV_compute_program5, GL_NV_conditional_render, 
    GL_NV_conservative_raster, GL_NV_conservative_raster_dilate, 
    GL_NV_conservative_raster_pre_snap_triangles, 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_draw_vulkan_image, GL_NV_explicit_multisample, 
    GL_NV_fence, GL_NV_fill_rectangle, GL_NV_float_buffer, 
    GL_NV_fog_distance, GL_NV_fragment_coverage_to_color, 
    GL_NV_fragment_program, GL_NV_fragment_program2, 
    GL_NV_fragment_program_option, GL_NV_fragment_shader_interlock, 
    GL_NV_framebuffer_mixed_samples, GL_NV_framebuffer_multisample_coverage, 
    GL_NV_geometry_shader4, GL_NV_geometry_shader_passthrough, 
    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_internalformat_sample_query, 
    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_path_rendering_shared_edge, GL_NV_pixel_data_range, 
    GL_NV_point_sprite, GL_NV_primitive_restart, GL_NV_query_resource, 
    GL_NV_query_resource_tag, GL_NV_register_combiners, 
    GL_NV_register_combiners2, GL_NV_robustness_video_memory_purge, 
    GL_NV_sample_locations, GL_NV_sample_mask_override_coverage, 
    GL_NV_shader_atomic_counters, GL_NV_shader_atomic_float, 
    GL_NV_shader_atomic_float64, GL_NV_shader_atomic_fp16_vector, 
    GL_NV_shader_atomic_int64, GL_NV_shader_buffer_load, 
    GL_NV_shader_storage_buffer_object, GL_NV_shader_thread_group, 
    GL_NV_shader_thread_shuffle, GL_NV_stereo_view_rendering, 
    GL_NV_texgen_reflection, GL_NV_texture_barrier, 
    GL_NV_texture_compression_vtc, GL_NV_texture_env_combine4, 
    GL_NV_texture_multisample, GL_NV_texture_rectangle, 
    GL_NV_texture_rectangle_compressed, GL_NV_texture_shader, 
    GL_NV_texture_shader2, GL_NV_texture_shader3, GL_NV_transform_feedback, 
    GL_NV_transform_feedback2, GL_NV_uniform_buffer_unified_memory, 
    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_NV_viewport_array2, GL_NV_viewport_swizzle, 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: 4.6.0 NVIDIA 387.26
OpenGL shading language version string: 4.60 NVIDIA
OpenGL context flags: (none)
OpenGL profile mask: (none)
OpenGL extensions:
    GL_AMD_multi_draw_indirect, GL_AMD_seamless_cubemap_per_texture, 
    GL_AMD_vertex_shader_layer, GL_AMD_vertex_shader_viewport_index, 
    GL_ARB_ES2_compatibility, GL_ARB_ES3_1_compatibility, 
    GL_ARB_ES3_2_compatibility, GL_ARB_ES3_compatibility, 
    GL_ARB_arrays_of_arrays, GL_ARB_base_instance, GL_ARB_bindless_texture, 
    GL_ARB_blend_func_extended, GL_ARB_buffer_storage, 
    GL_ARB_clear_buffer_object, GL_ARB_clear_texture, GL_ARB_clip_control, 
    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_conditional_render_inverted, 
    GL_ARB_conservative_depth, GL_ARB_copy_buffer, GL_ARB_copy_image, 
    GL_ARB_cull_distance, GL_ARB_debug_output, GL_ARB_depth_buffer_float, 
    GL_ARB_depth_clamp, GL_ARB_depth_texture, GL_ARB_derivative_control, 
    GL_ARB_direct_state_access, 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_fragment_shader_interlock, 
    GL_ARB_framebuffer_no_attachments, GL_ARB_framebuffer_object, 
    GL_ARB_framebuffer_sRGB, GL_ARB_geometry_shader4, 
    GL_ARB_get_program_binary, GL_ARB_get_texture_sub_image, GL_ARB_gl_spirv, 
    GL_ARB_gpu_shader5, GL_ARB_gpu_shader_fp64, GL_ARB_gpu_shader_int64, 
    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_parallel_shader_compile, 
    GL_ARB_pipeline_statistics_query, GL_ARB_pixel_buffer_object, 
    GL_ARB_point_parameters, GL_ARB_point_sprite, GL_ARB_polygon_offset_clamp, 
    GL_ARB_post_depth_coverage, 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_locations, GL_ARB_sample_shading, GL_ARB_sampler_objects, 
    GL_ARB_seamless_cube_map, GL_ARB_seamless_cubemap_per_texture, 
    GL_ARB_separate_shader_objects, GL_ARB_shader_atomic_counter_ops, 
    GL_ARB_shader_atomic_counters, GL_ARB_shader_ballot, 
    GL_ARB_shader_bit_encoding, GL_ARB_shader_clock, 
    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_image_samples, GL_ARB_shader_texture_lod, 
    GL_ARB_shader_viewport_layer_array, 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_buffer, 
