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#1 2026-04-01 08:54:50
- physkets
- Member
- From: India
- Registered: 2016-08-22
- Posts: 44
[SOLVED] Laggy response with high CPU usage by gnome-shell
My desktop setup is as follows:
## Hardware Information:
- **Memory:** 32.0 GiB
- **Processor:** Intel® Core™ Ultra 5 245 × 14
- **Graphics:** Intel® Graphics (ARL)
## Software Information:
- **GNOME Version:** 49
- **Windowing System:** Wayland
- **Kernel Version:** Linux 6.19.10-arch1-1
I have my machine running 24x7, and I update once a week when I restart.
I typically use Firefox, Signal, gnome-terminal, Gnome's Papers (document reader), Gnome's Files, etc.
The system often starts to get very slow to respond to inputs after a couple of days, and this seems to be associated with heavy CPU usage by the gnome-shell process.
Is anyone else having similar issues?
Is there someway I can diagnose what is causing it?
Last edited by physkets (2026-04-13 10:14:18)
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#2 2026-04-01 14:50:19
- physkets
- Member
- From: India
- Registered: 2016-08-22
- Posts: 44
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
An additional bit of info: the monitor has a resolution of 2K and is set to a refresh rate of 99.9Hz. I've switched back to 59.9Hz. Maybe that will help.
Last edited by physkets (2026-04-01 14:51:04)
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#3 2026-04-01 15:26:57
- seth
- Member
- From: Won't reply 2 private help req
- Registered: 2012-09-03
- Posts: 74,797
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
Does
intel_gpu_topsuggest load on the IGP?
glxinfo -B
vulkaninfo --summaryOffline
#4 2026-04-03 04:27:45
- physkets
- Member
- From: India
- Registered: 2016-08-22
- Posts: 44
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
The "Render 3D" bar goes to 5% or 10% when I press the Super key to view all windows.
And this animation is again very laggy. I've had much smoother effects on older, weaker hardware, so this is a bit confusing.
$ vulkaninfo --summary
==========
VULKANINFO
==========
Vulkan Instance Version: 1.4.341
Instance Extensions: count = 26
-------------------------------
VK_EXT_acquire_drm_display : extension revision 1
VK_EXT_acquire_xlib_display : extension revision 1
VK_EXT_debug_report : extension revision 10
VK_EXT_debug_utils : extension revision 2
VK_EXT_direct_mode_display : extension revision 1
VK_EXT_display_surface_counter : extension revision 1
VK_EXT_headless_surface : extension revision 1
VK_EXT_layer_settings : extension revision 2
VK_EXT_surface_maintenance1 : extension revision 1
VK_EXT_swapchain_colorspace : extension revision 5
VK_KHR_device_group_creation : extension revision 1
VK_KHR_display : extension revision 23
VK_KHR_external_fence_capabilities : extension revision 1
VK_KHR_external_memory_capabilities : extension revision 1
VK_KHR_external_semaphore_capabilities : extension revision 1
VK_KHR_get_display_properties2 : extension revision 1
VK_KHR_get_physical_device_properties2 : extension revision 2
VK_KHR_get_surface_capabilities2 : extension revision 1
VK_KHR_portability_enumeration : extension revision 1
VK_KHR_surface : extension revision 25
VK_KHR_surface_maintenance1 : extension revision 1
VK_KHR_surface_protected_capabilities : extension revision 1
VK_KHR_wayland_surface : extension revision 6
VK_KHR_xcb_surface : extension revision 6
VK_KHR_xlib_surface : extension revision 6
VK_LUNARG_direct_driver_loading : extension revision 1
Instance Layers: count = 2
--------------------------
VK_LAYER_MESA_anti_lag Open-source implementation of the VK_AMD_anti_lag extension. 1.4.303 version 1
VK_LAYER_MESA_device_select Linux device selection layer 1.4.303 version 1
Devices:
========
GPU0:
apiVersion = 1.4.335
driverVersion = 26.0.3
vendorID = 0x8086
deviceID = 0x7d67
deviceType = PHYSICAL_DEVICE_TYPE_INTEGRATED_GPU
deviceName = Intel(R) Graphics (ARL)
driverID = DRIVER_ID_INTEL_OPEN_SOURCE_MESA
driverName = Intel open-source Mesa driver
driverInfo = Mesa 26.0.3-arch1.1
conformanceVersion = 1.4.0.0
deviceUUID = 8680677d-0600-0000-0002-000000000000
driverUUID = 94ee006e-dfd7-9a4e-fc7b-8d03449880d9I don't have X installed, so `glxinfo` doesn't seem to exist.
