<div dir="ltr">Hi, Paul more information for reference. Looking forward to your new reply.Thank you! 1.We changed the default startup Timeout to 60s in /etc/systemd/system.conf. DefaultTimeoutStartSec=60s more system.conf information for reference. [Manager] #LogLevel=info #LogTarget=journal-or-kmsg #LogColor=yes #LogLocation=no #LogTime=no #DumpCore=yes #ShowStatus=yes #CrashChangeVT=no #CrashShell=no #CrashReboot=no #CtrlAltDelBurstAction=reboot-force #CPUAffinity= #NUMAPolicy=default #NUMAMask= #RuntimeWatchdogSec=off #RuntimeWatchdogPreSec=off #RuntimeWatchdogPreGovernor= #RebootWatchdogSec=10min #KExecWatchdogSec=off #WatchdogDevice= #CapabilityBoundingSet= #NoNewPrivileges=no #SystemCallArchitectures= #TimerSlackNSec= #StatusUnitFormat=combined #DefaultTimerAccuracySec=1min #DefaultStandardOutput=journal #DefaultStandardError=inherit DefaultTimeoutStartSec=60s #DefaultTimeoutStopSec=90s #DefaultTimeoutAbortSec= #DefaultDeviceTimeoutSec=90s #DefaultRestartSec=100ms #DefaultStartLimitIntervalSec=10s #DefaultStartLimitBurst=5 #DefaultEnvironment= #DefaultCPUAccounting=yes #DefaultIOAccounting=no #DefaultIPAccounting=no #DefaultMemoryAccounting=yes #DefaultTasksAccounting=yes #DefaultTasksMax=15% #DefaultLimitCPU= #DefaultLimitFSIZE= #DefaultLimitDATA= #DefaultLimitSTACK= #DefaultLimitCORE= #DefaultLimitRSS= #DefaultLimitNOFILE=1024:524288 #DefaultLimitAS= #DefaultLimitNPROC= #DefaultLimitMEMLOCK=8M #DefaultLimitLOCKS= #DefaultLimitSIGPENDING= #DefaultLimitMSGQUEUE= #DefaultLimitNICE= #DefaultLimitRTPRIO= #DefaultLimitRTTIME= #DefaultMemoryPressureThresholdSec=200ms #DefaultMemoryPressureWatch=auto #DefaultOOMPolicy=stop #DefaultSmackProcessLabel= #ReloadLimitIntervalSec= #ReloadLimitBurst= 2. From the serial port log, the time jump occurred at [2025-05-09 10:38:33.325848] [2025-05-09 10:38:33.325848] [ [0;32m OK [0m] Finished [0;1;39msystemd-sysctl.service [0m. // Here is the issue,no more logs output. [2025-05-09 10:40:02.693116] Starting [0;1;39msystemd-resolved.service [0m... more logs for reference. [2025-05-09 10:38:32.350945] oem-config setup has already been successfully completed [2025-05-09 10:38:32.382031] [ [0;32m OK [0m] Created slice [0;1;39msystem-getty.slice [0m. [2025-05-09 10:38:32.383543] [ [0;32m OK [0m] Created slice [0;1;39msystem-modprobe.slice [0m. [2025-05-09 10:38:32.400835] [ [0;32m OK [0m] Created slice [0;1;39msystem-serial\x2dgetty.slice [0m. [2025-05-09 10:38:32.414724] [ [0;32m OK [0m] Created slice [0;1;39muser.slice [0m. [2025-05-09 10:38:32.415990] [ [0;32m OK [0m] Started [0;1;39msystemd-ask-password-console.path [0m. [2025-05-09 10:38:32.416951] [ [0;32m OK [0m] Started [0;1;39msystemd-ask-password-wall.path [0m. [2025-05-09 10:38:32.430862] [ [0;32m OK [0m] Set up automount [0;1;39mproc-sys-fs-binfmt_misc.automount [0m. [2025-05-09 10:38:32.432453] Expecting device [0;1;39mdev-tegra_hv_pm_ctl.device [0m... [2025-05-09 10:38:32.446737] Expecting device [0;1;39mdev-ttyUTC0.device [0m... [2025-05-09 10:38:32.447717] [ [0;32m OK [0m] Reached target [0;1;39mcryptsetup.target [0m. [2025-05-09 10:38:32.448909] [ [0;32m OK [0m] Reached target [0;1;39mintegritysetup.target [0m. [2025-05-09 10:38:32.464302] [ [0;32m OK [0m] Reached target [0;1;39mpaths.target [0m. [2025-05-09 10:38:32.465641] [ [0;32m OK [0m] Reached target [0;1;39mslices.target [0m. [2025-05-09 10:38:32.479145] [ [0;32m OK [0m] Reached target [0;1;39mswap.target [0m. [2025-05-09 10:38:32.480320] [ [0;32m OK [0m] Reached target [0;1;39mtime-set.target [0m. [2025-05-09 10:38:32.494210] [ [0;32m OK [0m] Reached target [0;1;39mveritysetup.target [0m. [2025-05-09 10:38:32.495803] [ [0;32m OK [0m] Listening on [0;1;39mrpcbind.socket [0m. [2025-05-09 10:38:32.497627] [ [0;32m OK [0m] Listening on [0;1;39msyslog.socket [0m. [2025-05-09 10:38:32.510369] [ [0;32m OK [0m] Listening on [0;1;39msystemd-initctl.socket [0m. [2025-05-09 10:38:32.511771] [ [0;32m OK [0m] Listening on [0;1;39msystemd-journald-dev-log.socket [0m. [2025-05-09 10:38:32.513002] [ [0;32m OK [0m] Listening on [0;1;39msystemd-journald.socket [0m. [2025-05-09 10:38:32.526432] [ [0;32m OK [0m] Listening on [0;1;39msystemd-networkd.socket [0m. [2025-05-09 10:38:32.526937] [ [0;32m OK [0m] Listening on [0;1;39msystemd-udevd-control.socket [0m. [2025-05-09 10:38:32.542763] [ [0;32m OK [0m] Listening on [0;1;39msystemd-udevd-kernel.socket [0m. [2025-05-09 10:38:32.543647] Mounting [0;1;39mdev-hugepages.mount [0m... [2025-05-09 10:38:32.544342] Mounting [0;1;39mdev-mqueue.mount [0m... [2025-05-09 10:38:32.558008] Mounting [0;1;39msys-kernel-debug.mount [0m... [2025-05-09 10:38:32.558631] Mounting [0;1;39msys-kernel-tracing.mount [0m... [2025-05-09 10:38:32.559014] Starting [0;1;39mkmod-static-nodes.service [0m... [2025-05-09 10:38:32.574281] Starting [0;1;39mmodprobe@configfs.service [0m... [2025-05-09 10:38:32.574994] Starting [0;1;39mmodprobe@dm_mod.service [0m... [2025-05-09 10:38:32.575620] Starting [0;1;39mmodprobe@drm.service [0m... [2025-05-09 10:38:32.591030] Starting [0;1;39mmodprobe@efi_pstore.service [0m... [2025-05-09 10:38:32.591795] Starting [0;1;39mmodprobe@fuse.service [0m... [2025-05-09 10:38:32.593200] Starting [0;1;39mmodprobe@loop.service [0m... [2025-05-09 10:38:32.606240] Starting [0;1;39msystemd-modules-load.service [0m... [2025-05-09 10:38:32.607147] Starting [0;1;39msystemd-remount-fs.service [0m... [2025-05-09 10:38:32.607995] Starting [0;1;39msystemd-udev-trigger.service [0m... [2025-05-09 10:38:32.623071] [ [0;32m OK [0m] Mounted [0;1;39mdev-hugepages.mount [0m. [2025-05-09 10:38:32.624229] [ [0;32m OK [0m] Mounted [0;1;39mdev-mqueue.mount [0m. [2025-05-09 10:38:32.625780] [ [0;32m OK [0m] Mounted [0;1;39msys-kernel-debug.mount [0m. [2025-05-09 10:38:32.638671] [ [0;32m OK [0m] Mounted [0;1;39msys-kernel-tracing.mount [0m. [2025-05-09 10:38:32.639655] [ [0;32m OK [0m] Finished [0;1;39mkmod-static-nodes.service [0m. [2025-05-09 10:38:32.654140] [ [0;32m OK [0m] Finished [0;1;39mmodprobe@configfs.service [0m. [2025-05-09 10:38:32.655989] [ [0;32m OK [0m] Finished [0;1;39mmodprobe@dm_mod.service [0m. [2025-05-09 10:38:32.657256] [ [0;32m OK [0m] Finished [0;1;39mmodprobe@drm.service [0m. [2025-05-09 10:38:32.670735] [ [0;32m OK [0m] Finished [0;1;39mmodprobe@efi_pstore.service [0m. [2025-05-09 10:38:32.673000] [ [0;32m OK [0m] Finished [0;1;39mmodprobe@fuse.service [0m. [2025-05-09 10:38:32.674100] [ [0;32m OK [0m] Finished [0;1;39mmodprobe@loop.service [0m. [2025-05-09 10:38:32.690802] [ [0;32m OK [0m] Finished [0;1;39msystemd-remount-fs.service [0m. [2025-05-09 10:38:32.692796] Mounting [0;1;39msys-fs-fuse-connections.mount [0m... [2025-05-09 10:38:32.702262] Mounting [0;1;39msys-kernel-config.mount [0m... [2025-05-09 10:38:32.703737] Starting [0;1;39msystemd-random-seed.service [0m... [2025-05-09 10:38:32.705370] Starting [0;1;39msystemd-tmpfiles-setup-dev-early.service [0m... [2025-05-09 10:38:32.719696] [ [0;32m OK [0m] Mounted [0;1;39msys-fs-fuse-connections.mount [0m. [2025-05-09 10:38:32.722370] [ [0;32m OK [0m] Mounted [0;1;39msys-kernel-config.mount [0m. [2025-05-09 10:38:32.724814] [ [0;32m OK [0m] Finished [0;1;39msystemd-random-seed.service [0m. [2025-05-09 10:38:32.735303] Starting [0;1;39mmodprobe@dm_mod.service [0m... [2025-05-09 10:38:32.736278] Starting [0;1;39mmodprobe@efi_pstore.service [0m... [2025-05-09 10:38:32.739990] Starting [0;1;39mmodprobe@loop.service [0m... [2025-05-09 10:38:32.750934] [ [0;32m OK [0m] Finished [0;1;39mmodprobe@dm_mod.service [0m. [2025-05-09 10:38:32.752393] [ [0;32m OK [0m] Finished [0;1;39mmodprobe@efi_pstore.service [0m. [2025-05-09 10:38:32.766126] [ [0;32m OK [0m] Finished [0;1;39mmodprobe@loop.service [0m. [2025-05-09 10:38:32.767311] [ [0;32m OK [0m] Finished [0;1;39msystemd-tmpfiles-setup-dev-early.service [0m. [2025-05-09 10:38:32.783233] Starting [0;1;39msystemd-tmpfiles-setup-dev.service [0m... [2025-05-09 10:38:32.786457] [ [0;32m OK [0m] Reached target [0;1;39mtime-sync.target [0m. [2025-05-09 10:38:32.799052] Starting [0;1;39msystemd-journald.service [0m... [2025-05-09 10:38:32.799957] [ [0;32m OK [0m] Started [0;1;39msystemd-journald.service [0m. [2025-05-09 10:38:32.813973] Starting [0;1;39msystemd-journal-flush.service [0m... [2025-05-09 10:38:32.815059] [ [0;32m OK [0m] Finished [0;1;39msystemd-udev-trigger.service [0m. [2025-05-09 10:38:32.816318] [ [0;32m OK [0m] Finished [0;1;39msystemd-tmpfiles-setup-dev.service [0m. [2025-05-09 10:38:32.830379] [ [0;32m OK [0m] Reached target [0;1;39mlocal-fs-pre.target [0m. [2025-05-09 10:38:32.832103] [ [0;32m OK [0m] Reached target [0;1;39mlocal-fs.target [0m. [2025-05-09 10:38:32.834105] [ [0;32m OK [0m] Listening on [0;1;39msystemd-sysext.socket [0m. [2025-05-09 10:38:32.847003] Starting [0;1;39msystemd-binfmt.service [0m... [2025-05-09 10:38:32.848522] Starting [0;1;39msystemd-udevd.service [0m... [2025-05-09 10:38:32.862854] Mounting [0;1;39mproc-sys-fs-binfmt_misc.mount [0m... [2025-05-09 10:38:32.863965] [ [0;32m OK [0m] Mounted [0;1;39mproc-sys-fs-binfmt_misc.mount [0m. [2025-05-09 10:38:32.878898] [ [0;32m OK [0m] Finished [0;1;39msystemd-binfmt.service [0m. [2025-05-09 10:38:32.879833] [ [0;32m OK [0m] Finished [0;1;39msystemd-journal-flush.service [0m. [2025-05-09 10:38:32.894091] Starting [0;1;39msystemd-tmpfiles-setup.service [0m... [2025-05-09 10:38:32.895352] [ [0;32m OK [0m] Started [0;1;39msystemd-udevd.service [0m. [2025-05-09 10:38:33.022039] [ [0;32m OK [0m] Finished [0;1;39msystemd-modules-load.service [0m. [2025-05-09 10:38:33.039129] [ [0;32m OK [0m] Finished [0;1;39msystemd-tmpfiles-setup.service [0m. [2025-05-09 10:38:33.165964] [ [0;32m OK [0m] Found device [0;1;39mdev-ttyUTC0.device [0m. [2025-05-09 10:38:33.229922] Mounting [0;1;39mrun-rpc_pipefs.mount [0m... [2025-05-09 10:38:33.246783] Starting [0;1;39mrpcbind.service [0m... [2025-05-09 10:38:33.247943] Starting [0;1;39msystemd-sysctl.service [0m... [2025-05-09 10:38:33.249473] Starting [0;1;39msystemd-update-utmp.service [0m... [2025-05-09 10:38:33.262237] [ [0;32m OK [0m] Mounted [0;1;39mrun-rpc_pipefs.mount [0m. [2025-05-09 10:38:33.263251] [ [0;32m OK [0m] Found device [0;1;39mdev-tegra_hv_pm_ctl.device [0m. [2025-05-09 10:38:33.265105] [ [0;32m OK [0m] Started [0;1;39mrpcbind.service [0m. [2025-05-09 10:38:33.278968] [ [0;32m OK [0m] Reached target [0;1;39mrpc_pipefs.target [0m. [2025-05-09 10:38:33.280378] [ [0;32m OK [0m] Reached target [0;1;39mrpcbind.target [0m. [2025-05-09 10:38:33.293863] [ [0;32m OK [0m] Reached target [0;1;39mnfs-client.target [0m. [2025-05-09 10:38:33.294915] [ [0;32m OK [0m] Reached target [0;1;39mremote-fs-pre.target [0m. [2025-05-09 10:38:33.296171] [ [0;32m OK [0m] Reached target [0;1;39mremote-fs.target [0m. [2025-05-09 10:38:33.310669] [ [0;32m OK [0m] Finished [0;1;39msystemd-update-utmp.service [0m. [2025-05-09 10:38:33.325848] [ [0;32m OK [0m] Finished [0;1;39msystemd-sysctl.service [0m. // Here is the issue. [2025-05-09 10:40:02.693116] Starting [0;1;39msystemd-resolved.service [0m... [2025-05-09 10:40:03.093112] [ [0;32m OK [0m] Started [0;1;39msystemd-resolved.service [0m. [2025-05-09 10:40:03.094834] [ [0;32m OK [0m] Reached target [0;1;39mnss-lookup.target [0m. [2025-05-09 10:40:03.110386] [ [0;32m OK [0m] Reached target [0;1;39msysinit.target [0m. [2025-05-09 10:40:03.111699] [ [0;32m OK [0m] Started [0;1;39mdpkg-db-backup.timer [0m. [2025-05-09 10:40:03.125272] [ [0;32m OK [0m] Started [0;1;39me2scrub_all.timer [0m. [2025-05-09 10:40:03.126731] [ [0;32m OK [0m] Started [0;1;39mfstrim.timer [0m. [2025-05-09 10:40:03.127872] [ [0;32m OK [0m] Started [0;1;39mlogrotate.timer [0m. [2025-05-09 10:40:03.141129] [ [0;32m OK [0m] Started [0;1;39mmotd-news.timer [0m. [2025-05-09 10:40:03.142378] [ [0;32m OK [0m] Started [0;1;39msystemd-tmpfiles-clean.timer [0m. [2025-05-09 10:40:03.144127] [ [0;32m OK [0m] Started [0;1;39mxm_logrotate.timer [0m. [2025-05-09 10:40:03.157836] [ [0;32m OK [0m] Reached target [0;1;39mtimers.target [0m. [2025-05-09 10:40:03.159283] [ [0;32m OK [0m] Listening on [0;1;39mdbus.socket [0m. [2025-05-09 10:40:03.160640] [ [0;32m OK [0m] Listening on [0;1;39mssh.socket [0m. [2025-05-09 10:40:03.173272] [ [0;32m OK [0m] Reached target [0;1;39msockets.target [0m. [2025-05-09 10:40:03.174836] [ [0;32m OK [0m] Reached target [0;1;39mbasic.target [0m. [2025-05-09 10:40:03.176052] Starting [0;1;39mdbus.service [0m... [2025-05-09 10:40:03.189270] Starting [0;1;39mdisable_power_features_linux.service [0m... [2025-05-09 10:40:03.190659] [ [0;32m OK [0m] Started [0;1;39mdmesg.service [0m. [2025-05-09 10:40:03.191302] Starting [0;1;39me2scrub_reap.service [0m... <div> </div><div>Best regards, Alien Kong</div></div> <div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">Alien Kong <<a href="mailto:kqleno@gmail.com">kqleno@gmail.com</a>> 于2025年5月10日周六 22:55写道： </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Hi, Paul Thank you for your reply. This is a low-probability, sporadic problem. Currently, there is no `journalctl -b` information with `debug` on the command line. The unit information of the two services is as follows: 1. systemctl cat systemd-resolved # /usr/lib/systemd/system/systemd-resolved.service # SPDX-License-Identifier: LGPL-2.1-or-later # # This file is part of systemd. # # systemd is free software; you can redistribute it and/or modify it # under the terms of the GNU Lesser General Public License as published by # the Free Software Foundation; either version 2.1 of the License, or # (at your option) any later version. [Unit] Description=Network Name Resolution Documentation=man:systemd-resolved.service(8) Documentation=man:org.freedesktop.resolve1(5) Documentation=<a href="https://www.freedesktop.org/wiki/Software/systemd/writing-network-configuration-managers" target="_blank">https://www.freedesktop.org/wiki/Software/systemd/writing-network-configuration-managers</a> Documentation=<a href="https://www.freedesktop.org/wiki/Software/systemd/writing-resolver-clients" target="_blank">https://www.freedesktop.org/wiki/Software/systemd/writing-resolver-clients</a> DefaultDependencies=no After=systemd-sysctl.service systemd-sysusers.service Before=sysinit.target network.target nss-lookup.target shutdown.target initrd-switch-root.target Conflicts=shutdown.target initrd-switch-root.target Wants=nss-lookup.target [Service] AmbientCapabilities=CAP_SETPCAP CAP_NET_RAW CAP_NET_BIND_SERVICE BusName=org.freedesktop.resolve1 CapabilityBoundingSet=CAP_SETPCAP CAP_NET_RAW CAP_NET_BIND_SERVICE ExecStart=!!/usr/lib/systemd/systemd-resolved LockPersonality=yes MemoryDenyWriteExecute=yes NoNewPrivileges=yes PrivateDevices=yes PrivateTmp=yes ProtectClock=yes ProtectControlGroups=yes ProtectHome=yes ProtectKernelLogs=yes ProtectKernelModules=yes ProtectKernelTunables=yes ProtectSystem=strict Restart=always RestartSec=0 RestrictAddressFamilies=AF_UNIX AF_NETLINK AF_INET AF_INET6 RestrictNamespaces=yes RestrictRealtime=yes RestrictSUIDSGID=yes RuntimeDirectory=systemd/resolve RuntimeDirectoryPreserve=yes SystemCallArchitectures=native SystemCallErrorNumber=EPERM SystemCallFilter=@system-service Type=notify User=systemd-resolve ImportCredential=network.dns ImportCredential=network.search_domains WatchdogSec=3min [Install] WantedBy=sysinit.target Alias=dbus-org.freedesktop.resolve1.service 2. systemctl cat systemd-sysctl.service # /usr/lib/systemd/system/systemd-sysctl.service # SPDX-License-Identifier: LGPL-2.1-or-later # # This file is part of systemd. # # systemd is free software; you can redistribute it and/or modify it # under the terms of the GNU Lesser General Public License as published by # the Free Software Foundation; either version 2.1 of the License, or # (at your option) any later version. [Unit] Description=Apply Kernel Variables Documentation=man:systemd-sysctl.service(8) man:sysctl.d(5) DefaultDependencies=no Conflicts=shutdown.target After=systemd-modules-load.service Before=sysinit.target shutdown.target ConditionPathIsReadWrite=/proc/sys/net/ [Service] Type=oneshot RemainAfterExit=yes ExecStart=/usr/lib/systemd/systemd-sysctl TimeoutSec=90s ImportCredential=sysctl.*</div><div> </div>Best regards, Alien Kong</div> </blockquote></div>