Karabiner-NotificationWindow Occupying CPU Cycles

[asugerman]

macOS version: macOS 10.14.6 Karabiner version: Karabiner-Elements 12.6.0 Your Mac hardware: MacBook Pro Your keyboard hardware: MacBook Pro

Computer is sluggish and when I check the Activity Monitor, the process "Karabiner-NotificationWindow" is generally in the 20-25% range, which seems like way too much. I don't remember seeing it occupy this much activity in the past and nothing comes close besides the WindowServer. Is this a new issue or has something changed recently? I recall updating to a new Karabiner just a few days ago.

Thanks, -Adam

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[wongjustin99]

I'm having this issue as well, it happens even when I leave my computer idle for hours. I come back and hear the fans spin up because of this process. I'm using latest beta 12.8.4, but only because was trying this to fix the issue, was using latest GA before that.

[brentgreeff]

Same issue with 12.9.0. - 14-22% CPU usage which is ridiculous. I also noticed that there have been 792214 faults. I have the exact same issue where the fan comes on when the computer is idle.

Content from my log:

[2020-03-07 07:19:14.684] [info] [observer] registry_entry_id: 4295013745 [2020-03-07 07:19:14.684] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 07:19:14.701] [info] [observer] vendor_id: 1452 [2020-03-07 07:19:14.701] [info] [observer] product_id: 630 [2020-03-07 07:19:14.701] [info] [observer] location_id: 0x1000000 [2020-03-07 07:19:14.701] [info] [observer] is_keyboard: false [2020-03-07 07:19:14.701] [info] [observer] is_pointing_device: true [2020-03-07 07:19:14.702] [info] [observer] rescan devices... [2020-03-07 07:19:14.702] [info] [observer] matching device: [2020-03-07 07:19:14.702] [info] [observer] registry_entry_id: 4295013738 [2020-03-07 07:19:14.702] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 07:19:14.702] [info] [observer] vendor_id: 1452 [2020-03-07 07:19:14.702] [info] [observer] product_id: 630 [2020-03-07 07:19:14.702] [info] [observer] location_id: 0x1000000 [2020-03-07 07:19:14.702] [info] [observer] is_keyboard: true [2020-03-07 07:19:14.702] [info] [observer] is_pointing_device: false [2020-03-07 07:19:14.703] [info] [observer] rescan devices... [2020-03-07 07:19:14.705] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295013738) is observed. [2020-03-07 07:19:14.726] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295013745) is observed. [2020-03-07 07:19:15.480] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013738) is grabbed. [2020-03-07 07:28:18.212] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013738) is terminated. [2020-03-07 07:28:18.242] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013745) is terminated. [2020-03-07 07:28:18.617] [info] [observer] device_id:4295013745 is terminated. [2020-03-07 07:28:18.685] [info] [observer] device_id:4295013738 is terminated. [2020-03-07 07:28:18.686] [info] [observer] rescan devices... [2020-03-07 07:28:18.687] [info] [observer] rescan devices... [2020-03-07 07:28:18.687] [info] [observer] matching device: [2020-03-07 07:28:18.687] [info] [observer] registry_entry_id: 4295013807 [2020-03-07 07:28:18.687] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 07:28:18.687] [info] [observer] vendor_id: 1452 [2020-03-07 07:28:18.687] [info] [observer] product_id: 630 [2020-03-07 07:28:18.687] [info] [observer] location_id: 0x1000000 [2020-03-07 07:28:18.687] [info] [observer] is_keyboard: false [2020-03-07 07:28:18.687] [info] [observer] is_pointing_device: true [2020-03-07 07:28:18.687] [info] [observer] rescan devices... [2020-03-07 07:28:18.688] [info] [observer] matching device: [2020-03-07 07:28:18.688] [info] [observer] registry_entry_id: 4295013800 [2020-03-07 07:28:18.688] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 07:28:18.688] [info] [observer] vendor_id: 1452 [2020-03-07 07:28:18.688] [info] [observer] product_id: 630 [2020-03-07 07:28:18.688] [info] [observer] location_id: 0x1000000 [2020-03-07 07:28:18.688] [info] [observer] is_keyboard: true [2020-03-07 07:28:18.688] [info] [observer] is_pointing_device: false [2020-03-07 07:28:18.688] [info] [observer] rescan devices... [2020-03-07 07:28:18.690] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295013800) is observed. [2020-03-07 07:28:18.717] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295013807) is observed. [2020-03-07 07:28:19.220] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013800) is grabbed. [2020-03-07 07:37:23.253] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013800) is terminated. [2020-03-07 07:37:23.272] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013807) is terminated. [2020-03-07 07:37:23.803] [info] [observer] device_id:4295013800 is terminated. [2020-03-07 07:37:23.975] [info] [observer] device_id:4295013807 is terminated. [2020-03-07 