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#5 2026-04-03 07:26:04
- seth
- Member
- From: Won't reply 2 private help req
- Registered: 2012-09-03
- Posts: 74,797
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
◉ pacman -F glxinfo
extra/mesa-utilsOffline
#6 2026-04-03 09:19:13
- physkets
- Member
- From: India
- Registered: 2016-08-22
- Posts: 44
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
Ah.. ? Thanks!
$ glxinfo -B
name of display: :0
display: :0 screen: 0
direct rendering: Yes
Extended renderer info (GLX_MESA_query_renderer):
Vendor: Intel (0x8086)
Device: Mesa Intel(R) Graphics (ARL) (0x7d67)
Version: 26.0.3
Accelerated: yes
Video memory: 31601MB
Unified memory: yes
Preferred profile: core (0x1)
Max core profile version: 4.6
Max compat profile version: 4.6
Max GLES1 profile version: 1.1
Max GLES[23] profile version: 3.2
OpenGL vendor string: Intel
OpenGL renderer string: Mesa Intel(R) Graphics (ARL)
OpenGL core profile version string: 4.6 (Core Profile) Mesa 26.0.3-arch1.1
OpenGL core profile shading language version string: 4.60
OpenGL core profile context flags: (none)
OpenGL core profile profile mask: core profile
OpenGL version string: 4.6 (Compatibility Profile) Mesa 26.0.3-arch1.1
OpenGL shading language version string: 4.60
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile
OpenGL ES profile version string: OpenGL ES 3.2 Mesa 26.0.3-arch1.1
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20Last edited by physkets (2026-04-06 05:01:49)
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#7 2026-04-03 12:53:30
- seth
- Member
- From: Won't reply 2 private help req
- Registered: 2012-09-03
- Posts: 74,797
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
Please remove the oversized screenshot and post the about:support data (FF allows you export it as json or you could save the html)
The glxinfo doesn't look like software rendering at all 
it gets especially laggy when I open Firefox
https://wiki.archlinux.org/title/Firefox#Xwayland
https://wiki.archlinux.org/title/Waylan … plications
Does running on xwayland ./. native wayland have any impact on that?
Do you btw. have similar issues w/ any X11 or other wayland compositors (even more fancy ones like hyprland)?
What if you add
intel_idle.max_cstate=1 i915.enable_dc=0 ahci.mobile_lpm_policy=1 i915.enable_psr=0to the https://wiki.archlinux.org/title/Kernel_parameters resp. do you use i915 or xe (and does /that/ matter) and also, do you have https://archlinux.org/packages/?name=vulkan-intel installed?
That being said
The system often starts to get very slow to respond to inputs after a couple of days, and this seems to be associated with heavy CPU usage by the gnome-shell process.
This could just be a straight gnome gnome bug, running into some live-lock/event recursion
Does restarting the session immediately alleviate the situation? And is the gnome-shell process owned by your user (your gnome session) or the gdm user (ie. actually GDM is going wild)?
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#8 2026-04-06 05:14:01
- physkets
- Member
- From: India
- Registered: 2016-08-22
- Posts: 44
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
I've removed the screenshot from me previous post.
