WebUI unresponsive

What is the problem?

WebUI becomes responsive to commands like reboot, restart, save, and controls like cancel or pause.

What did you already try to solve it?

reflashed octopi to 0.17, 0.18, and tried the nightly builds all with the same result.

Have you tried running in safe mode?

Yes

Did running in safe mode solve the problem?

No, after approximately 10 seconds to 1 minute the WebUI was unresponsive to commands again.

Complete Logs

octoprint.log, serial.log or output on terminal tab at a minimum, browser error console if UI issue ... no logs, no support! Not log excerpts, complete logs.)

Linux (linux). Details:
|  hardware:
|      cores: 4
|      freq: 1500.0
|      ram: 3959975936
|  os:
|      bits: 32
|      id: linux
|      platform: linux
|  plugins:
|      pi_support:
|          model: Raspberry Pi 4 Model B Rev 1.2
|          octopi_version: 1.0.0
|          throttle_state: '0x0'
|  python:
|      pip: 21.0.1
|      version: 3.7.3
|      virtualenv: /home/pi/oprint
2021-02-16 18:17:21,821 - octoprint.server - INFO - Reset webasset folder /home/pi/.octoprint/generated/webassets...
2021-02-16 18:17:21,843 - octoprint.server - INFO - Reset webasset folder /home/pi/.octoprint/generated/.webassets-cache...
2021-02-16 18:17:22,376 - octoprint.server - INFO - Shutting down intermediary server...
2021-02-16 18:17:22,702 - octoprint.server - INFO - Intermediary server shut down
2021-02-16 18:17:22,704 - octoprint.events - INFO - Processing startup event, this is our first event
2021-02-16 18:17:22,705 - octoprint.events - INFO - Adding 1 events to queue that were held back before startup event
2021-02-16 18:17:22,706 - octoprint.filemanager - INFO - Adding backlog items from all storage types to analysis queue...
2021-02-16 18:17:22,710 - octoprint.server - INFO - Autoconnect on startup is configured, trying to connect to the printer...
2021-02-16 18:17:22,712 - octoprint.filemanager - INFO - Added 0 items from storage type "local" to analysis queue
2021-02-16 18:17:22,734 - octoprint.server - INFO - Trying to connect to configured serial port /dev/ttyUSB0
2021-02-16 18:17:22,760 - octoprint.util.comm - INFO - Changing monitoring state from "Offline" to "Opening serial connection"
2021-02-16 18:17:22,761 - octoprint.util.comm - INFO - Connecting to port /dev/ttyUSB0, baudrate 115200
2021-02-16 18:17:22,774 - octoprint.server.util.watchdog - INFO - Running initial scan on watched folder...
2021-02-16 18:17:22,785 - octoprint.server.util.watchdog - INFO - ... initial scan done.
2021-02-16 18:17:22,794 - octoprint.util.comm - INFO - Changing monitoring state from "Opening serial connection" to "Connecting"
2021-02-16 18:17:22,798 - octoprint.util.comm - INFO - M110 detected, setting current line number to 0
2021-02-16 18:17:22,800 - octoprint.util.comm - INFO - M110 detected, setting current line number to 0
2021-02-16 18:17:22,812 - octoprint.util.comm - INFO - Changing monitoring state from "Connecting" to "Operational"
2021-02-16 18:17:22,817 - octoprint.util.comm - INFO - M110 detected, setting current line number to 0
2021-02-16 18:17:22,859 - octoprint.util.comm - INFO - Printer reports firmware name "Marlin bugfix-2.0.x (Feb 15 2021"
2021-02-16 18:17:22,860 - octoprint.plugins.firmware_check - INFO - Your printer's firmware is a development build. It might be more unstable than a release version and should be updated regularly.. More information at https://faq.octoprint.org/warning-firmware-development
2021-02-16 18:17:22,867 - octoprint.util.comm - INFO - Firmware states that it supports temperature autoreporting
2021-02-16 18:17:23,587 - octoprint.plugins.discovery - INFO - Registered 'OctoPrint instance "Ender 3 v2"._http._tcp.local.' for _http._tcp.local.
2021-02-16 18:17:24,400 - octoprint.plugins.discovery - INFO - Registered 'OctoPrint instance "Ender 3 v2"._octoprint._tcp.local.' for _octoprint._tcp.local.
2021-02-16 18:17:24,404 - octoprint.plugins.discovery - INFO - Registered OctoPrint instance "Ender 3 v2" for SSDP
2021-02-16 18:17:24,464 - octoprint.plugins.octoeverywhere - INFO - OctoPrint port 5000
2021-02-16 18:17:24,577 - octoprint.server - INFO - Listening on http://127.0.0.1:5000
2021-02-16 18:17:24,613 - octoprint.plugins.pluginmanager - INFO - Loaded plugin repository data from disk, was still valid
2021-02-16 18:17:25,180 - octoprint.util.pip - INFO - Using "/home/pi/oprint/bin/python3 -m pip" as command to invoke pip
2021-02-16 18:17:25,193 - octoprint.util.pip - INFO - pip installs to /home/pi/oprint/lib/python3.7/site-packages (writable -> yes), --user flag needed -> no, virtual env -> yes
2021-02-16 18:17:25,239 - octoprint.util.pip - INFO - ==> pip ok -> yes
2021-02-16 18:17:25,384 - octoprint.plugins.softwareupdate - INFO - Minimum free storage across all update relevant locations is 25.0GB. That is considered sufficient for updating.
2021-02-16 18:17:25,385 - octoprint.plugins.softwareupdate - INFO - Not fetching check overlays, we are offline
2021-02-16 18:17:25,603 - octoprint.plugins.pluginmanager - INFO - Loaded notice data from disk, was still valid
2021-02-16 18:17:25,808 - octoprint.util.connectivity.connectivity_checker - INFO - Connectivity changed from offline to online
2021-02-16 18:17:25,833 - octoprint.plugins.pluginmanager - INFO - Loaded plugin repository data from disk, was still valid
2021-02-16 18:17:26,706 - octoprint.plugins.pluginmanager - INFO - Loaded notice data from disk, was still valid
2021-02-16 18:17:27,255 - octoprint.util.pip - INFO - Using "/home/pi/oprint/bin/python3 -m pip" as command to invoke pip
2021-02-16 18:17:27,257 - octoprint.util.pip - INFO - pip installs to /home/pi/oprint/lib/python3.7/site-packages (writable -> yes), --user flag needed -> no, virtual env -> yes
2021-02-16 18:17:27,258 - octoprint.util.pip - INFO - ==> pip ok -> yes
2021-02-16 18:17:27,324 - octoprint.plugins.softwareupdate - INFO - Saved version cache to disk
2021-02-16 18:17:27,334 - octoprint.plugins.bedlevelvisualizer - INFO - OctoPrint-BedLevelVisualizer loaded!
2021-02-16 18:17:27,334 - octoprint.plugins.dashboard - INFO - Dashboard started
2021-02-16 18:17:27,336 - octoprint.plugins.octoeverywhere - INFO - After startup called. Strating workder thread.
2021-02-16 18:17:27,338 - octoprint.plugins.octoeverywhere - INFO - Main thread starting
2021-02-16 18:17:27,339 - octoprint.plugins.prettygcode - INFO - Pretty GCode.
2021-02-16 18:17:27,514 - octoprint.plugins.octoeverywhere - INFO - Attempting to talk to OctoEverywhere, session 1, url wss://octoeverywhere.com/octoclientws
2021-02-16 18:17:27,532 - octoprint.server.preemptive_cache - INFO - Preemptively caching / (ui _default) for {'base_url': 'http://octopi.local/', 'path': '/', 'query_string': 'l10n=en'}
2021-02-16 18:17:27,805 - octoprint.plugins.octoeverywhere - INFO - Connected To Octo Everywhere, session 1. Starting handshake...
2021-02-16 18:17:27,867 - octoprint.plugins.octoeverywhere - INFO - Handshake complete, session 1, successfully connected to OctoEverywhere!
2021-02-16 18:17:27,924 - octoprint.plugins.tracking - INFO - Sent tracking event ping, payload: {'octoprint_uptime': 7}
2021-02-16 18:17:28,547 - octoprint.plugins.tracking - INFO - Sent tracking event pong, payload: {'version': '1.5.3', 'os': 'linux', 'bits': 32, 'python': '3.7.3', 'pip': '21.0.1', 'cores': 4, 'freq': 1500.0, 'ram': 3959975936, 'pi_model': 'Raspberry Pi 4 Model B Rev 1.2', 'octopi_version': '1.0.0', 'plugins': 'preheat:0.5.1,printtimegenius:2.2.7,prettygcode:1.2.4,fullscreen:0.0.6,dashboard:1.17.0,bltouch:0.3.4,octoeverywhere:0.6.2,displaylayerprogress:1.25.4,bedlevelvisualizer:1.0.0,bedlevelingwizard:0.2.4'}
2021-02-16 18:17:29,149 - octoprint.plugins.tracking - INFO - Sent tracking event startup, payload: {'version': '1.5.3', 'os': 'linux', 'bits': 32, 'python': '3.7.3', 'pip': '21.0.1', 'cores': 4, 'freq': 1500.0, 'ram': 3959975936, 'pi_model': 'Raspberry Pi 4 Model B Rev 1.2', 'octopi_version': '1.0.0'}
2021-02-16 18:17:35,557 - octoprint.server.preemptive_cache - INFO - ... done in 8.03s
2021-02-16 18:17:35,558 - octoprint.server.preemptive_cache - INFO - Preemptively caching / (ui _default) for {'base_url': 'http://192.168.86.52/', 'path': '/', 'query_string': 'l10n=en'}
2021-02-16 18:17:35,905 - octoprint.server.preemptive_cache - INFO - ... done in 0.35s
2021-02-16 18:19:46,025 - octoprint.server.util.flask - INFO - Passively logging in user trondsbr from ::ffff:192.168.86.32
2021-02-16 18:19:46,026 - octoprint.access.users - INFO - Logged in user: trondsbr
2021-02-16 18:19:47,099 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:192.168.86.32
2021-02-16 18:19:47,170 - octoprint.server.util.flask - INFO - Passively logging in user trondsbr from ::ffff:192.168.86.32
2021-02-16 18:19:47,170 - octoprint.access.users - INFO - Logged in user: trondsbr
2021-02-16 18:19:49,454 - octoprint.server.util.sockjs - INFO - User trondsbr logged in on the socket from client ::ffff:192.168.86.32
2021-02-16 18:19:53,716 - octoprint.server.api.system - INFO - Performing command for core:restart_safe: sudo service octoprint restart
2021-02-16 18:19:53,979 - octoprint.server - INFO - Shutting down...
2021-02-16 18:19:53,984 - octoprint.server.api.system - WARNING - Command for core:restart_safe failed with return code -15:
! STDOUT: 
! STDERR: 
2021-02-16 18:19:54,628 - octoprint.server - INFO - Calling on_shutdown on plugins
2021-02-16 18:19:54,631 - octoprint.events - INFO - Processing shutdown event, this will be our last event
2021-02-16 18:19:54,636 - octoprint.events - INFO - Event loop shut down
2021-02-16 18:19:55,777 - octoprint.plugins.tracking - INFO - Sent tracking event shutdown, payload: {}
2021-02-16 18:19:55,780 - octoprint.server - INFO - Goodbye!
2021-02-16 18:19:57,344 - octoprint.startup - INFO - ******************************************************************************
2021-02-16 18:19:57,346 - octoprint.startup - INFO - Starting OctoPrint 1.5.3
2021-02-16 18:19:57,347 - octoprint.startup - INFO - Starting in SAFE MODE. Third party plugins will be disabled!
2021-02-16 18:19:57,347 - octoprint.startup - INFO - Reason for safe mode: setting in config.yaml
2021-02-16 18:19:57,347 - octoprint.startup - INFO - ******************************************************************************
2021-02-16 18:19:57,946 - octoprint.util.connectivity.connectivity_checker - INFO - Connectivity changed from offline to online
2021-02-16 18:19:58,321 - octoprint.util.connectivity.connectivity_checker - INFO - Connectivity state is currently: online
2021-02-16 18:19:58,321 - octoprint.util.connectivity.connectivity_checker - INFO - Connecting to 8.8.8.8:53 is working
2021-02-16 18:19:58,321 - octoprint.util.connectivity.connectivity_checker - INFO - Resolving octoprint.org is working
2021-02-16 18:19:59,080 - octoprint.startup - INFO - Blacklist processing done, adding 12 blacklisted plugin versions: roomtemp (any), GcodeEditor (0.1.1), GcodeEditor (0.2.0), GcodeEditor (0.2.1), GcodeEditor (0.2.2), GcodeEditor (0.2.3), GcodeEditor (0.2.4), GcodeEditor (0.2.5), GcodeEditor (0.2.6), GcodeEditor (0.2.8), gcodeleveling (0.1.0), gcodeleveling (0.1.1)
2021-02-16 18:19:59,110 - octoprint.plugin.core - INFO - Loading plugins from /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins, /home/pi/.octoprint/plugins and installed plugin packages...
2021-02-16 18:19:59,803 - octoprint.plugin.core - INFO - Plugin OctoPrint-WideScreen (0.1.4) is disabled.
2021-02-16 18:19:59,835 - octoprint.plugin.core - INFO - Plugin MeatPack (1.5.21) is disabled.
2021-02-16 18:19:59,948 - octoprint.plugin.core - INFO - Plugin Octolapse (0.4.1) is disabled.
2021-02-16 18:20:00,113 - octoprint.plugins.errortracking - INFO - Initialized error tracking
2021-02-16 18:20:00,128 - octoprint.startup - INFO - Added settings overlay from plugin firmware_check
2021-02-16 18:20:00,129 - octoprint.plugin.core - INFO - Found 30 plugin(s) providing 17 mixin implementations, 34 hook handlers
2021-02-16 18:20:00,229 - octoprint.server.heartbeat - INFO - Starting server heartbeat, 900.0s interval
2021-02-16 18:20:00,235 - octoprint.server - INFO - Intermediary server started
2021-02-16 18:20:00,250 - octoprint.filemanager.storage - INFO - Initializing the file metadata for /home/pi/.octoprint/uploads...
2021-02-16 18:20:00,251 - octoprint.filemanager.storage - INFO - ... file metadata for /home/pi/.octoprint/uploads initialized successfully.
2021-02-16 18:20:00,253 - octoprint.server - INFO - Added new permission from plugin action_command_notification: PLUGIN_ACTION_COMMAND_NOTIFICATION_SHOW (needs: "Need(method='role', value='plugin_action_command_notification_show')")
2021-02-16 18:20:00,254 - octoprint.server - INFO - Added new permission from plugin action_command_notification: PLUGIN_ACTION_COMMAND_NOTIFICATION_CLEAR (needs: "Need(method='role', value='plugin_action_command_notification_clear')")
2021-02-16 18:20:00,254 - octoprint.server - INFO - Added new permission from plugin action_command_prompt: PLUGIN_ACTION_COMMAND_PROMPT_INTERACT (needs: "Need(method='role', value='plugin_action_command_prompt_interact')")
2021-02-16 18:20:00,255 - octoprint.server - INFO - Added new permission from plugin announcements: PLUGIN_ANNOUNCEMENTS_READ (needs: "Need(method='role', value='plugin_announcements_read')")
2021-02-16 18:20:00,255 - octoprint.server - INFO - Added new permission from plugin announcements: PLUGIN_ANNOUNCEMENTS_MANAGE (needs: "Need(method='role', value='plugin_announcements_read'), Need(method='role', value='plugin_announcements_manage')")
2021-02-16 18:20:00,255 - octoprint.server - INFO - Added new permission from plugin appkeys: PLUGIN_APPKEYS_ADMIN (needs: "Need(method='role', value='plugin_appkeys_admin')")
2021-02-16 18:20:00,256 - octoprint.server - INFO - Added new permission from plugin backup: PLUGIN_BACKUP_ACCESS (needs: "Need(method='role', value='plugin_backup_access')")
2021-02-16 18:20:00,256 - octoprint.server - INFO - Added new permission from plugin firmware_check: PLUGIN_FIRMWARE_CHECK_DISPLAY (needs: "Need(method='role', value='plugin_firmware_check_display')")
2021-02-16 18:20:00,256 - octoprint.server - INFO - Added new permission from plugin logging: PLUGIN_LOGGING_MANAGE (needs: "Need(method='role', value='plugin_logging_manage')")
2021-02-16 18:20:00,257 - octoprint.server - INFO - Added new permission from plugin pi_support: PLUGIN_PI_SUPPORT_STATUS (needs: "Need(method='role', value='plugin_pi_support_check')")
2021-02-16 18:20:00,257 - octoprint.server - INFO - Added new permission from plugin pluginmanager: PLUGIN_PLUGINMANAGER_MANAGE (needs: "Need(method='role', value='plugin_pluginmanager_manage')")
2021-02-16 18:20:00,258 - octoprint.server - INFO - Added new permission from plugin pluginmanager: PLUGIN_PLUGINMANAGER_INSTALL (needs: "Need(method='role', value='plugin_pluginmanager_install'), Need(method='role', value='plugin_pluginmanager_manage')")
2021-02-16 18:20:00,259 - octoprint.server - INFO - Added new permission from plugin softwareupdate: PLUGIN_SOFTWAREUPDATE_CHECK (needs: "Need(method='role', value='plugin_softwareupdate_check')")
2021-02-16 18:20:00,260 - octoprint.server - INFO - Added new permission from plugin softwareupdate: PLUGIN_SOFTWAREUPDATE_UPDATE (needs: "Need(method='role', value='plugin_softwareupdate_update')")
2021-02-16 18:20:00,261 - octoprint.server - INFO - Added new permission from plugin softwareupdate: PLUGIN_SOFTWAREUPDATE_CONFIGURE (needs: "Need(method='role', value='plugin_softwareupdate_configure')")
2021-02-16 18:20:00,431 - octoprint.plugins.softwareupdate - INFO - Loaded version cache from disk
2021-02-16 18:20:00,957 - octoprint.util.pip - INFO - Using "/home/pi/oprint/bin/python3 -m pip" as command to invoke pip
2021-02-16 18:20:01,479 - octoprint.util.pip - INFO - Version of pip is 21.0.1