07:37:23.978] [info] [observer] rescan devices... [2020-03-07 07:37:23.978] [info] [observer] rescan devices... [2020-03-07 07:37:23.978] [info] [observer] matching device: [2020-03-07 07:37:23.978] [info] [observer] registry_entry_id: 4295013869 [2020-03-07 07:37:23.978] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 07:37:23.978] [info] [observer] vendor_id: 1452 [2020-03-07 07:37:23.978] [info] [observer] product_id: 630 [2020-03-07 07:37:23.983] [info] [observer] location_id: 0x1000000 [2020-03-07 07:37:23.983] [info] [observer] is_keyboard: false [2020-03-07 07:37:23.983] [info] [observer] is_pointing_device: true [2020-03-07 07:37:23.984] [info] [observer] rescan devices... [2020-03-07 07:37:23.984] [info] [observer] matching device: [2020-03-07 07:37:23.984] [info] [observer] registry_entry_id: 4295013862 [2020-03-07 07:37:23.985] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 07:37:23.985] [info] [observer] vendor_id: 1452 [2020-03-07 07:37:23.985] [info] [observer] product_id: 630 [2020-03-07 07:37:23.985] [info] [observer] location_id: 0x1000000 [2020-03-07 07:37:23.985] [info] [observer] is_keyboard: true [2020-03-07 07:37:23.985] [info] [observer] is_pointing_device: false [2020-03-07 07:37:23.985] [info] [observer] rescan devices... [2020-03-07 07:37:24.056] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295013862) is observed. [2020-03-07 07:37:24.087] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295013869) is observed. [2020-03-07 07:37:24.290] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013862) is grabbed. [2020-03-07 07:46:28.335] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013862) is ungrabbed. [2020-03-07 07:46:28.340] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013869) is terminated. [2020-03-07 07:46:28.347] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013862) is terminated. [2020-03-07 07:46:28.511] [info] [observer] device_id:4295013862 is terminated. [2020-03-07 07:46:28.513] [info] [observer] device_id:4295013869 is terminated. [2020-03-07 07:46:28.634] [info] [observer] rescan devices... [2020-03-07 07:46:28.634] [info] [observer] rescan devices... [2020-03-07 07:46:28.661] [info] [observer] matching device: [2020-03-07 07:46:28.687] [info] [observer] registry_entry_id: 4295013931 [2020-03-07 07:46:28.687] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 07:46:28.689] [info] [observer] vendor_id: 1452 [2020-03-07 07:46:28.689] [info] [observer] product_id: 630 [2020-03-07 07:46:28.689] [info] [observer] location_id: 0x1000000 [2020-03-07 07:46:28.689] [info] [observer] is_keyboard: true [2020-03-07 07:46:28.690] [info] [observer] is_pointing_device: false [2020-03-07 07:46:28.693] [info] [observer] rescan devices... [2020-03-07 07:46:28.693] [info] [observer] matching device: [2020-03-07 07:46:28.693] [info] [observer] registry_entry_id: 4295013938 [2020-03-07 07:46:28.694] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 07:46:28.694] [info] [observer] vendor_id: 1452 [2020-03-07 07:46:28.694] [info] [observer] product_id: 630 [2020-03-07 07:46:28.694] [info] [observer] location_id: 0x1000000 [2020-03-07 07:46:28.694] [info] [observer] is_keyboard: false [2020-03-07 07:46:28.694] [info] [observer] is_pointing_device: true [2020-03-07 07:46:28.829] [info] [observer] rescan devices... [2020-03-07 07:46:29.087] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295013931) is observed. [2020-03-07 07:46:29.107] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295013938) is observed. [2020-03-07 07:46:29.348] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013931) is grabbed. [2020-03-07 07:55:32.286] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013931) is ungrabbed. [2020-03-07 07:55:32.297] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013938) is terminated. [2020-03-07 07:55:32.313] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013931) is terminated. [2020-03-07 07:55:32.543] [info] [observer] device_id:4295013938 is terminated. [2020-03-07 07:55:32.558] [info] [observer] device_id:4295013931 is terminated. [2020-03-07 07:55:32.558] [info] [observer] rescan devices... [2020-03-07 07:55:32.558] [info] [observer] rescan devices... [2020-03-07 07:55:32.558] [info] [observer] matching device: [2020-03-07 07:55:32.558] [info] [observer] registry_entry_id: 4295014000 [2020-03-07 07:55:32.558] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 07:55:32.558] [info] [observer] vendor_id: 1452 [2020-03-07 07:55:32.558] [info] [observer] product_id: 630 [2020-03-07 07:55:32.559] [info] [observer] location_id: 0x1000000 [2020-03-07 07:55:32.559] [info] [observer] is_keyboard: false [2020-03-07 07:55:32.559] [info] [observer] is_pointing_device: true [2020-03-07 07:55:32.559] [info] [observer] rescan devices... [2020-03-07 07:55:32.559] [info] [observer] matching device: [2020-03-07 07:55:32.559] [info] [observer] registry_entry_id: 