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#1 2026-04-01 08:54:50
- physkets
- Member
- From: India
- Registered: 2016-08-22
- Posts: 43
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?
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#2 2026-04-01 14:50:19
- physkets
- Member
- From: India
- Registered: 2016-08-22
- Posts: 43
Re: 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: Don't DM me only for attention
- Registered: 2012-09-03
- Posts: 74,257
Re: 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: 43
Re: 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: Don't DM me only for attention
- Registered: 2012-09-03
- Posts: 74,257
Re: 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: 43
Re: 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: Don't DM me only for attention
- Registered: 2012-09-03
- Posts: 74,257
Re: 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: 43
Re: 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",
"privacy.purge_trackers.date_in_cookie_database": "0",
"privacy.sanitize.pending": "[{\"id\":\"newtab-container\",\"itemsToClear\":[],\"options\":{}}]",
"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,
"services.sync.engine.addresses.available": true,
"services.sync.engine.addresses": true,
"services.sync.engine.addons": false,
"services.sync.engine.creditcards": true,
"services.sync.engine.prefs.modified": false,
"signon.firefoxRelay.showToAllBrowsers": true,
"signon.management.page.breach-alerts.enabled": false,
"signon.rememberSignons": false,
"signon.rustMirror.migrationNeeded": true,
"storage.vacuum.last.places.sqlite": 1774582013,
"storage.vacuum.last.content-prefs.sqlite": 1774841749,
"storage.vacuum.last.index": 2,
"widget.use-xdg-desktop-portal.file-picker": 1,
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"widget.use-xdg-desktop-portal.open-uri": 1,
"widget.use-xdg-desktop-portal.settings": 1
},
"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": {
"minVersion": "4.38.2",
"version": "4.38.2"
},
"NSS": {
"minVersion": "3.122",
"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 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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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"entity": "moz_bookmarks_dateaddedindex",
"count": "-"
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"pages": 3,
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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: Don't DM me only for attention
- Registered: 2012-09-03
- Posts: 74,257
Re: 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 Yesterday 03:10:01
- physkets
- Member
- From: India
- Registered: 2016-08-22
- Posts: 43
Re: 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 (Yesterday 03:12:54)
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#11 Yesterday 07:20:17
- seth
- Member
- From: Don't DM me only for attention
- Registered: 2012-09-03
- Posts: 74,257
Re: 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 Yesterday 08:04:39
- physkets
- Member
- From: India
- Registered: 2016-08-22
- Posts: 43
Re: 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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