Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Support and discussions for the x86/x64 Linux version of Pale Moon and specific Linux distribution questions related to the browser.

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BenFenner
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Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by BenFenner » 2021-03-01, 16:38

I believe this is new for 29.x but can't be sure.
Typically after less than 30 minutes of browsing, and fewer than ~12 total tabs I will get into a situation where Pale Moon consumes 100% of any one of the PCU cores at any given time. It is doing right now as I type this. The application still performs decently well, but my CPU fans don't love it. ;)
(I don't seem to have this problem on the 4 other Windows 7 machines I run, so I'm reporting this in the Linux section.)

I will then open a new tab to about:blank and close all of the other tabs, one-by-one, slowly trying to see which one is to blame. The CPU usage never drops, even once I've closed all of the original tabs (but leaving the single blank tab open) and left things for a few hours.
Once I close the application, after ~30 seconds the Pale Moon process relinquishes the CPU and memory, closing seemingly properly.

Starting the browser again will have me in this situation again withing 30-60 minutes. More intensive web sites like Facebook cause this to happen sooner, but are not required.
I'm sorry I don't have better steps to reproduce the problem. If I can narrow it down, I will.

I have Pale Moon remember which tabs I have open upon closing, and it restores them when I re-launch the browser. That is a new change for me, and shouldn't have anything to do with this problem. I actually turned on this setting because of this problem. It is saving me time, now that I am restarting PM so often.

I know I've left some details out, so please let me know what else I can provide. I will be happy to oblige.

Operating system: Linux Mint 20.1 (64-bit)
Browser version: Pale Moon 29.0.1 (64-bit)
Problem URL: Various, nothing specific.
Theme: Default
Installed extensions: Also listed in hidden below. (GitHub Web Components Polyfill | uBlock Origin)
Installed plugins: (about:plugins): "No installed plugins found"


Help→Troubleshooting information:
Application Basics
------------------

Name: Pale Moon
Version: 29.0.1 (64-bit)
Build ID: 20210209000654
User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Goanna/4.8 Firefox/68.0 PaleMoon/29.0.1
OS: Linux 5.4.0-66-generic
Safe Mode: false

Extensions
----------

Name: GitHub Web Components Polyfill
Version: 1.1.7
Enabled: true
ID: github-wc-polyfill@Off.JustOff