    GL_ARB_sparse_texture, GL_ARB_sparse_texture2, 
    GL_ARB_sparse_texture_clamp, GL_ARB_spirv_extensions, 
    GL_ARB_stencil_texturing, GL_ARB_sync, GL_ARB_tessellation_shader, 
    GL_ARB_texture_barrier, 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_filter_anisotropic, GL_ARB_texture_filter_minmax, 
    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_transform_feedback_overflow_query, 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_memory_object, GL_EXT_memory_object_fd, 
    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_post_depth_coverage, GL_EXT_provoking_vertex, 
    GL_EXT_raster_multisample, GL_EXT_rescale_normal, GL_EXT_secondary_color, 
    GL_EXT_semaphore, GL_EXT_semaphore_fd, GL_EXT_separate_shader_objects, 
    GL_EXT_separate_specular_color, GL_EXT_shader_image_load_formatted, 
    GL_EXT_shader_image_load_store, GL_EXT_shader_integer_mix, 
    GL_EXT_shadow_funcs, GL_EXT_sparse_texture2, 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_filter_minmax, 
    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_window_rectangles, 
    GL_EXT_x11_sync_object, GL_IBM_rasterpos_clip, 
    GL_IBM_texture_mirrored_repeat, GL_KHR_blend_equation_advanced, 
    GL_KHR_blend_equation_advanced_coherent, GL_KHR_context_flush_control, 
    GL_KHR_debug, GL_KHR_no_error, GL_KHR_parallel_shader_compile, 
    GL_KHR_robust_buffer_access_behavior, GL_KHR_robustness, 
    GL_KTX_buffer_region, GL_NVX_blend_equation_advanced_multi_draw_buffers, 
    GL_NVX_conditional_render, GL_NVX_gpu_memory_info, GL_NVX_nvenc_interop, 
    GL_NV_ES1_1_compatibility, GL_NV_ES3_1_compatibility, 
    GL_NV_alpha_to_coverage_dither_control, GL_NV_bindless_multi_draw_indirect, 
    GL_NV_bindless_multi_draw_indirect_count, GL_NV_bindless_texture, 
    GL_NV_blend_equation_advanced, GL_NV_blend_equation_advanced_coherent, 
    GL_NV_blend_minmax_factor, GL_NV_blend_square, GL_NV_clip_space_w_scaling, 
    GL_NV_command_list, GL_NV_compute_program5, GL_NV_conditional_render, 
    GL_NV_conservative_raster, GL_NV_conservative_raster_dilate, 
    GL_NV_conservative_raster_pre_snap_triangles, 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_draw_vulkan_image, GL_NV_explicit_multisample, 
    GL_NV_fence, GL_NV_fill_rectangle, GL_NV_float_buffer, 
    GL_NV_fog_distance, GL_NV_fragment_coverage_to_color, 
    GL_NV_fragment_program, GL_NV_fragment_program2, 
    GL_NV_fragment_program_option, GL_NV_fragment_shader_interlock, 
    GL_NV_framebuffer_mixed_samples, GL_NV_framebuffer_multisample_coverage, 
    GL_NV_geometry_shader4, GL_NV_geometry_shader_passthrough, 
    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_internalformat_sample_query, 
    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_path_rendering_shared_edge, GL_NV_pixel_data_range, 
    GL_NV_point_sprite, GL_NV_primitive_restart, GL_NV_query_resource, 
    GL_NV_query_resource_tag, GL_NV_register_combiners, 
    GL_NV_register_combiners2, GL_NV_robustness_video_memory_purge, 
    GL_NV_sample_locations, GL_NV_sample_mask_override_coverage, 
    GL_NV_shader_atomic_counters, GL_NV_shader_atomic_float, 
    GL_NV_shader_atomic_float64, GL_NV_shader_atomic_fp16_vector, 
    GL_NV_shader_atomic_int64, GL_NV_shader_buffer_load, 
    GL_NV_shader_storage_buffer_object, GL_NV_shader_thread_group, 
    GL_NV_shader_thread_shuffle, GL_NV_stereo_view_rendering, 
    GL_NV_texgen_reflection, GL_NV_texture_barrier, 
    GL_NV_texture_compression_vtc, GL_NV_texture_env_combine4, 
    GL_NV_texture_multisample, GL_NV_texture_rectangle, 
    GL_NV_texture_rectangle_compressed, GL_NV_texture_shader, 
    GL_NV_texture_shader2, GL_NV_texture_shader3, GL_NV_transform_feedback, 
    GL_NV_transform_feedback2, GL_NV_uniform_buffer_unified_memory, 
    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_NV_viewport_array2, GL_NV_viewport_swizzle, GL_S3_s3tc, 
    GL_SGIS_generate_mipmap, GL_SGIS_texture_lod, GL_SGIX_depth_texture, 
    GL_SGIX_shadow, GL_SUN_slice_accum