4295013993 [2020-03-07 07:55:32.559] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 07:55:32.559] [info] [observer] vendor_id: 1452 [2020-03-07 07:55:32.559] [info] [observer] product_id: 630 [2020-03-07 07:55:32.559] [info] [observer] location_id: 0x1000000 [2020-03-07 07:55:32.559] [info] [observer] is_keyboard: true [2020-03-07 07:55:32.559] [info] [observer] is_pointing_device: false [2020-03-07 07:55:32.567] [info] [observer] rescan devices... [2020-03-07 07:55:32.627] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295013993) is observed. [2020-03-07 07:55:32.648] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295014000) is observed. [2020-03-07 07:55:33.303] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013993) is grabbed. [2020-03-07 08:04:37.237] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295013993) is terminated. [2020-03-07 08:04:37.263] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295014000) is terminated. [2020-03-07 08:04:37.784] [info] [observer] device_id:4295014000 is terminated. [2020-03-07 08:04:37.787] [info] [observer] rescan devices... [2020-03-07 08:04:37.787] [info] [observer] device_id:4295013993 is terminated. [2020-03-07 08:04:37.798] [info] [observer] rescan devices... [2020-03-07 08:04:37.798] [info] [observer] matching device: [2020-03-07 08:04:37.798] [info] [observer] registry_entry_id: 4295014062 [2020-03-07 08:04:37.798] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 08:04:37.804] [info] [observer] vendor_id: 1452 [2020-03-07 08:04:37.804] [info] [observer] product_id: 630 [2020-03-07 08:04:37.804] [info] [observer] location_id: 0x1000000 [2020-03-07 08:04:37.804] [info] [observer] is_keyboard: false [2020-03-07 08:04:37.804] [info] [observer] is_pointing_device: true [2020-03-07 08:04:37.805] [info] [observer] rescan devices... [2020-03-07 08:04:37.806] [info] [observer] matching device: [2020-03-07 08:04:37.806] [info] [observer] registry_entry_id: 4295014055 [2020-03-07 08:04:37.806] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 08:04:37.806] [info] [observer] vendor_id: 1452 [2020-03-07 08:04:37.806] [info] [observer] product_id: 630 [2020-03-07 08:04:37.806] [info] [observer] location_id: 0x1000000 [2020-03-07 08:04:37.806] [info] [observer] is_keyboard: true [2020-03-07 08:04:37.806] [info] [observer] is_pointing_device: false [2020-03-07 08:04:37.807] [info] [observer] rescan devices... [2020-03-07 08:04:37.833] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295014055) is observed. [2020-03-07 08:04:37.843] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295014062) is observed. [2020-03-07 08:04:38.222] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295014055) is grabbed. [2020-03-07 08:05:47.424] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295014062) is terminated. [2020-03-07 08:05:47.432] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295014055) is terminated. [2020-03-07 08:05:48.290] [info] [observer] device_id:4295014055 is terminated. [2020-03-07 08:05:48.439] [warning] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295014117) is not observed yet. Please wait for a while. [2020-03-07 08:05:48.460] [info] [observer] device_id:4295014062 is terminated. [2020-03-07 08:05:48.535] [info] [observer] rescan devices... [2020-03-07 08:05:48.535] [info] [observer] rescan devices... [2020-03-07 08:05:48.535] [info] [observer] matching device: [2020-03-07 08:05:48.535] [info] [observer] registry_entry_id: 4295014117 [2020-03-07 08:05:48.535] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 08:05:48.535] [info] [observer] vendor_id: 1452 [2020-03-07 08:05:48.535] [info] [observer] product_id: 630 [2020-03-07 08:05:48.536] [info] [observer] location_id: 0x1000000 [2020-03-07 08:05:48.536] [info] [observer] is_keyboard: true [2020-03-07 08:05:48.536] [info] [observer] is_pointing_device: false [2020-03-07 08:05:48.537] [info] [observer] rescan devices... [2020-03-07 08:05:48.537] [info] [observer] matching device: [2020-03-07 08:05:48.537] [info] [observer] registry_entry_id: 4295014124 [2020-03-07 08:05:48.537] [info] [observer] product: Apple Internal Keyboard / Trackpad [2020-03-07 08:05:48.537] [info] [observer] vendor_id: 1452 [2020-03-07 08:05:48.537] [info] [observer] product_id: 630 [2020-03-07 08:05:48.537] [info] [observer] location_id: 0x1000000 [2020-03-07 08:05:48.537] [info] [observer] is_keyboard: false [2020-03-07 08:05:48.537] [info] [observer] is_pointing_device: true [2020-03-07 08:05:48.537] [info] [observer] rescan devices... [2020-03-07 08:05:48.587] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295014117) is observed. [2020-03-07 08:05:48.590] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295014117) is grabbed. [2020-03-07 08:05:48.682] [info] [observer] Apple Internal Keyboard / Trackpad (device_id:4295014124) is observed. [2020-03-07 08:39:16.968] [info] [observer] matching device: [2020-03-07 08:39:16.968] [info] [observer] registry_entry_id: 4295014419 [2020-03-07 08:39:16.968] [info] [observer] product: USB Optical Mouse [2020-03-07 08:39:16.968] [info] [observer] vendor_id: 7119 [2020-03-07 08:39:16.968] [info] [observer] product_id: 5 [2020-03-07 08:39:16.968] [info] [observer] location_id: 0x14320000 [2020-03-07 08:39:16.968] [info] [observer] is_keyboard: false [2020-03-07 08:39:16.968] [info] [observer] is_pointing_device: true [2020-03-07 08:39:16.985] [info] [observer] rescan devices... [2020-03-07 08:39:17.165] [info] [observer] USB Optical Mouse (device_id:4295014419) is observed. [2020-03-07 11:14:08.381] [info] [grabber] USB Optical Mouse (device_id:4295014419) is terminated. [2020-03-07 11:14:08.387] [info] [observer] device_id:4295014419 is terminated. [2020-03-07 11:14:08.390] [info] [observer] rescan devices... [2020-03-07 17:37:55.430] [info] [observer] matching device: [2020-03-07 17:37:55.431] [info] [observer] registry_entry_id: 4295019895 [2020-03-07 17:37:55.431] [info] [observer] product: USB Optical Mouse [2020-03-07 17:37:55.431] [info] [observer] vendor_id: 7119 [2020-03-07 17:37:55.431] [info] [observer] product_id: 5 [2020-03-07 17:37:55.431] [info] [observer] location_id: 0x14320000 [2020-03-07 17:37:55.431] [info] [observer] is_keyboard: false [2020-03-07 17:37:55.431] [info] [observer] is_pointing_device: true [2020-03-07 17:37:55.433] [info] [observer] rescan devices... [2020-03-07 17:37:55.434] [info] [observer] USB Optical Mouse (device_id:4295019895) is observed. [2020-03-07 19:37:16.403] [error] [grabber] console_user_server_client error: Connection reset by peer [2020-03-07 19:37:16.403] [info] [grabber] console_user_server_client is closed. (uid:501) [2020-03-07 19:37:16.420] [info] [grabber] event_tap_monitor terminated [2020-03-07 19:37:16.517] [info] [observer] device_id:4294976368 is terminated. [2020-03-07 19:37:16.523] [info] [grabber] virtual_hid_device_client is closed. [2020-03-07 19:37:16.524] [info] [grabber] device_grabber is stopped. [2020-03-07 19:37:16.547] [info] [observer] rescan devices... [2020-03-07 19:40:26.529] [info] [console_user_server] version 12.9.0 [2020-03-07 19:40:26.673] [info] [console_user_server] receiver is initialized [2020-03-07 19:40:26.675] [info] [console_user_server] receiver: bound [2020-03-07 19:40:26.675] [info] [console_user_server] grabber_client is started. [2020-03-07 19:40:26.675] [info] [console_user_server] grabber_client is connected. [2020-03-07 19:40:26.909] [info] [grabber] karabiner_console_user_server is connected. [2020-03-07 19:40:26.909] [info] [console_user_server] Load /Users/brentgreeff/.config/karabiner/karabiner.json... [2020-03-07 19:40:26.910] [info] [grabber] console_user_server_client is connected. (uid:501) [2020-03-07 19:40:26.911] [info] [grabber] device_grabber is started. [2020-03-07 19:40:26.923] [info] [console_user_server] core_configuration is updated. [2020-03-07 19:40:26.928] [info] [grabber] event_tap_monitor initialized [2020-03-07 19:40:26.929] [info] [grabber] virtual_hid_device_client is started. [2020-03-07 19:40:26.929] [info] [grabber] Load /Users/brentgreeff/.config/karabiner/karabiner.json... [2020-03-07 19:40:26.931] [info] [grabber] core_configuration is updated. [2020-03-07 19:40:26.932] [info] [grabber] virtual_hid_device_client is opened. [2020-03-07 19:40:26.933] [info] [grabber] virtual_hid_deviceclient is connected [2020-03-07 19:40:26.933] [info] [grabber] initialize_virtual_hid_keyboard [2020-03-07 19:40:26.933] [info] [grabber] country_code:0 [2020-03-07 19:40:26.934] [info] [grabber] initialize_virtual_hid_keyboard [2020-03-07 19:40:26.934] [info] [grabber] country_code:0 [2020-03-07 19:40:26.942] [info] [observer] matching device: [2020-03-07 19:40:26.942] [info] [observer] registry_entry_id: 4295022081 [2020-03-07 19:40:26.942] [info] [observer] manufacturer: pqrs.org [2020-03-07 19:40:26.942] [info] [observer] product: Karabiner VirtualHIDKeyboard [2020-03-07 19:40:26.942] [info] [observer] vendor_id: 5824 [2020-03-07 19:40:26.942] [info] [observer] product_id: 10203 [2020-03-07 19:40:26.942] [info] [observer] location_id: 0x0 [2020-03-07 19:40:26.942] [info] [observer] serial_number: pqrs.org:org_pqrs_driver_Karabiner_VirtualHIDDevice_VirtualHIDKeyboard_v061000 [2020-03-07 19:40:26.942] [info] [observer] is_keyboard: true [2020-03-07 19:40:26.942] [info] [observer] is_pointing_device: false [2020-03-07 19:40:26.948] [info] [observer] rescan devices... [2020-03-07 19:40:26.981] [info] [observer] Karabiner VirtualHIDKeyboard (device_id:4295022081) is observed. [2020-03-07 19:40:27.048] [info] [console_user_server] Check for updates... [2020-03-07 19:40:27.175] [info] [grabber] system_preferences is updated. [2020-03-07 19:40:27.949] [info] [grabber] Apple Internal Keyboard / Trackpad (device_id:4295014117) is grabbed.

