[systemd-devel] Shutdown problems

[Nikolaus Rath]

Lennart Poettering <lennart at poettering.net> writes:
> On Sat, 08.11.14 11:16, Nikolaus Rath (Nikolaus at rath.org) wrote:
>
>> > Please boot with "systemd.log_level=debug", then make the machine hang
>> > and check what the last things in the logs say. Maybe then paste that
>> > somewhere online and post the URL for that here, so that we can have a
>> > look.
>> 
>> Here's the output (obtained by changing log level and remounting earlier
>> in the debug.sh script):
>> 
>> https://dl.dropboxusercontent.com/u/11545826/shutdown.log
>> 
>> Thanks for your help!
>
> Hmm the logs show that systemd pretty much completed its
> shutdown. After the message "Cannot finalize remaining DM devices,
> continuing." the only thing that still runs is the shutdown hooks you
> used to generate this log, plus either a jump back into your initrd
> (if your initrd supports that) or the reboot() system call. 
>
> If the latter hangs then it's a kernel bug.

reboot -f works fine - could it still be a kernel bug?

> Please check if there are any other scripts in
> /lib/systemd/system-shutdown/ that might be at fault here.

Nope, none.

> Please check if your initrd is one of those which support jumping back
> into the initrd on shutdown. For that check if /run/initramfs/shutdown
> exists during runtime and is executable.

No, /run/initramfs/shutdown does not exist.

> If so, it's probably an
> initrd problem, please file a bug against your initrd implementation.
>
> You appear to be using LVM, I wouldn't be surprised if LVM is broken
> here, but I cannot help you debugging this, please contact the LVM
> maintainers in this case.

Is there some indication that LVN is at fault? As I said in my first
email, the crucial difference seems to be if an X11 console is active or
not:

 * If I execute "systemctl reboot" while a text console is active,
   everything works fine.

 * If I execute "systemctl reboot" while the X11 console is active, the
   system hangs (I tried waiting up to 7 minutes). Furthermore, I am
   unable to switch to another console with Ctrl+Alt+Fn, the computer
   becomes unresponsive to the keyboard and the monitor powers down.

On which tty/pty systemctl itself is executed does not matter (I tested
this by running systemctl in an ssh session from a remote system), it
only matters which console is currently active.


Best,
-Nikolaus

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