OpenGL ES profile version string: OpenGL ES 3.2 NVIDIA 387.26
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20
OpenGL ES profile extensions:
    GL_ANDROID_extension_pack_es31a, GL_EXT_base_instance, 
    GL_EXT_blend_func_extended, GL_EXT_blend_minmax, GL_EXT_buffer_storage, 
    GL_EXT_clear_texture, GL_EXT_clip_cull_distance, 
    GL_EXT_color_buffer_float, GL_EXT_color_buffer_half_float, 
    GL_EXT_compressed_ETC1_RGB8_sub_texture, GL_EXT_conservative_depth, 
    GL_EXT_copy_image, GL_EXT_debug_label, GL_EXT_discard_framebuffer, 
    GL_EXT_disjoint_timer_query, GL_EXT_draw_buffers_indexed, 
    GL_EXT_draw_elements_base_vertex, GL_EXT_draw_transform_feedback, 
    GL_EXT_float_blend, GL_EXT_frag_depth, GL_EXT_geometry_point_size, 
    GL_EXT_geometry_shader, GL_EXT_gpu_shader5, GL_EXT_map_buffer_range, 
    GL_EXT_memory_object, GL_EXT_memory_object_fd, GL_EXT_multi_draw_indirect, 
    GL_EXT_multisample_compatibility, GL_EXT_occlusion_query_boolean, 
    GL_EXT_polygon_offset_clamp, GL_EXT_post_depth_coverage, 
    GL_EXT_primitive_bounding_box, GL_EXT_raster_multisample, 
    GL_EXT_render_snorm, GL_EXT_robustness, GL_EXT_sRGB, 
    GL_EXT_sRGB_write_control, GL_EXT_semaphore, GL_EXT_semaphore_fd, 
    GL_EXT_separate_shader_objects, GL_EXT_shader_group_vote, 
    GL_EXT_shader_implicit_conversions, GL_EXT_shader_integer_mix, 
    GL_EXT_shader_io_blocks, GL_EXT_shader_non_constant_global_initializers, 
    GL_EXT_shader_texture_lod, GL_EXT_shadow_samplers, GL_EXT_sparse_texture, 
    GL_EXT_sparse_texture2, GL_EXT_tessellation_point_size, 
    GL_EXT_tessellation_shader, GL_EXT_texture_border_clamp, 
    GL_EXT_texture_buffer, GL_EXT_texture_compression_bptc, 
    GL_EXT_texture_compression_dxt1, GL_EXT_texture_compression_rgtc, 
    GL_EXT_texture_compression_s3tc, GL_EXT_texture_cube_map_array, 
    GL_EXT_texture_filter_anisotropic, GL_EXT_texture_filter_minmax, 
    GL_EXT_texture_format_BGRA8888, GL_EXT_texture_norm16, GL_EXT_texture_rg, 
    GL_EXT_texture_sRGB_R8, GL_EXT_texture_sRGB_decode, 
    GL_EXT_texture_storage, GL_EXT_texture_view, GL_EXT_unpack_subimage, 
    GL_EXT_window_rectangles, GL_KHR_blend_equation_advanced, 
    GL_KHR_blend_equation_advanced_coherent, GL_KHR_context_flush_control, 
    GL_KHR_debug, GL_KHR_no_error, GL_KHR_parallel_shader_compile, 
    GL_KHR_robust_buffer_access_behavior, GL_KHR_robustness, 
    GL_NVX_blend_equation_advanced_multi_draw_buffers, GL_NV_bgr, 
    GL_NV_bindless_texture, GL_NV_blend_equation_advanced, 
    GL_NV_blend_equation_advanced_coherent, GL_NV_blend_minmax_factor, 
    GL_NV_clip_space_w_scaling, GL_NV_conditional_render, 
    GL_NV_conservative_raster, GL_NV_conservative_raster_pre_snap_triangles, 
    GL_NV_copy_buffer, GL_NV_copy_image, GL_NV_draw_buffers, 
    GL_NV_draw_instanced, GL_NV_draw_texture, GL_NV_draw_vulkan_image, 
    GL_NV_explicit_attrib_location, GL_NV_fbo_color_attachments, 
    GL_NV_fill_rectangle, GL_NV_fragment_coverage_to_color, 