Here is a json of the whole `about support`:
{
"application": {
"name": "Firefox",
"osVersion": "Linux 6.19.11-arch1-1 #1 SMP PREEMPT_DYNAMIC Thu, 02 Apr 2026 23:33:01 +0000",
"version": "149.0",
"buildID": "20260323182030",
"distributionID": "archlinux",
"userAgent": "Mozilla/5.0 (X11; Linux x86_64; rv:149.0) Gecko/20100101 Firefox/149.0",
"safeMode": false,
"memorySizeBytes": 33136312320,
"diskAvailableBytes": 331217190912,
"supportURL": "https://support.mozilla.org/1/firefox/149.0/Linux/en-US/",
"osTheme": "Adwaita / Adwaita",
"pointingDevices": [],
"numTotalWindows": 2,
"numFissionWindows": 2,
"numRemoteWindows": 2,
"fissionAutoStart": true,
"fissionDecisionStatus": "enabledByDefault",
"remoteAutoStart": true,
"policiesStatus": 0,
"keyLocationServiceGoogleFound": true,
"keySafebrowsingGoogleFound": true,
"keyMozillaFound": false
},
"securitySoftware": {
"registeredAntiVirus": "",
"registeredAntiSpyware": "",
"registeredFirewall": ""
},
"environmentVariables": {
"DISPLAY": ":0",
"MOZ_ASSUME_USER_NS": "1",
"MOZ_CRASHREPORTER_EVENTS_DIRECTORY": "/home/physkets/.config/mozilla/firefox/ew8qd2f6.default-release/crashes/events",
"MOZ_CRASHREPORTER_RESTART_ARG_1": "",
"MOZ_CRASHREPORTER_DATA_DIRECTORY": "/home/physkets/.config/mozilla/firefox/Crash Reports",
"MOZ_CRASHREPORTER_PING_DIRECTORY": "/home/physkets/.config/mozilla/firefox/Pending Pings",
"MOZ_LAUNCHED_CHILD": "",
"MOZ_APP_SILENT_START": "",
"XRE_PROFILE_PATH": "",
"XRE_PROFILE_LOCAL_PATH": "",
"XRE_START_OFFLINE": "",
"XRE_BINARY_PATH": "",
"XRE_RESTARTED_BY_PROFILE_MANAGER": ""
},
"modifiedPreferences": {
"accessibility.typeaheadfind.flashBar": 0,
"browser.contentblocking.category": "strict",
"browser.display.document_color_use": 0,
"browser.search.region": "JP",
"browser.search.suggest.enabled": false,
"browser.sessionstore.upgradeBackup.latestBuildID": "20260323182030",
"browser.startup.homepage_override.mstone": "149.0",
"browser.startup.homepage_override.buildID": "20260323182030",
"browser.startup.page": 3,
"browser.tabs.firefox-view.importHistory.dismissed": true,
"browser.tabs.groups.smart.userEnabled": false,
"browser.tabs.splitview.hasUsed": true,
"browser.theme.toolbar-theme": 0,
"browser.toolbars.bookmarks.showOtherBookmarks": false,
"browser.toolbars.bookmarks.visibility": "never",
"browser.urlbar.quicksuggest.migrationVersion": 7,
"browser.urlbar.suggest.searches": false,
"browser.urlbar.showSearchSuggestionsFirst": false,
"browser.urlbar.placeholderName": "DuckDuckGo",
"browser.urlbar.recentsearches.lastDefaultChanged": "1769407581594",
"browser.urlbar.lastUrlbarSearchSeconds": 1775451787,
"browser.urlbar.placeholderName.private": "DuckDuckGo",
"browser.urlbar.quickactions.timesShownOnboardingLabel": 3,
"doh-rollout.home-region": "JP",
"doh-rollout.disable-heuristics": true,
"doh-rollout.doneFirstRun": true,
"dom.forms.autocomplete.formautofill": true,
"dom.security.https_only_mode": true,
"dom.security.https_only_mode_ever_enabled": true,
"extensions.lastAppVersion": "149.0",
"idle.lastDailyNotification": 1775446588,
"media.gmp-gmpopenh264.lastUpdate": 1769145458,
"media.gmp-manager.lastEmptyCheck": 1775445293,
"media.gmp-gmpopenh264.version": "2.6.0",
"media.gmp-manager.lastCheck": 1775445293,
"media.gmp-widevinecdm.version": "4.10.2934.0",
"media.gmp-gmpopenh264.abi": "x86_64-gcc3",
"media.gmp-gmpopenh264.hashValue": "f5246bf14d038adf4ce0c4360262ab722bc3de4220f047c3d542b4c564074b4877dc8659e3125c5171c749e7ce93f20cc63777eb5e1539e960670cbc5f30ac85",
"media.gmp-manager.buildID": "20260323182030",
"media.gmp-widevinecdm.hashValue": "421214210a09a9f9ed8ce482ef857f1c2b29ce1739240d1ec99a61caa3d80db3393752275722bdf5f503489f12a753215fe8a0c82de3aca23780d4ffe5792eb1",
"media.gmp-widevinecdm.abi": "x86_64-gcc3",
