Failed to migrate controller cgroups

From	Michael Grant <mgrant@grant.org>
Newsgroups	linux.debian.user
Subject	Failed to migrate controller cgroups
Date	2021-01-06 11:30 +0100
Message-ID	<BueeJ-8eT-1@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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I sent this a few days ago but nobody responded.  Does anyone have any ideas how to fix this permission problem?

I'm seeing warnings like this in my logs:

Jan  3 04:48:49 bottom systemd[3436917]: -.slice: Failed to migrate controller cgroups from
+/user.slice/user-108.slice/user@108.service, ignoring: Permission denied
Jan  3 08:20:25 bottom systemd[1410]: -.slice: Failed to migrate controller cgroups from
+/user.slice/user-108.slice/user@108.service, ignoring: Permission denied
Jan  3 08:20:25 bottom systemd[1411]: -.slice: Failed to migrate controller cgroups from
+/user.slice/user-115.slice/user@115.service, ignoring: Permission denied
Jan  3 08:41:04 bottom systemd[6153]: -.slice: Failed to migrate controller cgroups from
+/user.slice/user-1001.slice/user@1001.service, ignoring: Permission denied

I did some googling around and someone recommended looking at the output of journalctl:

# journalctl -b --no-hostname -u user@1001.service
-- Journal begins at Sat 2020-10-17 13:43:00 EDT, ends at Sun 2021-01-03 08:41:16 EST. --
Jan 03 08:41:04 systemd[1]: Starting User Manager for UID 1001...
Jan 03 08:41:04 systemd[6153]: pam_unix(systemd-user:session): session opened for user strange by (uid=0)
Jan 03 08:41:04 systemd[6153]: Queued start job for default target Main User Target.
Jan 03 08:41:04 systemd[6153]: -.slice: Failed to migrate controller cgroups from
+/user.slice/user-1001.slice/user@1001.service, ignoring: Permission denied
Jan 03 08:41:04 systemd[6153]: Created slice User Application Slice.
Jan 03 08:41:04 systemd[6153]: Reached target Paths.
Jan 03 08:41:04 systemd[6153]: Reached target Timers.
Jan 03 08:41:04 systemd[6153]: Starting D-Bus User Message Bus Socket.
Jan 03 08:41:04 systemd[6153]: Listening on GnuPG network certificate management daemon.
Jan 03 08:41:04 systemd[6153]: Listening on GnuPG cryptographic agent and passphrase cache (access for web browsers).
Jan 03 08:41:04 systemd[6153]: Listening on GnuPG cryptographic agent and passphrase cache (restricted).
Jan 03 08:41:04 systemd[6153]: Listening on GnuPG cryptographic agent (ssh-agent emulation).
Jan 03 08:41:04 systemd[6153]: Listening on GnuPG cryptographic agent and passphrase cache.
Jan 03 08:41:04 systemd[6153]: Listening on D-Bus User Message Bus Socket.
Jan 03 08:41:04 systemd[6153]: Reached target Sockets.
Jan 03 08:41:04 systemd[6153]: Reached target Basic System.
Jan 03 08:41:04 systemd[6153]: Reached target Main User Target.
Jan 03 08:41:04 systemd[6153]: Startup finished in 119ms.
Jan 03 08:41:04 systemd[1]: Started User Manager for UID 1001.

But this isn't helpful in finding the problem.  Where else might I look to find out what is causing this permission error so that I can fix it?

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Thread

Failed to migrate controller cgroups Michael Grant <mgrant@grant.org> - 2021-01-06 11:30 +0100
  Re: Failed to migrate controller cgroups Thomas Pircher <thp.debian@p5r.uk> - 2021-01-06 11:50 +0100
    Re: Failed to migrate controller cgroups Michael Grant <mgrant@grant.org> - 2021-01-06 12:30 +0100
      Re: Failed to migrate controller cgroups Thomas Pircher <thp.debian@p5r.uk> - 2021-01-06 13:20 +0100
      Re: Failed to migrate controller cgroups Andrei POPESCU <andreimpopescu@gmail.com> - 2021-01-06 15:50 +0100
    Re: Failed to migrate controller cgroups Thomas Pircher <thp.debian@p5r.uk> - 2021-01-06 22:50 +0100

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