My problem looks similar to the on reported in the Home Assistant bug tracker.
raek@mizar:~$ systemctl status systemd-time-wait-sync ... *SNIP* ... └─508 /lib/systemd/systemd-time-wait-sync raek@mizar:~$ sudo lsof -nPp 508 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME ... *SNIP* ... systemd-t 508 root 0r CHR 1,3 0t0 6 /dev/null systemd-t 508 root 1u unix 0xffff99d964ad0c00 0t0 16894 type=STREAM systemd-t 508 root 2u unix 0xffff99d964ad0c00 0t0 16894 type=STREAM systemd-t 508 root 3u a_inode 0,14 0 11428 [eventpoll] systemd-t 508 root 4u a_inode 0,14 0 11428 [signalfd] systemd-t 508 root 5r a_inode 0,14 0 11428 inotify systemd-t 508 root 6u a_inode 0,14 0 11428 [timerfd] raek@mizar:~$ sudo strace -ttTp 508 strace: Process 508 attached 22:59:52.923972 gettid() = 508 <0.000023> 22:59:52.925523 epoll_wait(3, raek@mizar:~$ sudo cat /proc/508/fdinfo/5 pos: 0 flags: 02004000 mnt_id: 15 inotify wd:1 ino:17b sdev:18 mask:100 ignored_mask:0 fhandle-bytes:8 fhandle-type:1 f_handle:ac95aa8d7b010000 raek@mizar:~$ sudo cat /proc/508/mountinfo | grep :15 39 34 0:33 / /sys/fs/cgroup/memory rw,nosuid,nodev,noexec,relatime shared:15 - cgroup cgroup rw,memory The mountinfo lines look different for me than for tmm1 (see previously linked home assistant ticket). -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1937238 Title: systemd-time-wait-sync.service stuck in "activating" state after boot, blocks timers from starting Status in systemd package in Ubuntu: Incomplete Bug description: When I start my server running Ubuntu 20.04 the systemd-time-wait- sync.service is stuck in "activating" state. I noticed this because none of the systemd timer units triggered, because all the timers depend on systemd-time-wait-sync.service. Running "systemctl restart systemd-time-wait-sync.service" manually works around the problem. Some logs and command outputs: raek@mizar:~$ lsb_release -rd Description: Ubuntu 20.04.2 LTS Release: 20.04 raek@mizar:~$ systemctl | grep systemd-time-wait-sync.service systemd-time-wait-sync.service loaded activating start start Wait Until Kernel Time Synchronized raek@mizar:~$ systemctl status systemd-time-wait-sync.service ● systemd-time-wait-sync.service - Wait Until Kernel Time Synchronized Loaded: loaded (/lib/systemd/system/systemd-time-wait-sync.service; enabled; vendor preset: enabled) Active: activating (start) since Thu 2021-07-22 11:06:52 CEST; 27min ago Docs: man:systemd-time-wait-sync.service(8) Main PID: 514 (systemd-time-wa) Tasks: 1 (limit: 9415) Memory: 972.0K CGroup: /system.slice/systemd-time-wait-sync.service └─514 /lib/systemd/systemd-time-wait-sync Jul 22 11:06:52 mizar systemd-time-wait-sync[514]: adjtime state 5 status 40 time Thu 2021-07-22 09:06:52.216338 UTC Warning: journal has been rotated since unit was started, output may be incomplete. raek@mizar:~$ journalctl -b -u systemd-time-wait-sync.service -- Logs begin at Wed 2020-07-08 16:34:13 CEST, end at Thu 2021-07-22 11:36:44 CEST. -- Jul 22 11:06:52 mizar systemd-time-wait-sync[514]: adjtime state 5 status 40 time Thu 2021-07-22 09:06:52.216338 UTC raek@mizar:~$ dpkg -S /lib/systemd/system/systemd-time-wait-sync.service systemd: /lib/systemd/system/systemd-time-wait-sync.service raek@mizar:~$ apt-cache policy systemd systemd: Installed: 245.4-4ubuntu3.11 Candidate: 245.4-4ubuntu3.11 Version table: *** 245.4-4ubuntu3.11 500 500 http://se.archive.ubuntu.com/ubuntu focal-security/main amd64 Packages 100 /var/lib/dpkg/status 245.4-4ubuntu3.10 500 500 http://se.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 245.4-4ubuntu3.8 400 400 http://archive.ubuntu.com/ubuntu focal-proposed/main amd64 Packages 245.4-4ubuntu3 500 500 http://se.archive.ubuntu.com/ubuntu focal/main amd64 Packages To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1937238/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp