[systemd-devel] Debugging systemd shutdown problem on openSuSE 12.3

[Kok, Auke-jan H]

On Mon, May 13, 2013 at 6:28 AM, Rainer Krienke <krienke at uni-koblenz.de> wrote:
> I i trouble on a openSuSE 12.3 system that is using autofs to mount
> users home directories and other shares. The system basically works fine.
>
> When I try to shut down or reboot the system sometimes this works, but
> most of the time the system terminates kdm and other processes (eg ssh
> access no longer works then) but it won't reboot or turn power off in
> case of shutdown.
>
> I added
> systemd.log_level=debug systemd.log_target=kmsg log_buf_len=1M
> systemd.sysv_console=1
> to the kernel command line and created a debug.sh file
>
> #!/bin/sh
> mount -o remount,rw /
> dmesg > /shutdown-log.txt
> mount -o remount,ro /
>
> in /usr/lib/systemd/system-shutdown. Once I found a /shutdown-log.txt
> log file but it did not contain any real hint for me why rebooting seems
> to hang.
>
> The problem is that I do not see what is hanging. How can I get better
> debugging results from systemd to find out more? Is it possible to
> redirect all steps systemd makes when rebooting to a virtual tty? What
> else could I do to get more information of what happens during
> reboot/shutdown?

I guess what we need is a similar mechanism that is used to display
messages when we're starting up and waiting for tasks, and have this
appear at shutdown for tasks taking a long time to shut down.

Auke