Name: uBlock Origin
Version: 1.16.4.28
Enabled: true
ID: uBlock0@raymondhill.net

Graphics
--------

Features
Compositing: Basic
GPU Accelerated Windows: 0/1 Basic (OMTC)
Asynchronous Pan/Zoom: none
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
WebGL 1 Driver Renderer: X.Org -- Radeon RX 580 Series (POLARIS10, DRM 3.35.0, 5.4.0-66-generic, LLVM 11.0.0)
WebGL 1 Driver Version: 4.6 (Compatibility Profile) Mesa 20.2.6
WebGL 1 Driver Extensions: GL_ARB_multisample GL_EXT_abgr GL_EXT_bgra GL_EXT_blend_color GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_copy_texture GL_EXT_subtexture GL_EXT_texture_object GL_EXT_vertex_array GL_EXT_compiled_vertex_array GL_EXT_texture GL_EXT_texture3D GL_IBM_rasterpos_clip GL_ARB_point_parameters GL_EXT_draw_range_elements GL_EXT_packed_pixels GL_EXT_point_parameters GL_EXT_rescale_normal GL_EXT_separate_specular_color GL_EXT_texture_edge_clamp GL_SGIS_generate_mipmap GL_SGIS_texture_border_clamp GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod GL_ARB_framebuffer_sRGB GL_ARB_multitexture GL_EXT_framebuffer_sRGB GL_IBM_multimode_draw_arrays GL_IBM_texture_mirrored_repeat GL_ARB_texture_cube_map GL_ARB_texture_env_add GL_ARB_transpose_matrix GL_EXT_blend_func_separate GL_EXT_fog_coord GL_EXT_multi_draw_arrays GL_EXT_secondary_color GL_EXT_texture_env_add GL_EXT_texture_filter_anisotropic GL_EXT_texture_lod_bias GL_INGR_blend_func_separate GL_NV_blend_square 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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_bindless_texture 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_integer_mix GL_NVX_gpu_memory_info 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_sparse_buffer GL_ARB_texture_barrier GL_ARB_transform_feedback_overflow_query GL_EXT_polygon_offset_clamp GL_EXT_shader_image_load_formatted GL_KHR_blend_equation_advanced GL_KHR_context_flush_control GL_KHR_robust_buffer_access_behavior GL_ARB_gpu_shader_int64 GL_ARB_parallel_shader_compile 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_ARB_gl_spirv GL_ARB_spirv_extensions GL_EXT_window_rectangles GL_MESA_shader_integer_functions GL_ARB_polygon_offset_clamp GL_ARB_texture_filter_anisotropic GL_EXT_memory_object GL_EXT_memory_object_fd GL_EXT_semaphore GL_EXT_semaphore_fd GL_KHR_parallel_shader_compile GL_NV_alpha_to_coverage_dither_control GL_AMD_framebuffer_multisample_advanced GL_EXT_EGL_image_storage GL_EXT_texture_sRGB_R8 GL_EXT_texture_shadow_lod GL_MESA_framebuffer_flip_y GL_EXT_EGL_sync
WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_frag_depth EXT_sRGB EXT_shader_texture_lod EXT_texture_filter_anisotropic EXT_disjoint_timer_query MOZ_debug_get OES_element_index_uint 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_etc WEBGL_compressed_texture_s3tc WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context MOZ_WEBGL_lose_context MOZ_WEBGL_compressed_texture_s3tc MOZ_WEBGL_depth_texture
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
WebGL 2 Driver Renderer: X.Org -- Radeon RX 580 Series (POLARIS10, DRM 3.35.0, 5.4.0-66-generic, LLVM 11.0.0)
WebGL 2 Driver Version: 4.6 (Core Profile) Mesa 20.2.6
WebGL 2 Driver Extensions: GL_AMD_conservative_depth GL_AMD_depth_clamp_separate GL_AMD_draw_buffers_blend GL_AMD_framebuffer_multisample_advanced 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_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_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_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_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 GL_ARB_shading_language_packing GL_ARB_sparse_buffer GL_ARB_spirv_extensions GL_ARB_stencil_texturing GL_ARB_sync GL_ARB_tessellation_shader GL_ARB_texture_barrier GL_ARB_texture_buffer_object GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_buffer_range GL_ARB_texture_compression_bptc GL_ARB_texture_compression_rgtc GL_ARB_texture_cube_map_array GL_ARB_texture_filter_anisotropic GL_ARB_texture_float GL_ARB_texture_gather GL_ARB_texture_mirror_clamp_to_edge 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_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_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_meminfo GL_ATI_texture_float GL_ATI_texture_mirror_once GL_EXT_EGL_image_storage GL_EXT_EGL_sync GL_EXT_abgr GL_EXT_blend_equation_separate GL_EXT_depth_bounds_test 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_memory_object GL_EXT_memory_object_fd 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_semaphore GL_EXT_semaphore_fd GL_EXT_shader_image_load_formatted GL_EXT_shader_image_load_store 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_mirror_clamp 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_EXT_window_rectangles GL_IBM_multimode_draw_arrays GL_KHR_blend_equation_advanced 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_NVX_gpu_memory_info GL_NV_alpha_to_coverage_dither_control GL_NV_conditional_render GL_NV_copy_image GL_NV_depth_clamp GL_NV_packed_depth_stencil GL_NV_texture_barrier GL_NV_vdpau_interop GL_OES_EGL_image GL_S3_s3tc
WebGL 2 Extensions: EXT_color_buffer_float EXT_texture_filter_anisotropic EXT_disjoint_timer_query MOZ_debug_get OES_texture_float_linear WEBGL_compressed_texture_etc WEBGL_compressed_texture_s3tc WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context MOZ_WEBGL_lose_context MOZ_WEBGL_compressed_texture_s3tc
Hardware H264 Decoding: No
Audio Backend: pulse
GPU #1
Active: Yes
Description: X.Org -- Radeon RX 580 Series (POLARIS10, DRM 3.35.0, 5.4.0-66-generic, LLVM 11.0.0)
Vendor ID: X.Org
Device ID: Radeon RX 580 Series (POLARIS10, DRM 3.35.0, 5.4.0-66-generic, LLVM 11.0.0)
Driver Version: 4.6 (Compatibility Profile) Mesa 20.2.6