2021-02-16 18:20:01,481 - octoprint.util.pip - INFO - pip installs to /home/pi/oprint/lib/python3.7/site-packages (writable -> yes), --user flag needed -> no, virtual env -> yes
2021-02-16 18:20:01,482 - octoprint.util.pip - INFO - ==> pip ok -> yes
2021-02-16 18:20:01,504 - octoprint.plugin.core - INFO - Initialized 17 plugin implementation(s)
2021-02-16 18:20:01,515 - octoprint.plugin.core - INFO - 30 plugin(s) registered with the system:
|  Action Command Notification Support (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/action_command_notification
|  Action Command Prompt Support (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/action_command_prompt
|  Announcement Plugin (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/announcements
|  Anonymous Usage Tracking (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/tracking
|  Application Keys Plugin (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/appkeys
|  Backup & Restore (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/backup
| !Bed Leveling Wizard (0.2.4) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_bedlevelingwizard
| !Bed Visualizer (1.0.0) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_bedlevelvisualizer
| !BLTouch Plugin (0.3.4) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_BLTouch
|  Core Wizard (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/corewizard
| !Dashboard (1.17.0) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_dashboard
|  Discovery (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/discovery
| !DisplayLayerProgress Plugin (1.25.4) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_DisplayLayerProgress
|  Error Tracking (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/errortracking
|  File Check (2020.8.7) (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_file_check
|  Firmware Check (2021.2.4) (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_firmware_check
| !Fullscreen Plugin (0.0.6) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_fullscreen
|  GCode Viewer (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/gcodeviewer
|  Logging (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/logging
| !MeatPack (1.5.21) = /home/pi/oprint/lib/python3.7/site-packages/OctoPrint_MeatPack
| !OctoEverywhere! (0.6.2) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_octoeverywhere
| !Octolapse (0.4.1) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_octolapse
| !OctoPrint-WideScreen (0.1.4) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_widescreen
|  Pi Support Plugin (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/pi_support
|  Plugin Manager (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/pluginmanager
| !Preheat Button (0.5.1) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_preheat
| !PrettyGCode (1.2.4) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_prettygcode
| !PrintTimeGenius Plugin (2.2.7) = /home/pi/oprint/lib/python3.7/site-packages/octoprint_PrintTimeGenius
|  Software Update (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/softwareupdate
|  Virtual Printer (bundled) = /home/pi/oprint/lib/python3.7/site-packages/octoprint/plugins/virtual_printer
Prefix legend: ! = disabled, # = blacklisted, * = incompatible
2021-02-16 18:20:01,542 - octoprint.environment - INFO - Detected environment is Python 3.7.3 under Linux (linux). Details:
|  hardware:
|      cores: 4
|      freq: 1500.0
|      ram: 3959975936
|  os:
|      bits: 32
|      id: linux
|      platform: linux
|  plugins:
|      pi_support:
|          model: Raspberry Pi 4 Model B Rev 1.2
|          octopi_version: 1.0.0
|          throttle_state: '0x0'
|  python:
|      pip: 21.0.1
|      version: 3.7.3
|      virtualenv: /home/pi/oprint
2021-02-16 18:20:01,557 - octoprint.server - INFO - Reset webasset folder /home/pi/.octoprint/generated/webassets...
2021-02-16 18:20:01,584 - octoprint.server - INFO - Reset webasset folder /home/pi/.octoprint/generated/.webassets-cache...
