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).

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https://bugs.launchpad.net/bugs/1937238

Title:
  systemd-time-wait-sync.service stuck in "activating" state after boot,
  blocks timers from starting

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