Diagnostics
AzureCanvasAccelerated: 0
AzureCanvasBackend: skia
AzureContentBackend: cairo
AzureFallbackCanvasBackend: cairo
CairoUseXRender: 1
Decision Log
HW_COMPOSITING:
disabled by user: Disabled by pref
OPENGL_COMPOSITING:
unavailable by default: Hardware compositing is disabled




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print.print_margin_bottom: 0.5
print.print_margin_left: 0.5
print.print_margin_right: 0.5
print.print_margin_top: 0.5
print.print_oddpages: true
print.print_orientation: 1
print.print_page_delay: 50
print.print_paper_data: 0
print.print_paper_height: 11.00
print.print_paper_name: na_letter
print.print_paper_size_unit: 0
print.print_paper_width: 8.50
print.print_scaling: 1.00
print.print_shrink_to_fit: true
print.print_to_file: false
print.print_unwriteable_margin_bottom: 56
print.print_unwriteable_margin_left: 25
print.print_unwriteable_margin_right: 25
print.print_unwriteable_margin_top: 25
privacy.cpd.connectivityData: true
privacy.cpd.offlineApps: true
privacy.cpd.siteSettings: true
privacy.donottrackheader.enabled: true
privacy.sanitize.migrateFx3Prefs: true
services.sync.declinedEngines:
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1614393405

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

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

JavaScript
----------

Incremental GC: true

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

Activated: false
Prevent Accessibility: 1

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

NSPR
Expected minimum version: 4.29
Version in use: 4.29

NSS
Expected minimum version: 3.59.1.1
Version in use: 3.59.1.1

NSSSMIME
Expected minimum version: 3.59.1.1
Version in use: 3.59.1.1

NSSSSL
Expected minimum version: 3.59.1.1
Version in use: 3.59.1.1

NSSUTIL
Expected minimum version: 3.59.1.1
Version in use: 3.59.1.1

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by BenFenner » 2021-03-01, 16:49

Oh, and one more thing of note.

When I restart the browser, I'm told Pale Moon is not my default browser, and would I like to make it so? I choose "yes" to make it my default browser and make sure the checkbox is checked to always perform this check when starting Pale Moon.
However, it often asks me this question now after restarting the browser.
I've never seen this issue before on any of my 5 machines...

(If it matters, this is often (always?) after clicking a link in a Thunderbird e-mail to initiate launching of Pale Moon.)

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by BenFenner » 2021-03-01, 17:02

I'm also going to try to keep better track of if this is happening because of OS updates or not.
It might be that this only happens after applying OS updates, but before restarting the computer.
(Sometimes the OS updates require a restart, sometimes not. Either way, I often avoid a restart for possibly a few days, as I'm busy doing actual work and it takes a long time to get back to where I was after a restart.)

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by vannilla » 2021-03-01, 19:31

Something popping up already is this: "GPU Accelerated Windows: 0/1 Basic (OMTC)".
As you can see by that 0/1, the rendering on the screen is performed entirely by the CPU, which explains the 100% usage, since both the UI and actual web content are pretty heavy targets.
You migth want to scan the browser's preferences window looking for hardware acceleration-related settings.
If it still doesn't work, check your drivers.