2021-02-16 18:20:01,969 - octoprint.server - INFO - Shutting down intermediary server...
2021-02-16 18:20:02,243 - octoprint.server - INFO - Intermediary server shut down
2021-02-16 18:20:02,244 - octoprint.events - INFO - Processing startup event, this is our first event
2021-02-16 18:20:02,245 - octoprint.events - INFO - Adding 2 events to queue that were held back before startup event
2021-02-16 18:20:02,245 - octoprint.filemanager - INFO - Adding backlog items from all storage types to analysis queue...
2021-02-16 18:20:02,247 - octoprint.server - INFO - Autoconnect on startup is configured, trying to connect to the printer...
2021-02-16 18:20:02,264 - octoprint.plugins.softwareupdate - INFO - Fetching check overlays from https://plugins.octoprint.org/update_check_overlay.json
2021-02-16 18:20:02,291 - octoprint.filemanager - INFO - Added 0 items from storage type "local" to analysis queue
2021-02-16 18:20:02,292 - octoprint.plugins.pluginmanager - INFO - Loaded plugin repository data from disk, was still valid
2021-02-16 18:20:03,002 - octoprint.plugins.tracking - INFO - Sent tracking event system_unthrottled, payload: {'throttled_now': False, 'throttled_past': False, 'throttled_mask': 0, 'throttled_voltage_now': False, 'throttled_voltage_past': False, 'throttled_overheat_now': False, 'throttled_overheat_past': False}
2021-02-16 18:20:03,005 - octoprint.server - INFO - Trying to connect to configured serial port /dev/ttyUSB0
2021-02-16 18:20:03,127 - octoprint.util.comm - INFO - Changing monitoring state from "Offline" to "Opening serial connection"
2021-02-16 18:20:03,128 - octoprint.util.comm - INFO - Connecting to port /dev/ttyUSB0, baudrate 115200
2021-02-16 18:20:03,222 - octoprint.server.util.watchdog - INFO - Running initial scan on watched folder...
2021-02-16 18:20:03,268 - octoprint.server.util.watchdog - INFO - ... initial scan done.
2021-02-16 18:20:03,318 - octoprint.util.comm - INFO - Changing monitoring state from "Opening serial connection" to "Connecting"
2021-02-16 18:20:03,322 - octoprint.util.comm - INFO - M110 detected, setting current line number to 0
2021-02-16 18:20:03,324 - octoprint.plugins.pluginmanager - INFO - Loaded notice data from disk, was still valid
2021-02-16 18:20:03,333 - octoprint.util.comm - INFO - M110 detected, setting current line number to 0
2021-02-16 18:20:03,335 - octoprint.util.comm - INFO - Changing monitoring state from "Connecting" to "Operational"
2021-02-16 18:20:03,347 - octoprint.util.comm - INFO - M110 detected, setting current line number to 0
2021-02-16 18:20:03,374 - octoprint.util.comm - INFO - Printer reports firmware name "Marlin bugfix-2.0.x (Feb 15 2021"
2021-02-16 18:20:03,375 - octoprint.plugins.firmware_check - INFO - Your printer's firmware is a development build. It might be more unstable than a release version and should be updated regularly.. More information at https://faq.octoprint.org/warning-firmware-development
2021-02-16 18:20:03,382 - octoprint.util.comm - INFO - Firmware states that it supports temperature autoreporting
2021-02-16 18:20:04,017 - octoprint.plugins.tracking - INFO - Sent tracking event printer_connected, payload: {'firmware_name': 'Marlin bugfix-2.0.x (Feb 15 2021', 'printer_port': '/dev/ttyUSB0', 'printer_baudrate': 115200}
2021-02-16 18:20:04,121 - octoprint.plugins.discovery - INFO - Registered 'OctoPrint instance "Ender 3 v2"._http._tcp.local.' for _http._tcp.local.
2021-02-16 18:20:04,550 - octoprint.util.pip - INFO - Using "/home/pi/oprint/bin/python3 -m pip" as command to invoke pip
2021-02-16 18:20:04,552 - octoprint.util.pip - INFO - pip installs to /home/pi/oprint/lib/python3.7/site-packages (writable -> yes), --user flag needed -> no, virtual env -> yes
2021-02-16 18:20:04,552 - octoprint.util.pip - INFO - ==> pip ok -> yes
2021-02-16 18:20:04,617 - octoprint.plugins.softwareupdate - INFO - Saved version cache to disk
