1704072 - browserAction popup redraw issues with WebRender enabled and `gfx.webrender.allow-partial-present-buffer-age` set to true

Status: UNCONFIRMED

(Core :: Graphics: WebRender, defect)

Description

[ruihildt]

Attachment: popup-issue.mp4

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:87.0) Gecko/20100101 Firefox/87.0

Steps to reproduce:

1 - Install several extensions which includes popups (in the video: ublock origin, Privacy Badger, I don't care about cookies, LocalCDN )
2 - click on their icon to show popup

System: Ubuntu 20.04 / Thinkpad T490
gfx.webrender.all is on false

Actual results:

Some popups will only be half displayed, some will show entirely only when closing/reopening popup.

Expected results:

I expected to see the popups to consistently display.

Comment 1

[ruihildt]

Attachment: With `gfx.webrender.allow-partial-present-buffer-age` disabled

For some reason, I switched gfx.webrender.allow-partial-present-buffer-age to false, and I don't have the issue anymore, even though the way the popup is rendered seems different.

Comment 2

[ruihildt]

And to be complete, I am working on a webextension and my popup display the same issue, whereas Ublock Origin renders correctly consistently.

So I asked on the Add-ons Matrix channel if there was a Known-Way™ to have it correctly displayed, and I was suggested to open a bug report.

Comment 3

[Luca Greco [:rpl] [:luca] [:lgreco]]

Hi Andrew,
do you have any ideas about how gfx.webrender.allow-partial-present-buffer-age may be related to this redraw issue on the extension browserAction popup windows?
is it expected that gfx.webrender.allow-partial-present-buffer-age would have any effect while gfx.webrender.enabled is false?

Comment 4

[Luca Greco [:rpl] [:luca] [:lgreco]]

would you mind to open about:support in a new tab from a Firefox profile where you are able to reproduce the issue and use the "copy text to clipboard" button to attach those details to this bug?
(even better if it is a pristine one, without any other unrelated addon or prefs set, just the bare minimum that allow you to reproduce the bug on your system)

The details collected by about:support are often attached to bug reports, because they are often helpful to help us to spot if there is any other correlation worth looking into (e.g. in this case I guess that the gpu may matter for the ability to reproduce the issue consistently, as well as values set on some of the other prefs related to webrender).

Comment 5

[ruihildt]

Attachment: Video of the bug on a new profile with a single extension installed

I created a profile where I only installed "I don't care about cookies" and here's the informations requested:

Application Basics
------------------

Name: Firefox
Version: 87.0
Build ID: 20210318103112
Distribution ID: canonical
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:87.0) Gecko/20100101 Firefox/87.0
OS: Linux 5.8.0-49-generic #55~20.04.1-Ubuntu SMP Fri Mar 26 01:01:07 UTC 2021
Multiprocess Windows: 1/1
Fission Windows: 0/1 Disabled by default
Remote Processes: 4
Enterprise Policies: Inactive
Google Location Service Key: Found
Google Safebrowsing Key: Found
Mozilla Location Service Key: Missing
Safe Mode: false

Crash Reports for the Last 3 Days
---------------------------------

Report ID: bp-b9fb4fff-f372-45cb-80cb-2a61f0210408
Submitted: 1 day ago

Firefox Features
----------------

Name: DoH Roll-Out
Version: 2.0.0
ID: [e-mail]

Name: Firefox Screenshots
Version: 39.0.0
ID: [e-mail]

Name: Form Autofill
Version: 1.0
ID: [e-mail]

Name: Web Compatibility Interventions
Version: 20.1.0
ID: [e-mail]

Name: WebCompat Reporter
Version: 1.4.0
ID: [e-mail]

Remote Features
---------------

bug-1701297-rollout-turn-off-networkjarrecord_failure_reason-release-87-88: active

Remote Processes
----------------

Type: Web Content
Count: 1 / 8

Type: Privileged About
Count: 1

Type: Extension
Count: 1

Type: Preallocated
Count: 1

Add-ons
-------

Name: Amazon.com
Type: extension
Version: 1.3
Enabled: true
ID: [e-mail]

Name: Bing
Type: extension
Version: 1.3
Enabled: true
ID: [e-mail]