[nissenbenyitskhak]

I am having this same or similar issue with karabiner_observer and karabiner_grabber using way too much CPU time. In fact, I have 2 each of karabiner_grabber and karabiner_observer processes. One karabiner_observer has used 2:21:21.77 of CPU time (about 2.5 HOURS of CPU time) and one karabiner_grabber has used 3:13:24.44 of CPU time (over 3 HOURS of CPU time). Activity monitor screen is attached. That's 5 ½ hours of CPU time for a keyboard mapper!

I am using MacOS Catalina 10.15.5 on a 15" 2018 MacBook Pro with 32GB of memory.

[brentgreeff]

This is happening every day now - around 5pm. If I kill Karabiner-NotificationWindow it doesnt help

• SystemUIServer is using 15-20% and killing that process doesnt help
• it just restarts by itself & goes back to work spinning in a circle. I either need to reboot, or I just discovered I can open Karabiner & restart - that gets rid of SystemUIServer and the fans calm down eventually.

What is Karabiner trying to notify me about?

[brentgreeff]

Every day at 5:30pm German time (Central European Standard Time) - there goes my fans. I tried to reload today but that didn't work - had to restart my computer. How can I debug this - its infuriating.

[brentgreeff]

Restarting my machine didnt help. Quiting & restarting Karabiner didnt help.

• had to uninstall

[tyteen4a03]

Still an issue - it happens for me when I plug in an external drive for Time Machine backups.