2021-02-16 18:20:04,929 - octoprint.plugins.discovery - INFO - Registered 'OctoPrint instance "Ender 3 v2"._octoprint._tcp.local.' for _octoprint._tcp.local.
2021-02-16 18:20:04,934 - octoprint.plugins.discovery - INFO - Registered OctoPrint instance "Ender 3 v2" for SSDP
2021-02-16 18:20:04,955 - octoprint.server - INFO - Listening on http://127.0.0.1:5000
2021-02-16 18:20:04,956 - octoprint.server - INFO - Server started successfully in safe mode as requested from config, removing flag
2021-02-16 18:20:05,083 - octoprint.plugins.pluginmanager - INFO - Loaded plugin repository data from disk, was still valid
2021-02-16 18:20:05,625 - octoprint.util.pip - INFO - Using "/home/pi/oprint/bin/python3 -m pip" as command to invoke pip
2021-02-16 18:20:05,626 - octoprint.util.pip - INFO - pip installs to /home/pi/oprint/lib/python3.7/site-packages (writable -> yes), --user flag needed -> no, virtual env -> yes
2021-02-16 18:20:05,627 - octoprint.util.pip - INFO - ==> pip ok -> yes
2021-02-16 18:20:05,667 - octoprint.plugins.softwareupdate - INFO - Minimum free storage across all update relevant locations is 25.0GB. That is considered sufficient for updating.
2021-02-16 18:20:06,042 - octoprint.plugins.pluginmanager - INFO - Loaded notice data from disk, was still valid
2021-02-16 18:20:06,199 - octoprint.server.preemptive_cache - INFO - Preemptively caching / (ui _default) for {'base_url': 'http://octopi.local/', 'path': '/', 'query_string': 'l10n=en'}
2021-02-16 18:20:06,734 - octoprint.plugins.tracking - INFO - Sent tracking event ping, payload: {'octoprint_uptime': 6}
2021-02-16 18:20:07,386 - octoprint.plugins.tracking - INFO - Sent tracking event pong, payload: {'version': '1.5.3', 'os': 'linux', 'bits': 32, 'python': '3.7.3', 'pip': '21.0.1', 'cores': 4, 'freq': 1500.0, 'ram': 3959975936, 'pi_model': 'Raspberry Pi 4 Model B Rev 1.2', 'octopi_version': '1.0.0', 'plugins': ''}
2021-02-16 18:20:08,016 - octoprint.plugins.tracking - INFO - Sent tracking event startup, payload: {'version': '1.5.3', 'os': 'linux', 'bits': 32, 'python': '3.7.3', 'pip': '21.0.1', 'cores': 4, 'freq': 1500.0, 'ram': 3959975936, 'pi_model': 'Raspberry Pi 4 Model B Rev 1.2', 'octopi_version': '1.0.0'}
2021-02-16 18:20:11,414 - octoprint.server.preemptive_cache - INFO - ... done in 5.21s
2021-02-16 18:20:11,414 - octoprint.server.preemptive_cache - INFO - Preemptively caching / (ui _default) for {'base_url': 'http://192.168.86.52/', 'path': '/', 'query_string': 'l10n=en'}
2021-02-16 18:20:11,609 - octoprint.server.preemptive_cache - INFO - ... done in 0.19s
2021-02-16 18:20:24,223 - octoprint.server.util.flask - INFO - Passively logging in user trondsbr from ::ffff:192.168.86.32
2021-02-16 18:20:24,226 - octoprint.access.users - INFO - Logged in user: trondsbr
2021-02-16 18:20:25,010 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:192.168.86.32
2021-02-16 18:20:25,163 - octoprint.server.util.flask - INFO - Passively logging in user trondsbr from ::ffff:192.168.86.32
2021-02-16 18:20:25,163 - octoprint.access.users - INFO - Logged in user: trondsbr
2021-02-16 18:20:26,230 - octoprint.server.util.sockjs - INFO - User trondsbr logged in on the socket from client ::ffff:192.168.86.32
2021-02-16 18:22:39,513 - octoprint.server.util.flask - INFO - Passively logging in user trondsbr from ::ffff:192.168.86.32
2021-02-16 18:22:39,514 - octoprint.access.users - INFO - Logged in user: trondsbr
2021-02-16 18:22:39,621 - octoprint.server.util.sockjs - INFO - Client connection closed: ::ffff:192.168.86.32
2021-02-16 18:22:40,176 - octoprint.server.util.sockjs - INFO - New connection from client: ::ffff:192.168.86.32
2021-02-16 18:22:40,202 - octoprint.server.util.flask - INFO - Passively logging in user trondsbr from ::ffff:192.168.86.32
2021-02-16 18:22:40,203 - octoprint.access.users - INFO - Logged in user: trondsbr
2021-02-16 18:22:41,468 - octoprint.server.util.sockjs - INFO - User trondsbr logged in on the socket from client ::ffff:192.168.86.32