Name: DuckDuckGo
Type: extension
Version: 1.1
Enabled: true
ID: [e-mail]

Name: eID Belgium
Type: extension
Version: 1.0.29
Enabled: true
ID: [e-mail]

Name: Google
Type: extension
Version: 1.1
Enabled: true
ID: [e-mail]

Name: I don't care about cookies
Type: extension
Version: 3.2.9
Enabled: true
ID: jid1-KKzOGWgsW3Ao4Q@jetpack

Name: Wikipedia (en)
Type: extension
Version: 1.1
Enabled: true
ID: [e-mail]

Name: English (CA) Language Pack
Type: locale
Version: 87.0buildid20210318103112
Enabled: true
ID: [e-mail]

Name: English (GB) Language Pack
Type: locale
Version: 87.0buildid20210318103112
Enabled: true
ID: [e-mail]

Graphics
--------

Features
Compositing: WebRender
Asynchronous Pan/Zoom: wheel input enabled; scrollbar drag enabled; keyboard enabled; autoscroll enabled; smooth pinch-zoom enabled
WebGL 1 Driver WSI Info: GLX 1.4 GLX_VENDOR(client): Mesa Project and SGI GLX_VENDOR(server): SGI Extensions: 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_framebuffer_sRGB 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_texture_from_pixmap GLX_EXT_visual_info GLX_EXT_visual_rating GLX_INTEL_swap_event GLX_MESA_copy_sub_buffer GLX_MESA_query_renderer GLX_MESA_swap_control GLX_OML_swap_method GLX_OML_sync_control GLX_SGIS_multisample GLX_SGIX_fbconfig GLX_SGIX_pbuffer GLX_SGIX_visual_select_group GLX_SGI_make_current_read GLX_SGI_swap_control GLX_SGI_video_sync IsWebglOutOfProcessEnabled: 0
WebGL 1 Driver Renderer: Intel -- Mesa Intel(R) UHD Graphics 620 (WHL GT2)
WebGL 1 Driver Version: 4.6 (Compatibility Profile) Mesa 20.2.6
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GL_INGR_blend_func_separate GL_NV_blend_square GL_NV_light_max_exponent GL_NV_texgen_reflection GL_NV_texture_env_combine4 GL_S3_s3tc GL_SUN_multi_draw_arrays GL_ARB_texture_border_clamp GL_ARB_texture_compression GL_EXT_framebuffer_object GL_EXT_texture_compression_s3tc GL_EXT_texture_env_combine GL_EXT_texture_env_dot3 GL_MESA_window_pos GL_NV_packed_depth_stencil GL_NV_texture_rectangle GL_ARB_depth_texture GL_ARB_occlusion_query GL_ARB_shadow GL_ARB_texture_env_combine GL_ARB_texture_env_crossbar GL_ARB_texture_env_dot3 GL_ARB_texture_mirrored_repeat GL_ARB_window_pos GL_ATI_fragment_shader GL_EXT_stencil_two_side GL_EXT_texture_cube_map GL_NV_depth_clamp GL_NV_fog_distance GL_APPLE_packed_pixels GL_ARB_draw_buffers GL_ARB_fragment_program GL_ARB_fragment_shader GL_ARB_shader_objects GL_ARB_vertex_program GL_ARB_vertex_shader GL_ATI_draw_buffers GL_ATI_texture_env_combine3 GL_ATI_texture_float GL_EXT_shadow_funcs GL_EXT_stencil_wrap GL_MESA_pack_invert GL_NV_primitive_restart GL_ARB_depth_clamp GL_ARB_fragment_program_shadow GL_ARB_half_float_pixel GL_ARB_occlusion_query2 GL_ARB_point_sprite GL_ARB_shading_language_100 GL_ARB_sync GL_ARB_texture_non_power_of_two GL_ARB_vertex_buffer_object GL_ATI_blend_equation_separate GL_EXT_blend_equation_separate GL_OES_read_format GL_ARB_color_buffer_float GL_ARB_pixel_buffer_object GL_ARB_texture_compression_rgtc GL_ARB_texture_float GL_ARB_texture_rectangle GL_EXT_packed_float GL_EXT_pixel_buffer_object GL_EXT_texture_compression_dxt1 GL_EXT_texture_compression_rgtc GL_EXT_texture_rectangle GL_EXT_texture_sRGB GL_EXT_texture_shared_exponent GL_ARB_framebuffer_object GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXT_packed_depth_stencil GL_ARB_vertex_array_object GL_ATI_separate_stencil GL_EXT_draw_buffers2 GL_EXT_draw_instanced GL_EXT_gpu_program_parameters GL_EXT_gpu_shader4 GL_EXT_texture_array GL_EXT_texture_integer GL_EXT_texture_sRGB_decode GL_EXT_timer_query GL_OES_EGL_image 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GL_ARB_texture_gather GL_ARB_texture_multisample GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_uniform_buffer_object GL_ARB_vertex_type_2_10_10_10_rev GL_EXT_provoking_vertex GL_EXT_texture_snorm GL_MESA_texture_signed_rgba GL_NV_copy_image GL_NV_texture_barrier GL_ARB_draw_indirect GL_ARB_get_program_binary GL_ARB_gpu_shader5 GL_ARB_gpu_shader_fp64 GL_ARB_robustness GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_precision GL_ARB_shader_subroutine GL_ARB_texture_compression_bptc GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_viewport_array GL_EXT_direct_state_access GL_EXT_vertex_attrib_64bit GL_AMD_multi_draw_indirect GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_ARB_base_instance GL_ARB_compressed_texture_pixel_storage GL_ARB_conservative_depth GL_ARB_internalformat_query GL_ARB_map_buffer_alignment GL_ARB_shader_atomic_counters GL_ARB_shader_image_load_store GL_ARB_shading_language_420pack GL_ARB_shading_language_packing GL_ARB_texture_storage GL_ARB_transform_feedback_instanced GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_transform_feedback GL_AMD_query_buffer_object GL_AMD_shader_trinary_minmax GL_AMD_vertex_shader_layer GL_AMD_vertex_shader_viewport_index GL_ARB_ES3_compatibility GL_ARB_arrays_of_arrays GL_ARB_clear_buffer_object GL_ARB_compute_shader GL_ARB_copy_image GL_ARB_explicit_uniform_location GL_ARB_fragment_layer_viewport GL_ARB_framebuffer_no_attachments GL_ARB_invalidate_subdata GL_ARB_multi_draw_indirect GL_ARB_program_interface_query GL_ARB_robust_buffer_access_behavior GL_ARB_shader_image_size GL_ARB_shader_storage_buffer_object GL_ARB_stencil_texturing GL_ARB_texture_buffer_range GL_ARB_texture_query_levels GL_ARB_texture_storage_multisample GL_ARB_texture_view GL_ARB_vertex_attrib_binding GL_KHR_debug GL_KHR_robustness GL_KHR_texture_compression_astc_ldr GL_AMD_pinned_memory GL_ARB_buffer_storage GL_ARB_clear_texture GL_ARB_compute_variable_group_size GL_ARB_enhanced_layouts GL_ARB_indirect_parameters GL_ARB_internalformat_query2 GL_ARB_multi_bind GL_ARB_query_buffer_object GL_ARB_seamless_cubemap_per_texture GL_ARB_shader_draw_parameters GL_ARB_shader_group_vote GL_ARB_shading_language_include GL_ARB_texture_mirror_clamp_to_edge GL_ARB_texture_stencil8 GL_ARB_vertex_type_10f_11f_11f_rev GL_EXT_shader_framebuffer_fetch GL_EXT_shader_integer_mix GL_INTEL_performance_query GL_ARB_ES3_1_compatibility GL_ARB_clip_control GL_ARB_conditional_render_inverted GL_ARB_cull_distance GL_ARB_derivative_control GL_ARB_direct_state_access GL_ARB_get_texture_sub_image GL_ARB_pipeline_statistics_query GL_ARB_shader_texture_image_samples GL_ARB_texture_barrier GL_ARB_transform_feedback_overflow_query GL_EXT_polygon_offset_clamp GL_KHR_blend_equation_advanced GL_KHR_blend_equation_advanced_coherent GL_KHR_context_flush_control GL_KHR_robust_buffer_access_behavior GL_ARB_fragment_shader_interlock GL_ARB_gpu_shader_int64 GL_ARB_parallel_shader_compile GL_ARB_post_depth_coverage GL_ARB_shader_atomic_counter_ops GL_ARB_shader_ballot GL_ARB_shader_clock GL_ARB_shader_viewport_layer_array GL_EXT_shader_samples_identical GL_KHR_no_error GL_KHR_texture_compression_astc_sliced_3d GL_NV_fragment_shader_interlock GL_ARB_gl_spirv GL_ARB_spirv_extensions GL_MESA_shader_integer_functions GL_ARB_polygon_offset_clamp GL_ARB_texture_filter_anisotropic GL_KHR_parallel_shader_compile GL_EXT_EGL_image_storage GL_EXT_shader_framebuffer_fetch_non_coherent GL_EXT_texture_sRGB_R8 GL_EXT_texture_shadow_lod GL_INTEL_blackhole_render GL_INTEL_shader_atomic_float_minmax GL_INTEL_shader_integer_functions2 GL_MESA_framebuffer_flip_y GL_NV_compute_shader_derivatives GL_EXT_EGL_sync GL_EXT_demote_to_helper_invocation
WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_float_blend EXT_frag_depth EXT_shader_texture_lod EXT_sRGB EXT_texture_compression_bptc EXT_texture_compression_rgtc EXT_texture_filter_anisotropic MOZ_debug OES_element_index_uint OES_fbo_render_mipmap OES_standard_derivatives OES_texture_float OES_texture_float_linear OES_texture_half_float OES_texture_half_float_linear OES_vertex_array_object WEBGL_color_buffer_float WEBGL_compressed_texture_astc WEBGL_compressed_texture_etc WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context
WebGL 2 Driver WSI Info: GLX 1.4 GLX_VENDOR(client): Mesa Project and SGI GLX_VENDOR(server): SGI Extensions: 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_framebuffer_sRGB 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_texture_from_pixmap GLX_EXT_visual_info GLX_EXT_visual_rating GLX_INTEL_swap_event GLX_MESA_copy_sub_buffer GLX_MESA_query_renderer GLX_MESA_swap_control GLX_OML_swap_method GLX_OML_sync_control GLX_SGIS_multisample GLX_SGIX_fbconfig GLX_SGIX_pbuffer GLX_SGIX_visual_select_group GLX_SGI_make_current_read GLX_SGI_swap_control GLX_SGI_video_sync IsWebglOutOfProcessEnabled: 0
