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Debugging slow shutdown in Jessie (systemd)

One of the issues listed on
<URL: https://wiki.debian.org/DebianEdu/Status/Jessie > is slow
shutdown.  Anyone remember which profiles are affected?  I just tested
an i386 Roaming workstation and it is not slow to shut down, but I
know I have seen it in the past, without paying attention to when it

Anyway, I asked on #debian-systemd about how to debug a slow/hanging
shutdown, and was told by Michael Biebl to check out

<URL: http://freedesktop.org/wiki/Software/systemd/Debugging >, add a

  /usr/lib/systemd/system-shutdown/debug.sh → /lib/systemd/system-shutdown/debug.sh

and enable debug logging and debug-shell.service.  During shutdown,
one can switch to tty9 and inspect the system during shutdown.

One can for example run 'systemctl list-jobs' to see the jobs systemd
currently waits for.

If you experience the slowdown/hang, please try to reproduce it and
see if you can figure what is going on.

He also mentioned a known 90 second wait, see
<URL: https://bugs.debian.org/759320 > for the details.  --

Happy hacking
Petter Reinholdtsen

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