    GL_NV_fragment_shader_interlock, GL_NV_framebuffer_blit, 
    GL_NV_framebuffer_mixed_samples, GL_NV_framebuffer_multisample, 
    GL_NV_generate_mipmap_sRGB, GL_NV_geometry_shader_passthrough, 
    GL_NV_gpu_shader5, GL_NV_image_formats, GL_NV_instanced_arrays, 
    GL_NV_internalformat_sample_query, GL_NV_non_square_matrices, 
    GL_NV_occlusion_query_samples, GL_NV_pack_subimage, GL_NV_packed_float, 
    GL_NV_packed_float_linear, GL_NV_path_rendering, 
    GL_NV_path_rendering_shared_edge, GL_NV_pixel_buffer_object, 
    GL_NV_polygon_mode, GL_NV_read_buffer, GL_NV_read_depth, 
    GL_NV_read_depth_stencil, GL_NV_read_stencil, GL_NV_sRGB_formats, 
    GL_NV_sample_locations, GL_NV_sample_mask_override_coverage, 
    GL_NV_shader_atomic_fp16_vector, GL_NV_shader_noperspective_interpolation, 
    GL_NV_shadow_samplers_array, GL_NV_shadow_samplers_cube, 
    GL_NV_stereo_view_rendering, GL_NV_texture_array, GL_NV_texture_barrier, 
    GL_NV_texture_border_clamp, GL_NV_texture_compression_latc, 
    GL_NV_texture_compression_s3tc, GL_NV_texture_compression_s3tc_update, 
    GL_NV_timer_query, GL_NV_viewport_array, GL_NV_viewport_array2, 
    GL_NV_viewport_swizzle, GL_OES_compressed_ETC1_RGB8_texture, 
    GL_OES_copy_image, GL_OES_depth24, GL_OES_depth32, GL_OES_depth_texture, 
    GL_OES_depth_texture_cube_map, GL_OES_draw_buffers_indexed, 
    GL_OES_draw_elements_base_vertex, GL_OES_element_index_uint, 
    GL_OES_fbo_render_mipmap, GL_OES_geometry_point_size, 
    GL_OES_geometry_shader, GL_OES_get_program_binary, GL_OES_gpu_shader5, 
    GL_OES_mapbuffer, GL_OES_packed_depth_stencil, 
    GL_OES_primitive_bounding_box, GL_OES_rgb8_rgba8, GL_OES_sample_shading, 
    GL_OES_sample_variables, GL_OES_shader_image_atomic, 
    GL_OES_shader_io_blocks, GL_OES_shader_multisample_interpolation, 
    GL_OES_standard_derivatives, GL_OES_tessellation_point_size, 
    GL_OES_tessellation_shader, GL_OES_texture_border_clamp, 
    GL_OES_texture_buffer, GL_OES_texture_cube_map_array, 
    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_texture_stencil8, 
    GL_OES_texture_storage_multisample_2d_array, GL_OES_texture_view, 
    GL_OES_vertex_array_object, GL_OES_vertex_half_float, 
    GL_OES_viewport_array

Maybe this will give you an idea?

Thanks.

[i-rinat]

Nope, not really.

That "pipe error" usually means plugin crashed, but there is no information about why it crashed and how.

[i-rinat]

Borrowed a machine with NVIDIA GTX 980, got there Debian testing installed (NVIDIA driver 384.98), got PepperFlash from Zako ChromeOS image, and DRM works there. Used Adobe's DRM test page. So, I can't reproduce the issue.

Try to remove pluginreg.dat file from Firefox profile directory. That will make Firefox to try plugins once again at the next time you launch the browser. Also try to remove files in ~/.config/freshwrapper-data/ directory. That directory is used for storing Flash-related data. Perhaps, some of the data is preventing PepperFlash from using something. Just a wild guess.