WebGL 2 Driver Renderer: Intel -- Mesa Intel(R) UHD Graphics 620 (WHL GT2)
WebGL 2 Driver Version: 4.6 (Core Profile) Mesa 20.2.6
WebGL 2 Driver Extensions: GL_3DFX_texture_compression_FXT1 GL_AMD_conservative_depth GL_AMD_depth_clamp_separate GL_AMD_draw_buffers_blend GL_AMD_gpu_shader_int64 GL_AMD_multi_draw_indirect GL_AMD_performance_monitor GL_AMD_pinned_memory GL_AMD_query_buffer_object GL_AMD_seamless_cubemap_per_texture GL_AMD_shader_stencil_export GL_AMD_shader_trinary_minmax GL_AMD_texture_texture4 GL_AMD_vertex_shader_layer GL_AMD_vertex_shader_viewport_index GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 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_blend_func_extended GL_ARB_buffer_storage GL_ARB_clear_buffer_object GL_ARB_clear_texture GL_ARB_clip_control 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_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_shader GL_ARB_fragment_shader_interlock GL_ARB_framebuffer_no_attachments GL_ARB_framebuffer_object GL_ARB_framebuffer_sRGB 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_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_occlusion_query2 GL_ARB_parallel_shader_compile GL_ARB_pipeline_statistics_query GL_ARB_pixel_buffer_object 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_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_stencil_export 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_420pack GL_ARB_shading_language_include 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GL_ARB_vertex_attrib_64bit GL_ARB_vertex_attrib_binding GL_ARB_vertex_buffer_object 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_ATI_blend_equation_separate GL_ATI_texture_float GL_EXT_EGL_image_storage GL_EXT_EGL_sync GL_EXT_abgr GL_EXT_blend_equation_separate GL_EXT_demote_to_helper_invocation GL_EXT_draw_buffers2 GL_EXT_draw_instanced GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_framebuffer_object GL_EXT_framebuffer_sRGB GL_EXT_packed_depth_stencil GL_EXT_packed_float GL_EXT_pixel_buffer_object GL_EXT_polygon_offset_clamp GL_EXT_provoking_vertex GL_EXT_shader_framebuffer_fetch GL_EXT_shader_framebuffer_fetch_non_coherent GL_EXT_shader_integer_mix GL_EXT_shader_samples_identical GL_EXT_texture_array GL_EXT_texture_compression_dxt1 GL_EXT_texture_compression_rgtc GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_integer GL_EXT_texture_sRGB GL_EXT_texture_sRGB_R8 GL_EXT_texture_sRGB_decode GL_EXT_texture_shadow_lod GL_EXT_texture_shared_exponent GL_EXT_texture_snorm GL_EXT_texture_swizzle GL_EXT_timer_query GL_EXT_transform_feedback GL_EXT_vertex_array_bgra GL_EXT_vertex_attrib_64bit GL_IBM_multimode_draw_arrays GL_INTEL_blackhole_render GL_INTEL_conservative_rasterization GL_INTEL_performance_query GL_INTEL_shader_atomic_float_minmax GL_INTEL_shader_integer_functions2 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_KHR_texture_compression_astc_ldr GL_KHR_texture_compression_astc_sliced_3d GL_MESA_framebuffer_flip_y GL_MESA_pack_invert GL_MESA_shader_integer_functions GL_MESA_texture_signed_rgba GL_NV_compute_shader_derivatives GL_NV_conditional_render GL_NV_copy_image GL_NV_depth_clamp GL_NV_fragment_shader_interlock GL_NV_packed_depth_stencil GL_NV_texture_barrier GL_OES_EGL_image GL_S3_s3tc
WebGL 2 Extensions: EXT_color_buffer_float EXT_float_blend EXT_texture_compression_bptc EXT_texture_compression_rgtc EXT_texture_filter_anisotropic MOZ_debug OES_texture_float_linear WEBGL_compressed_texture_astc WEBGL_compressed_texture_etc WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context
Window Protocol: x11
Desktop Environment: gnome
Off Main Thread Painting Enabled: true
Off Main Thread Painting Worker Count: 4
Target Frame Rate: 60
GPU #1
Active: Yes
Description: Mesa Intel(R) UHD Graphics 620 (WHL GT2)
Vendor ID: 0x8086
Device ID: 0x3ea0
Driver Vendor: mesa/iris
Driver Version: 20.2.6.0
RAM: 0