"media.eme.enabled": true,
"media.gmp-gmpopenh264.lastDownload": 1769145458,
"media.gmp-gmpopenh264.lastInstallStart": 1769145457,
"media.gmp-widevinecdm.lastDownload": 1769155619,
"media.gmp-widevinecdm.lastInstallStart": 1769155617,
"media.gmp-widevinecdm.lastUpdate": 1769155619,
"media.gmp.storage.version.observed": 1,
"media.videocontrols.picture-in-picture.video-toggle.first-seen-secs": 1769414582,
"media.videocontrols.picture-in-picture.video-toggle.has-used": true,
"network.cookie.CHIPS.lastMigrateDatabase": 2,
"network.dns.disablePrefetch": true,
"network.http.referer.disallowCrossSiteRelaxingDefault.top_navigation": true,
"network.http.speculative-parallel-limit": 0,
"network.lna.blocking": true,
"network.prefetch-next": false,
"network.trr.excluded-domains": ", featuredetect.passkeys.dev",
"network.trr.mode": 3,
"network.trr.uri": "https://mozilla.cloudflare-dns.com/dns-query",
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"privacy.purge_trackers.last_purge": "1775446588237",
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"privacy.annotate_channels.strict_list.enabled": true,
"privacy.bounceTrackingProtection.hasMigratedUserActivationData": true,
"privacy.bounceTrackingProtection.mode": 1,
"privacy.clearOnShutdown_v2.formdata": true,
"privacy.clearSiteData.cookiesAndStorage": false,
"privacy.fingerprintingProtection": true,
"privacy.globalprivacycontrol.enabled": true,
"privacy.globalprivacycontrol.was_ever_enabled": true,
"privacy.query_stripping.enabled": true,
"privacy.query_stripping.enabled.pbmode": true,
"privacy.sanitize.clearOnShutdown.hasMigratedToNewPrefs3": true,
"privacy.trackingprotection.allow_list.convenience.enabled": false,
"privacy.trackingprotection.allow_list.hasMigratedCategoryPrefs": true,
"privacy.trackingprotection.allow_list.hasUserInteractedWithETPSettings": true,
"privacy.trackingprotection.consentmanager.skip.pbmode.enabled": false,
"privacy.trackingprotection.emailtracking.enabled": true,
"privacy.trackingprotection.enabled": true,
"privacy.trackingprotection.socialtracking.enabled": true,
"services.sync.declinedEngines": "prefs,addons",
"services.sync.lastPing": 1775444660,
"services.sync.lastSync": "Mon Apr 06 2026 13:55:57 GMT+0900 (Japan Standard Time)",
"services.sync.engine.prefs": false,
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"signon.firefoxRelay.showToAllBrowsers": true,
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"signon.rememberSignons": false,
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"storage.vacuum.last.content-prefs.sqlite": 1774841749,
"storage.vacuum.last.index": 2,
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},
"lockedPreferences": {
"fission.autostart.session": true,
"media.utility-process.enabled": true
},
"printingPreferences": {
"print_printer": "Mozilla Save to PDF"
},
"media": {
"currentAudioBackend": "pulse-rust",
"currentMaxAudioChannels": 2,
"currentPreferredSampleRate": 44100,
"codecSupportInfo": "H264 SWDEC HWDEC HWENC\nVP9 SWDEC HWDEC HWENC\nVP8 SWDEC HWDEC\nAV1 SWDEC HWDEC HWENC\nHEVC SWDEC HWDEC HWENC\nAAC SWDEC\nMP3 SWDEC\nOpus SWDEC\nVorbis SWDEC\nFLAC SWDEC\nWave SWDEC"
},
"accessibility": {
"isActive": false,
"forceDisabled": 0,
"instantiator": ""
},
"startupCache": {
"DiskCachePath": "/home/physkets/.cache/mozilla/firefox/ew8qd2f6.default-release/startupCache/startupCache.8.little",
"IgnoreDiskCache": false,
"FoundDiskCacheOnInit": true,
"WroteToDiskCache": false
},
"libraryVersions": {
"NSPR": {
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"version": "4.38.2"
},
"NSS": {
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"version": "3.122"
},
"NSSUTIL": {
"minVersion": "3.122",
"version": "3.122"
},
"NSSSSL": {
