Need help debugging shutdown issues

[Michael Biebl]

Am 06.11.2014 um 07:39 schrieb Nikolaus Rath:
> Nikolaus Rath <Nikolaus-BTH8mxji4b0 at public.gmane.org> writes:
>> On 11/05/2014 02:51 AM, Michael Biebl wrote:
>>> Am 05.11.2014 um 03:35 schrieb Nikolaus Rath:
>>>> Hello,
>>>>
>>>> I'm using testing with systemd as pid 1, and my system does not shut
>>>> down (or reboot) properly.
>>>>
>>>> That's a lot better than not booting properly, but I'd nevertheless like
>>>> to fix it :-).
>>>>
>>>> I tried following the instructions at
>>>> http://freedesktop.org/wiki/Software/systemd/Debugging/#index2h1 and
>>>> found that
>>>>
>>>> sync && reboot -f
>>>> sync && poweroff -f
>>>>
>>>> work just fine. When rebooting or powering off with systemctl, however,
>>>> the system is still active after 10 minutes of waiting.
>>>>
>>>>
>>>> I then proceeded to add
>>>>
>>>> systemd.log_level=debug systemd.log_target=kmsg log_buf_len=1M
>>>> enforcing=0
>>>>
>>>> to the kernel command line and created the
>>>> /usr/lib/systemd/system-shutdown/debug.sh file. I noticed that the
>>>> system-shutdown directory did not exist - does that mean this method is
>>>> not applicable in Debian?
>>>>
>>>> In any case, I did not get the /shutdown-log.txt file after trying to
>>>> shutdown, so I activated the debug shell instead.
>>>>
>>>> On the debug shell, I ran
>>>>
>>>> systemctl reboot &
>>>> sleep 120
>>>> dmesg > dmesg.txt
>>>> systemctl status > systemctl-status.txt
>>>> systemctl list-units > systemctl-units.txt
>>>> systemctl list-jobs > systemctl-jobs.txt
>>>>
>>>> This gave me a huge amount of information (included below), but I don't
>>>> really know what to do with it. For example, is it a problem if
>>>> samba.service has status "stop running"? Or is the problem with
>>>
>>> This is most likely a samba bug and a duplicate of [1].
>>> I assume, you're not running samba 2:4.1.13+dfsg-2, which is supposed to
>>> fix that issue.
>>> Could you upgrade to that version and test again?
>>
>> I'm at 2:4.1.13+dfsg-2 now, problem is still the same unfortunately.
> 
> 
> Ok, this probably sounds weird, but I confirmed it several times:
> 
> - when I run "systemctl reboot/poweroff" on a console, it works
> - when I run "systemctl reboot/poweroff" on an X11 terminal, it
>   hangs
> 
> Additionally, when running "systemctl reboot" from X11 the system
> becomes unusable after a fraction of a second - the screen goes blank
> and I can't switch to a text console anymore either. I have tried to
> issue the command and then quickly switch, but this did not work either.
> 
> When I'm running "systemctl reboot" from a console, the system stays
> usable. I can see the status messages, switch to other consoles and use
> the debug shell. But this doesn't help much, because the system shuts
> down just fine.
> 
> 
> I have tried to start the following script in the debug shell *prior* to
> executing "systemctl reboot" in X11:
> 
> #!/bin/sh
> exec > shutdown.log
> while true; do
>   echo
>   echo
>   date
>   systemctl list-jobs
>   systemctl status
>   sync
>   sleep 10
> done
> 
> The last entry in shutdown.log is then:
> 
> Wed Nov  5 22:28:29 PST 2014
> JOB UNIT                                                           TYPE  STATE  
> 775 reboot.target                                                  start waiting
> 776 systemd-reboot.service                                         start waiting
> 777 shutdown.target                                                start waiting
> 782 local-fs.target                                                stop  waiting
> 783 systemd-remount-fs.service                                     stop  waiting
> 838 networking.service                                             stop  running

>              |-networking.service
>              | `-control
>              |   |-3416 /bin/sh -e /etc/init.d/networking stop
>              |   |-3427 ifdown -a --exclude=lo
>              |   |-3463 /bin/sh -c dhclient -v -r -pf /run/dhclient.br0.pid -lf /var/lib/dhcp/dhclient.br0.leases br0
>              |   `-3464 dhclient -v -r -pf /run/dhclient.br0.pid -lf /var/lib/dhcp/dhclient.br0.leases br0


Try running "systemctl stop networking.service" before you
shutdown/reboot. This service seems to be hanging in "ifdown -a".
Might be dhclient or ifdown.d hook script causing a dead lock.




-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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