Diagnostics
AzureCanvasBackend: skia
AzureContentBackend: skia
AzureFallbackCanvasBackend: none
CairoUseXRender: 0
CMSOutputProfile: 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
Display0: 7040x1440 default
DisplayCount: 1
Decision Log
HW_COMPOSITING:
available by default
OPENGL_COMPOSITING:
available by default
WEBRENDER:
available by default
WEBRENDER_QUALIFIED:
available by default
WEBRENDER_COMPOSITOR:
disabled by default: Disabled by default
WEBRENDER_PARTIAL:
available by default
WEBRENDER_OPTIMIZED_SHADERS:
available by default
WEBRENDER_ANGLE:
available by default
unavailable by env: OS not supported
WEBRENDER_DCOMP_PRESENT:
available by default
disabled by user: User disabled via pref
unavailable by env: Requires Windows 10 or later
unavailable by runtime: Requires ANGLE
WEBRENDER_SOFTWARE:
available by default
denied by env: Not on allowlist
OMTP:
available by default
WEBGPU:
disabled by default: Disabled by default
blocked by runtime: WebGPU can only be enabled in nightly




Media
-----

Audio Backend: pulse-rust
Max Channels: 2
Preferred Sample Rate: 44100
Roundtrip latency (standard deviation): 168.23ms (38.95)
Output Devices
Name: Group
Built-in Audio Analog Stereo: /devices/pci0000:00/0000:00:1f.3/sound/card0
LE-Bose NC 700 HP:
Input Devices
Name: Group
Monitor of Built-in Audio Analog Stereo: /devices/pci0000:00/0000:00:1f.3/sound/card0
Built-in Audio Analog Stereo: /devices/pci0000:00/0000:00:1f.3/sound/card0
Monitor of LE-Bose NC 700 HP:

Enumerate database

Environment Variables
---------------------

DISPLAY: :0
MOZ_APP_LAUNCHER: /usr/bin/firefox
MOZ_ASSUME_USER_NS: 1
MOZ_CRASHREPORTER_DATA_DIRECTORY: /home/rui/.mozilla/firefox/Crash Reports
MOZ_CRASHREPORTER_EVENTS_DIRECTORY: /home/rui/.mozilla/firefox/sikms8u6.pristine/crashes/events
MOZ_CRASHREPORTER_PING_DIRECTORY: /home/rui/.mozilla/firefox/Pending Pings
MOZ_CRASHREPORTER_RESTART_ARG_0: /usr/bin/firefox
MOZ_CRASHREPORTER_RESTART_ARG_1: -no-remote
MOZ_CRASHREPORTER_RESTART_ARG_2: -P
MOZ_CRASHREPORTER_STRINGS_OVERRIDE: /usr/lib/firefox/browser/crashreporter-override.ini
MOZ_LAUNCHED_CHILD:
XRE_BINARY_PATH:
XRE_PROFILE_LOCAL_PATH:
XRE_PROFILE_PATH:
XRE_RESTARTED_BY_PROFILE_MANAGER:
XRE_START_OFFLINE:
MOZ_CRASHREPORTER_RESTART_ARG_3: pristine
MOZ_CRASHREPORTER_RESTART_ARG_4:
MOZ_NO_REMOTE: 1

Experimental Features
---------------------

about:home startup cache (browser.startup.homepage.abouthome_cache.enabled): false
Cookies: SameSite=Lax by default (network.cookie.sameSite.laxByDefault): false
Cookies: SameSite=None requires secure attribute (network.cookie.sameSite.noneRequiresSecure): false
Cookies: Schemeful SameSite (network.cookie.sameSite.schemeful): false
CSS: Constructable Stylesheets (layout.css.constructable-stylesheets.enabled): false
CSS: Masonry Layout (layout.css.grid-template-masonry-value.enabled): false
Developer Tools: Color Scheme Simulation (devtools.inspector.color-scheme-simulation.enabled): true
Developer Tools: Compatibility Panel (devtools.inspector.compatibility.enabled): false
Developer Tools: Execution Context Selector (devtools.webconsole.input.context): false
Developer Tools: Service Worker debugging (devtools.debugger.features.windowless-service-workers): false
Fission (Site Isolation) (fission.autostart): false
HTTP/3 protocol (network.http.http3.enabled): false
Media: AVIF (image.avif.enabled): false
Multiple Picture-in-Picture Support (media.videocontrols.picture-in-picture.allow-multiple): true
Address Bar: show results during IME composition (browser.urlbar.keepPanelOpenDuringImeComposition): false
Web API: inputmode (dom.forms.inputmode): false
Web API: WebGPU (dom.webgpu.enabled): false
WebRTC Global Mute Toggles (privacy.webrtc.globalMuteToggles): false

Remote Experiments
------------------

Important Modified Preferences
------------------------------

browser.contentblocking.category: standard
browser.search.region: SE
browser.startup.homepage_override.buildID: 20210318103112
browser.startup.homepage_override.mstone: 87.0
browser.urlbar.placeholderName: Google
doh-rollout.balrog-migration-done: true
doh-rollout.doneFirstRun: true
dom.push.userAgentID: a68ad0e5f5f145aa82d8610009f36f2c
extensions.lastAppVersion: 87.0
media.gmp.storage.version.observed: 1
network.trr.blocklist_cleanup_done: true
privacy.sanitize.pending: [{"id":"newtab-container","itemsToClear":[],"options":{}}]
security.sandbox.content.tempDirSuffix: 18f1d944-1195-42fa-9f39-b34a177223a8
security.sandbox.plugin.tempDirSuffix: 3413e648-80f2-406c-8bb8-dd37e7bb48e9