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by New Tobin Paradigm » 2021-03-01, 19:40

HW Accel on linux is still spotty at best. You CAN force it on but generally saying "look for prefs" isn't recommended when this is a long standing well documented specific thing.

If you do force enable it and you start seeing graphical glitches then it is a true HW incompatibility otherwise just treat it as a soft mostly not a problem maybe incompatibility that can largely be ignored by leaving it forced on.
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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by vannilla » 2021-03-01, 20:25

Well, the standard preferences UI has a setting to use accelaration when available, before forcing its use.
I haven't scanned the full list of informations, but maybe he accidentally unticked that checkbox or something like that.

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by BenFenner » 2021-03-01, 20:46

Thank you for the responses vannilla and Tobin.
Before getting into the heart of the recent discussion, I will say that yes, I have forced HW acceleration on. I'd forgotten about that. I did this after YouTube playback pegged the CPU, as did window resizing.
The setting changed caused no visual glitches, and did allow YouTube videos to play without any real spike in CPU usage. At the time, I was happy with the change and noticed no ill effects.
I understand that it may have caused the issue in this thread. Let me read your posts again above and come up with a more detailed response.
Last edited by BenFenner on 2021-03-01, 20:50, edited 3 times in total.

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by BenFenner » 2021-03-01, 20:48

vannilla wrote:
2021-03-01, 19:31
Something popping up already is this: "GPU Accelerated Windows: 0/1 Basic (OMTC)".
As you can see by that 0/1, the rendering on the screen is performed entirely by the CPU
That is odd to hear, as I was under the impression I'd enabled HW (GPU) acceleration with some about:config changes a few weeks back...
AT the time I knew it wasn't well supported on Linux, but I went ahead with it anyway as a calculated risk. :shifty:

Maybe that setting has been reverted somehow? I thought I had it enabled...
I will try to re-enable, or at least check to see if my settings were reverted.

Edit: Regardless of HW accel, you wouldn't think a single tab with nothing displayed would cause such a CPU spike to hold forever.

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by BenFenner » 2021-03-01, 21:01

This is the strangest thing. I don't know how HW accel got turned off, but I do believe I had it on few weeks back when I noticed high CPU usage with YouTube. I didn't use the preference menu though, as I'm not sure that option existed at the time? Or I missed it? But I ended up changing a few setting in about:config that I found elsewhere in my searching.

I've now turned on HW acceleration, but haven't chosen the option to force it when not available.

I'll rock like this for a bit and see how things go. So far, it's looking promising. :thumbup:

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by vannilla » 2021-03-01, 21:34

Please also remember what Tobin said about support on Linux and that some sites are unfortunately very heavy and will cause spikes in CPU usage, even if temporarily.

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by The Squash » 2021-03-01, 23:49

vannilla wrote:
2021-03-01, 20:25
[...] the standard preferences UI has a setting to use [graphics hardware acceleration] when available, before forcing its use.
That's not quite what I remember from my reading of Mozilla and UXP code -- that's true on Windows, sure. But on Linux, all graphics drivers are considered buggy enough that even checking "Use hardware acceleration when available" isn't enough; all graphics drivers are considered buggy. On Linux, to get graphics acceleration (beyond mere XRender-based acceleration, which thanks to the design of the X protocol is pretty lousy quite frankly), you must force-enable graphics acceleration using the second preference.

That said, that's my experience. Am I wrong, Moonchild?

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by New Tobin Paradigm » 2021-03-02, 05:49

Go away, The Squash. You are not wanted here or anywhere.
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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by Pentium4User » 2021-03-02, 06:14

New Tobin Paradigm wrote:
2021-03-02, 05:49
Go away, The Squash. You are not wanted here or anywhere.
Why don't you answer the question instead of telling people that they are not wanted?
Powerline adapters (dLAN) hardly interfere shortwave radio, so stop using them.

Yes, I still use a 64 bit capable Pentium 4 670 processor with Pale Moon.