"minVersion": "3.122",
"version": "3.122"
},
"NSSSMIME": {
"minVersion": "3.122",
"version": "3.122"
}
},
"userJS": {
"exists": false
},
"intl": {
"localeService": {
"requested": [
"en-US"
],
"available": [
"en-US",
"en-GB"
],
"supported": [
"en-US",
"en-GB"
],
"defaultLocale": "en-US"
},
"osPrefs": {
"systemLocales": [
"en-US"
],
}
},
"contentAnalysis": {
"active": false
},
"crashes": {
"submitted": [],
"pending": 0
},
"sandbox": {
"hasSeccompBPF": true,
"hasSeccompTSync": true,
"hasPrivilegedUserNamespaces": true,
"hasUserNamespaces": true,
"canSandboxContent": true,
"canSandboxMedia": true,
"syscallLog": [],
"contentSandboxLevel": 6,
"effectiveContentSandboxLevel": 6
},
"remoteAgent": {
"running": false,
"url": ""
},
"graphics": {
"desktopEnvironment": "gnome",
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"numAcceleratedWindows": 2,
"windowLayerManagerType": "WebRender",
"windowLayerManagerRemote": true,
"graphicsDevicePixelRatios": [
1.3333333333333333,
1.3333333333333333
],
"adapterDescription": "Mesa Intel(R) Graphics (ARL)",
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"adapterDeviceID": "0x7d67",
"adapterRAM": 0,
"adapterDrivers": "",
"driverVendor": "mesa/iris",
"driverVersion": "26.0.4.0",
"driverDate": "",
"adapterVendorID2": "",
"adapterDeviceID2": "",
"isGPU2Active": false,
"targetFrameRate": 60,
"windowProtocol": "wayland",
"supportFontDetermination": "Linux Unknown - ID=arch\n",
"webgl1Renderer": "Intel -- Mesa Intel(R) Graphics (ARL)",
"webgl1Version": "4.6 (Compatibility Profile) Mesa 26.0.4-arch1.1",
"webgl1DriverExtensions": "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 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_copy_depth_to_color GL_NV_depth_clamp GL_NV_fog_distance GL_NV_half_float 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_depth_bounds_test 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_ATI_texture_compression_3dc 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_compression_latc GL_EXT_texture_integer GL_EXT_texture_sRGB_decode GL_EXT_timer_query GL_OES_EGL_image GL_AMD_performance_monitor GL_EXT_texture_buffer_object GL_AMD_texture_texture4 GL_ARB_copy_buffer GL_ARB_depth_buffer_float GL_ARB_draw_instanced GL_ARB_half_float_vertex GL_ARB_instanced_arrays GL_ARB_map_buffer_range GL_ARB_texture_buffer_object GL_ARB_texture_rg GL_ARB_texture_swizzle GL_ARB_vertex_array_bgra GL_EXT_texture_swizzle GL_EXT_vertex_array_bgra GL_NV_conditional_render GL_AMD_conservative_depth GL_AMD_depth_clamp_separate GL_AMD_draw_buffers_blend GL_AMD_seamless_cubemap_per_texture GL_AMD_shader_stencil_export GL_ARB_ES2_compatibility GL_ARB_blend_func_extended GL_ARB_compatibility GL_ARB_debug_output GL_ARB_draw_buffers_blend GL_ARB_draw_elements_base_vertex GL_ARB_explicit_attrib_location GL_ARB_fragment_coord_conventions GL_ARB_provoking_vertex GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_seamless_cube_map GL_ARB_shader_stencil_export GL_ARB_shader_texture_lod GL_ARB_tessellation_shader 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"sizePerc": 0.1,
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"entity": "moz_bookmarks_dateaddedindex",
"count": "-"
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"pages": 3,
"sizeBytes": 98304,
"sizePerc": 0.4,
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"entity": "moz_bookmarks_guid_uniqueindex",
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"entity": "moz_keywords",
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"lastMaintenanceDate": 1775201060000,
"lastVacuumDate": 1774582013000,
"lastIntegrityCorruptionDate": 0
}
}Even without Firefox, when I login after two days of the desktop being left on, the Gnome UI is very very laggy.