Important Locked Preferences
----------------------------

fission.autostart.session: false

Places Database
---------------

Accessibility
-------------

Activated: false
Prevent Accessibility: 0

Library Versions
----------------

NSPR
Expected minimum version: 4.29
Version in use: 4.29

NSS
Expected minimum version: 3.62
Version in use: 3.62

NSSSMIME
Expected minimum version: 3.62
Version in use: 3.62

NSSSSL
Expected minimum version: 3.62
Version in use: 3.62

NSSUTIL
Expected minimum version: 3.62
Version in use: 3.62

Sandbox
-------

Seccomp-BPF (System Call Filtering): true
Seccomp Thread Synchronization: true
User Namespaces: true
Content Process Sandboxing: true
Media Plugin Sandboxing: true
Content Process Sandbox Level: 4
Effective Content Process Sandbox Level: 4

Rejected System Calls
---------------------

Startup Cache
-------------

Disk Cache Path: /home/rui/.cache/mozilla/firefox/sikms8u6.pristine/startupCache/startupCache.8.little
Ignore Disk Cache: false
Found Disk Cache on Init: false
Wrote to Disk Cache: true

Internationalization & Localization
-----------------------------------

Application Settings
Requested Locales: ["en-US"]
Available Locales: ["en-US","en-CA","en-GB"]
App Locales: ["en-US","en-CA","en-GB"]
Regional Preferences: ["en-US","en-CA","en-GB"]
Default Locale: "en-US"
Operating System
System Locales: ["en-US"]
Regional Preferences: ["sv-SE"]

Remote Debugging (Chromium Protocol)
------------------------------------

Accepting Connections: false
URL:

Printing
--------

Modified print settings
-----------------------

Comment 6

[Luca Greco [:rpl] [:luca] [:lgreco]]

Ah, I see from the about:support into from comment 5 that webrender is actually enabled, and so that explains why flipping gfx.webrender.allow-partial-present-buffer-age does effect the ability of reproducing the bug. I guess that gfx.webrender.all may be currently only forcing webrender even if not enabled by default (e.g. disabled because of some incompatibility with a particular gpu or a certain platform).

I'm linking Bug 1677165 as a see also, it looks like the bugzilla issue that has originally introduced gfx.webrender.allow-partial-present-buffer-age and so it may be the regressing change or be related to the reasons behind the issue.

Comment 7

[Alex Cornestean]

Hello,

I’ve attempted to reproduce the issue on the latest Nightly (89.0a1/20210411210108), Beta (88.0b9/20210408190318) and Release (87.0/20210318103112) under Windows 10 x64 and Ubuntu 16.04 LTS, however I’m not sure I actually reproduced the issue, as the results I’ve obtained seem different from what I’ve seen throughout the bug report and comments.

To be more precise about what I’ve done to reproduce the issue, please see the following:

1. Set gfx.webrender.all to true.
2. Made sure gfx.webrender.allow-partial-present-buffer-age was also set to true
3. Installed several add-ons with pop-ups (uBlock Origin, Privacy Badger, I don't care about cookies).
4. Clicked on the add-on icon in the browser toolbar and quickly moved the cursor to the toolbar icon on the left (as in Comment 5)

Following the above steps, here are the results from both Windows and Ubuntu:

Windows:

• there were no issues with the add-on popups on Windows. They were rendered correctly each time.

Ubuntu:

• (1) when simply clicking on the add-on icon to open the popups, some rendering issues (graphical glitch) can be seen before the popup contents are displayed. These rendering issues are temporary though (only being displayed for a fraction of a second before the content is displayed)
• (2) when performing the actions from the video in Comment 5, the graphical glitch persists. The content of the popup is not displayed until hovering the cursor over the popup. See the screenshot for more details

(1) occurred consistently with both gfx.webrender.all = true and gfx.webrender.allow-partial-present-buffer-age = true OR gfx.webrender.all = true and gfx.webrender.allow-partial-present-buffer-age = false
(2) occurred only with both gfx.webrender.all = true and gfx.webrender.allow-partial-present-buffer-age = true

Please let me know if these issues have the same cause as the original reported one and I will then proceed with finding a regression range.

Comment 8

[Alex Cornestean]

Attachment: Untitled.png

Comment 9

[Tomislav Jovanovic :zombie]

Probably someone who understand what's happening with WR can tell what's going on here.