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by New Tobin Paradigm » 2021-03-02, 07:18

I did contribute to the thread or was your ancient CPU not able to process my earlier post? The Squash just spouts shit without knowing what he is talking about so I told him to go away.

Besides, I can do both.
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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by Al6bus » 2021-03-02, 07:47

@BenFenner
Off-topic:
Why are you using linux, not windows? :coffee:
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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by Night Wing » 2021-03-02, 13:10

Al6bus wrote:
2021-03-02, 07:47
@BenFenner
Off-topic:
Why are you using linux, not windows? :coffee:
Off-topic:
Just curious.

Since Ben stated in his first post he is using Linux Mint and this is a linux forum, why are you asking him about your comment above?
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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by BenFenner » 2021-03-02, 15:15

Al6bus wrote:
2021-03-02, 07:47
@BenFenner
Off-topic:
Why are you using linux, not windows? :coffee:
Off-topic:
I am using both. Did you miss that in my original post? I have 4 PCs in regular rotation running Windows 7, and 1 PC in regular rotation running Linux Mint. I also have a couple other PCs with Windows XP that rarely see the light of day but come out when I need to tune an old automotive stand-alone ECU via serial port, or similar.

I am using Linux on this one machine because I'm a web developer by trade, and I work mainly in Ruby on Rails. I've tried to do web development with git and Ruby on Rails before on Windows 7 in a production environment. Oh how I wished I could have gotten it to work. I lasted a few months even with cygwin and a few other workarounds, but eventually ran into insurmountable roadblocks. I had MacOS and Linux as my only options, and I think I'd change careers before using MacOS, so here I am on Linux for less than 20% of my PCs. Linux pays the bills, and quite well. Such is life.

(I do manage to work my pet PHP project quite well in Windows. I would like to think I could do PHP on Windows in a professional environment, but I may never find out. I've always had to run Linux for work.)

And while I'm on the topic, I am loving my new job, and left my previous one (with no new job lined up) in large part because I was told by our completely incompetent IT department that I could no longer develop web sites using Pale Moon. So instead of giving it up, I left and eventually (16 months later) found a new shop. So far it's been nothing short of life changing in every good way a new job can be. :thumbup:

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by BenFenner » 2021-03-02, 15:27

It's been a while since I've seen this issue pop up. If I make it through today without it arising, I'll mark this as solved. :thumbup:

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by ZFR77 » 2021-03-02, 16:09

BenFenner wrote:
2021-03-01, 16:49
Oh, and one more thing of note.

When I restart the browser, I'm told Pale Moon is not my default browser, and would I like to make it so? I choose "yes" to make it my default browser and make sure the checkbox is checked to always perform this check when starting Pale Moon.
However, it often asks me this question now after restarting the browser.
I've never seen this issue before on any of my 5 machines...

(If it matters, this is often (always?) after clicking a link in a Thunderbird e-mail to initiate launching of Pale Moon.)
Just wanted to add that this "do you want to make default?" issue is not related to the main issue you've been experiencing. I've been having it too, and it happens when you open Pale Moon from Thunderbird.
viewtopic.php?f=37&t=25200&p=199331

The workaround is to actually choose "No" when you open PM from Thunderbird. If you choose yes, the default browser will be set to Thunderbird, so next time you open PM it will think it's not default.

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Re: Pale Moon (Linux) consuming 100% of CPU core, won't relinquish unless app closed.

Post by BenFenner » 2021-03-02, 19:09

Off-topic:
Oh wow, great info and good detective work ZFR77.
Thanks for posting. I'm sure I'll be able to avoid the prompt with your tip. :D

Edit: I can't post in that thread since it is locked (too old?). Is there a bug report link for this somewhere? I'd love to take a look.
Also, the only way to avoid this is to stop PM from checking if it is the default browser. I can't just click "No" at the prompt and have the prompt no longer appear. I have to disable the default broswer check. That is not ideal.

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