I will test out an X11 session and report back.
I use the Intel iHD driver; I don't know if that is i915 or Xe.
$ vainfo
Trying display: wayland
vainfo: VA-API version: 1.23 (libva 2.22.0)
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 25.4.6 ()
vainfo: Supported profile and entrypoints
VAProfileNone : VAEntrypointVideoProc
VAProfileMPEG2Simple : VAEntrypointVLD
VAProfileMPEG2Main : VAEntrypointVLD
VAProfileH264Main : VAEntrypointVLD
VAProfileH264Main : VAEntrypointEncSlice
VAProfileH264High : VAEntrypointVLD
VAProfileH264High : VAEntrypointEncSlice
VAProfileJPEGBaseline : VAEntrypointVLD
VAProfileJPEGBaseline : VAEntrypointEncPicture
VAProfileH264ConstrainedBaseline: VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice
VAProfileVP8Version0_3 : VAEntrypointVLD
VAProfileHEVCMain : VAEntrypointVLD
VAProfileHEVCMain : VAEntrypointEncSlice
VAProfileHEVCMain10 : VAEntrypointVLD
VAProfileHEVCMain10 : VAEntrypointEncSlice
VAProfileVP9Profile0 : VAEntrypointVLD
VAProfileVP9Profile0 : VAEntrypointEncSlice
VAProfileVP9Profile1 : VAEntrypointVLD
VAProfileVP9Profile1 : VAEntrypointEncSlice
VAProfileVP9Profile2 : VAEntrypointVLD
VAProfileVP9Profile2 : VAEntrypointEncSlice
VAProfileVP9Profile3 : VAEntrypointVLD
VAProfileVP9Profile3 : VAEntrypointEncSlice
VAProfileHEVCMain12 : VAEntrypointVLD
VAProfileHEVCMain422_10 : VAEntrypointVLD
VAProfileHEVCMain422_12 : VAEntrypointVLD
VAProfileHEVCMain444 : VAEntrypointVLD
VAProfileHEVCMain444 : VAEntrypointEncSlice
VAProfileHEVCMain444_10 : VAEntrypointVLD
VAProfileHEVCMain444_10 : VAEntrypointEncSlice
VAProfileHEVCMain444_12 : VAEntrypointVLD
VAProfileHEVCSccMain : VAEntrypointVLD
VAProfileHEVCSccMain : VAEntrypointEncSlice
VAProfileHEVCSccMain10 : VAEntrypointVLD
VAProfileHEVCSccMain10 : VAEntrypointEncSlice
VAProfileHEVCSccMain444 : VAEntrypointVLD
VAProfileHEVCSccMain444 : VAEntrypointEncSlice
VAProfileAV1Profile0 : VAEntrypointVLD
VAProfileAV1Profile0 : VAEntrypointEncSlice
VAProfileHEVCSccMain444_10 : VAEntrypointVLD
VAProfileHEVCSccMain444_10 : VAEntrypointEncSliceYes, I do have the `vulkan-intel` package installed.
Yes, restarting the machine immediately fixes any lag.
(I haven't tried restarting just the session.. I will check that as well).
If I remember correctly, it is the `gnome-shell` process that is owned by my user that is going crazy. I don't see any other `gnome-shell` process in htop.
Last edited by physkets (2026-04-06 05:18:26)
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#9 2026-04-06 14:31:31
- seth
- Member
- From: Won't reply 2 private help req
- Registered: 2012-09-03
- Posts: 74,797
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
(I haven't tried restarting just the session.. I will check that as well).
seth wrote:
This could just be a straight gnome gnome bug, running into some live-lock/event recursion
* does gnome also use a lot of RAM?