[hieast]

I'm having this issue as well. I come back after leaving my computer idle for tens of minutes and see this process occupying 90+% CPU usage. Kill this process worked but it will happen again some time.

macOS version: macOS 11.4 (20F71) Karabiner version: Karabiner-Elements 13.5.0 Your Mac hardware: MacBook Pro Your keyboard hardware: MacBook Pro

[amirmohsen-am]

I'm having the same issue in macOS 12.0.1 on an m1 macbook pro

[brianherbert]

I woke my M1 Max from sleep to find Karabiner-NotificationWindow occupying 100% CPU along with WindowServer. Machine was barely usable (extremely sluggish). Force quitting the process just now solved the problem.

[gholmes829]

Using macOS 12.01 on 2021 M1 MacBook Pro with min hardware specs. I am not currently noticing excessive cpu use at 1.1%.

It does look like Karabiner-NotificationWindow is using excessive memory however. I killed and restarted karabiner after noticing it using 800+ MB. After killing and restarting it, I actually got prompted to update karabiner. I did so and proceeded to observe it using 100 MB which seems more reasonable. I don't know if this is important, but killing this process caused my computer to freeze which then forced me to the login screen some 15 seconds later.

I'm checking again this evening and its currently using 500+ MB which seems high again. It doesn't seem normal to have the service jump from using 100 MB to 800+ MB for one key remapping, but maybe I'm mistaken.

[jarppe]

14" MacBook Pro 2021 with Monterey 12.0.1, M1 Max and 64GB RAM. Occasionally the Karabiner-NotificationWindow spins up and eats 100% CPU making the whole machine unusable. The mouse staggers etc. Usually the NotificationWindow stops this by itself after a minute or so. Seems to happen more and more often.

[ericboehs]

For those still having this problem, check out my answer on the sister issue:

I went to the Devices preference tab in Karabiner and unchecked all the devices except my internal keyboard (M1 MacBook Pro) and my Apple wireless. (I also rebooted.)

Edit: Still have high CPU after waking from sleep. Reboot fixes until it sleeps again.

[konn]

Same issue here with macOS Big Sur 11.6.1 on MacBook Pro (15-inch, 2019).

[DennisSchwartz]

Same issue on macOS 12.0.1 with 2021 M1 16" Mbp. Killing the process basically crashes the machine and logs me out. It's a real issue for me.

[quinncomendant]

My Karabiner-NotificationWindow process is using 0% CPU, but it is using 840 MB of Memory. That's too much, right?

Karabiner-Elements 14.3.0 macOS 12.1 2021 MacBook Pro 14"

[konn]

So far, it solves the problem by killing Karabiner-NotificationWindow (not WindowServer, as it logs me out as already pointed out) every time the machine awakens from sleep and causes no problem. I automate this workflow by combining sleepwatcher with launchd. This temporary workaround DOES work, but it is desirable if such a workaround is no longer needed.

[claytono]

I've seen this a number of times since getting an M1 MBP. It's using 100% cpu and making the entire system slow. Restarting Karabiner Elements fixes it until it happens again.

[luispedrofonseca]

Getting the same issue described above. M1 Max with 32GB of RAM. Every now and then Karabiner-NotificationWindow decides to go to 100% along with WindowServer which makes the computer sluggish. Hoping for a fix!

[phu54321]

Same issue. this issue should be re-opened. Restarting karabiner elements (Karabiner Elements Preference → Misc → Restart Karabiner-Elements) fixes the issue.

[cornedriesprong]

Happens to me too on 14" M1 Macbook Pro

[sileht]

Idem here on Macbook Air 14" monterey

[luispedrofonseca]

For anyone still fighting with this and is only doing simple key remapping I highly recommend looking into this: https://hidutil-generator.netlify.app/

For me it completely replaced Karabiner and I'm quite happy to have one less intrusive app running on my system.

[stefanli]

While I really appreciate all the work that has gone into this free app, I had to uninstall because of this issue as it was crippling my system. For anyone that's looking for an alternative (albeit paid), better touch tool can provide some of the same functionality.

In my cases I was remapping caps lock to hyper key: https://community.folivora.ai/t/thank-you-for-capslock-hyper-a-small-request/20907

[Deichscheich]

This impacts me, too. My MBP feels sluggish, when I restart Karabiner from within the program, my OS crashes and I need to hot reboot.

[jasonlong]

Happening for me as well on a brand new 14" M1 Max. For me, I feel like it happens when connecting and disconnecting from my Caldigit hub and LG monitor. That desktop setup has a USB wired mechanical keyboard, but I've disabled that keyboard in the Karabiner options.

[moltar]

Same here. The computer won't even go to sleep. When I open it again, the CPU is at 70% for the process. Nuts!

[phu54321]

Since this issue is closed I think we need to continue this discussion on #2969