2021-02-16 18:20:03,102 - serial.log is currently not enabled, you can enable it via Settings > Serial Connection > Log communication to serial.log

Additional information about your setup

  • OctoPrint 1.5.3
  • Python 3.7.3
  • OctoPi 1.0.0
  • Ender 3 v2
  • Creality 4.2.7 board
  • Raspberry Pi 4B
  • Canakit 3.5A 5.1V Power Supply
  • Shielded USB printer to Pi cable, 2ft or 61cm
  • Windows 10 laptop and Windows 10 desktop

As you can see, I am running OctoPrint 1.5.3 with Python 3.7.3 and the nightly 32 bit OctoPi 1.0.0 which I've also had this same issue on 0.17 and 0.18. I tried 1.0 since the others were doing the same.

I am using OctoPrint to control an Ender 3 v2 driven by a Creality 4.2.7 board.

The Raspberry Pi 4Bis powered by a Canakit 3.5A 5.1V Power Supply, I've plugged it into another power supply of the same spec to ensure it wasn't a power issue.

The Pi is connected to the Ender 3 v2 using a Shielded USB printer to Pi cable, 2ft or 61cm

The PC I am using to log into OctoPrint is aWindows 10 laptop and Windows 10 desktop, both with the same results.

The Pi ic connected to a Google Mesh wifi system. The closest hub is 6 feet away. I am also using a Pi with raspberry pi os that has no connection issues connected to the same hub.

A loner descriptions of what takes place. I login to the WebUI and load print gcode. I start the print but the the start button doesn't response, so I click on the restart octoprint and receive the message 'The command "Restart OctoPrint" could not be executed.'. I then click refresh on the browser 'Chrome
Version 88.0.4324.150 (Official Build) (64-bit)' and the WebUI reloads. I can not start the print or control the Ender 3 v2. After approximately 10 seconds to 1 minute, the WebUI becomes unresponsive again and I need to refresh the browser. Only extensions on Chrome are Google Docs, AdBlock, and LastPass.

Hello @trondsbr !

Can you do other things, like moving around the printhead from the OctoPrint control panel?

No, I have not found a command that works once it becomes unresponsive. I have tried entering GCode into the terminal tab and that doesn't work either. I am not seeing errors in the terminal or in the logs indicating a loss of connection to the printer. I have clicked on disconnect to the printer but it doesn't disconnect.

Could you anyhow please share the complete serial.log after enabling it?
Preferably as file.

1 Like

Can you open the browser console? (F12) It sounds like unstable network connection to me, or the restart command is actually doing something and it gets a bit stuck.

1 Like

I wanted to report back that I have not had the issue not for over 24 hours.

I purchased a new Pi 4B and power supply and installed the current stable 0.18 with 1.5.3 update and everything has been operating smoothly.

I want to thank Ewald_Ikemann and Charlie_Powell for jumping in and attempting to assist me in resolving my issues.

2 Likes