* are there any 3rd party extensions?
* does gnome (or anything) start to spam the system journal once this happens?
* does it typically only start after (some) sleep cycles?
On a hunch, https://wiki.archlinux.org/title/Variable_refresh_rate hiccup?
for OUT in /sys/class/drm/card*; do echo $OUT; edid-decode $OUT/edid; echo "================="; doneYou'll need https://archlinux.org/packages/extra/x86_64/v4l-utils/
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#10 2026-04-07 03:10:01
- physkets
- Member
- From: India
- Registered: 2016-08-22
- Posts: 44
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
I don't remember for sure, but I don't think the gnome-shell process was hogging enough RAM to start pushing everything to SWAP (the desktop has 32GB of RAM).
But I am not sure.
There was no lag today when I began using my machine after rebooting yesterday.
This issue does crop-up only two or three days after.
But no 'sleep' involved. I leave it running because I sometimes need to access it via SSH.
I will check the journal as well as the memory usage, next time it happens.
Yes, there are three Gnome extensions:
1. AppIndicator and KStatusNotifierItem Support
2. Freon
3. Syncthing Indicator
EDID information of my display:
/sys/class/drm/card1-DP-3
edid-decode (hex):
00 ff ff ff ff ff ff 00 10 ac 66 f1 42 4d 47 41
25 23 01 04 a5 3c 22 78 3a 14 65 aa 53 4e 9f 24
0f 50 54 a5 4b 00 71 4f 81 80 a9 c0 d1 c0 81 c0
81 cf 01 01 01 01 56 5e 00 a0 a0 a0 29 50 30 20
35 00 55 50 21 00 00 1a 00 00 00 ff 00 38 38 35
56 50 42 34 0a 20 20 20 20 20 00 00 00 fc 00 44
45 4c 4c 20 50 32 37 32 35 44 45 0a 00 00 00 fd
00 32 64 1e 97 2a 01 0a 20 20 20 20 20 20 01 56
02 03 12 b1 4a 40 90 1f 04 13 12 03 11 02 01 e2
00 ea 5a a0 00 a0 a0 a0 46 50 30 20 e5 0c 55 50
21 00 00 1a 60 59 80 a0 70 38 14 40 30 20 35 00
55 50 21 00 00 1a 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 28
----------------
Block 0, Base EDID:
EDID Structure Version & Revision: 1.4
Vendor & Product Identification:
Manufacturer: DEL
Model: 61798
Serial Number: 1095191874 (0x41474d42)
Made in: week 37 of 2025
Basic Display Parameters & Features:
Digital display
Bits per primary color channel: 8
DisplayPort interface
Maximum image size: 60 cm x 34 cm
Gamma: 2.20
DPMS levels: Off
Supported color formats: RGB 4:4:4, YCrCb 4:4:4, YCrCb 4:2:2
First detailed timing includes the native pixel format and preferred refresh rate
Color Characteristics:
Red : 0.6640, 0.3251
Green: 0.3056, 0.6210
Blue : 0.1416, 0.0605
White: 0.3134, 0.3291
Established Timings I & II:
IBM : 720x400 70.081663 Hz 9:5 31.467 kHz 28.320000 MHz
DMT 0x04: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
DMT 0x06: 640x480 75.000000 Hz 4:3 37.500 kHz 31.500000 MHz
DMT 0x09: 800x600 60.316541 Hz 4:3 37.879 kHz 40.000000 MHz
DMT 0x0b: 800x600 75.000000 Hz 4:3 46.875 kHz 49.500000 MHz
DMT 0x10: 1024x768 60.003840 Hz 4:3 48.363 kHz 65.000000 MHz
DMT 0x12: 1024x768 75.028582 Hz 4:3 60.023 kHz 78.750000 MHz
DMT 0x24: 1280x1024 75.024675 Hz 5:4 79.976 kHz 135.000000 MHz
Standard Timings:
DMT 0x15: 1152x864 75.000000 Hz 4:3 67.500 kHz 108.000000 MHz
DMT 0x23: 1280x1024 60.019740 Hz 5:4 63.981 kHz 108.000000 MHz
DMT 0x53: 1600x900 60.000000 Hz 16:9 60.000 kHz 108.000000 MHz (RB)
DMT 0x52: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz
DMT 0x55: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz
GTF : 1280x720 74.999686 Hz 16:9 56.400 kHz 95.654000 MHz
Detailed Timing Descriptors:
DTD 1: 2560x1440 59.950550 Hz 16:9 88.787 kHz 241.500000 MHz (597 mm x 336 mm)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 5 Vback 33 Vpol N
Display Product Serial Number: '885VPB4'
Display Product Name: 'DELL P2725DE'
Display Range Limits:
Monitor ranges (Range Limits Only): 50-100 Hz V, 30-151 kHz H, max dotclock 420 MHz
Extension blocks: 1
Checksum: 0x56
----------------
Block 1, CTA-861 Extension Block:
Revision: 3
Underscans IT Video Formats by default
Supports YCbCr 4:4:4
Supports YCbCr 4:2:2
Native detailed modes: 1
Video Data Block:
VIC 64: 1920x1080 100.000000 Hz 16:9 112.500 kHz 297.000000 MHz
VIC 16: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz (native)
VIC 31: 1920x1080 50.000000 Hz 16:9 56.250 kHz 148.500000 MHz
VIC 4: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz
VIC 19: 1280x720 50.000000 Hz 16:9 37.500 kHz 74.250000 MHz
VIC 18: 720x576 50.000000 Hz 16:9 31.250 kHz 27.000000 MHz
VIC 3: 720x480 59.940060 Hz 16:9 31.469 kHz 27.000000 MHz
VIC 17: 720x576 50.000000 Hz 4:3 31.250 kHz 27.000000 MHz
VIC 2: 720x480 59.940060 Hz 4:3 31.469 kHz 27.000000 MHz
VIC 1: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
Video Capability Data Block:
YCbCr quantization: Selectable (via AVI YQ)
RGB quantization: Selectable (via AVI Q)
PT scan behavior: Always Underscanned
IT scan behavior: Always Underscanned
CE scan behavior: Always Underscanned
Detailed Timing Descriptors:
DTD 2: 2560x1440 99.946436 Hz 16:9 150.919 kHz 410.500000 MHz (597 mm x 336 mm)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 62 Vsync 5 Vback 3 Vpol N
DTD 3: 1920x1080 100.000000 Hz 16:9 110.000 kHz 228.800000 MHz (597 mm x 336 mm)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 5 Vback 12 Vpol N
Checksum: 0x28 Unused space in Extension Block: 73 bytesI do seem to already have the v4l-utils package installed as a dependency of ffmpeg etc.
Last edited by physkets (2026-04-07 03:12:54)
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#11 2026-04-07 07:20:17
- seth
- Member
- From: Won't reply 2 private help req
- Registered: 2012-09-03
- Posts: 74,797
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
There're some 100Hz modes but the default is (unsuspiciously) 60Hz and the output doesn't provide VRR
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#12 2026-04-07 08:04:39
- physkets
- Member
- From: India
- Registered: 2016-08-22
- Posts: 44
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
Huh.. okay, I'm disabling Freon.. will examine for a week to see if things change.
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#13 2026-04-13 03:29:04
- physkets
- Member
- From: India
- Registered: 2016-08-22
- Posts: 44
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
So I disabled all extensions and have had no problems since.
This is maybe the fourth time in some 15 years of using Gnome that I've had to learn this lesson!!
When will it stick!? I keep hoping that that they'd have gotten better.
Gnome really needs to re-design their extension system so that such user-made stuff can't affect performance too much.
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#14 2026-04-13 06:56:46
- seth
- Member
- From: Won't reply 2 private help req
- Registered: 2012-09-03
- Posts: 74,797
Re: [SOLVED] Laggy response with high CPU usage by gnome-shell
That's about the least problem of the gnome-extension system (the monkey patching approach constantly breaks them - the performance issue might just be the result of a slight incompatibility after the update)
Inform the maintainer of the extension and then please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.
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