shutdown is taking about 15 minutes "shutdown -r now" invoked on 2.6 kernel

[KRUPASINDHU PRADHAN]

Hi.
I issuesed below in order to shutdown 2.6 linux system.
/sbin/shutdown -c Cancelling current shutdown if exists"
/sbin/shutdown -r now

I don't know why would shutdown hang for about 15mins and then broadcast message came up and started shutting down.

Thanks

[oz]

Welcome to the forums!

I usually issue one of the following two commands for shutdown (halt) and shutdown (reboot):

shutdown -h now
shutdown -r now

...but neither of them ever hangs the system.

[KRUPASINDHU PRADHAN]

Hi OZ,
We even don't see this issue all the time. But sometime I find it hangs for about 15mins, and there is no logs written to /var/log/syslog. Not sure what else system log I could look at.

Thanks

[oz]

Maybe you could run top to see what processes are running, and then kill them one at a time, and then issue the shutdown command after each kill to see which process is hanging things up.

I really don't know of anything else to try.

[KRUPASINDHU PRADHAN]

Hey OZ,
Could you assist me how do I debug this issue. I want to know which processes are hung because of which shutdown -r now is hanging while shutting down. If I run top / ps command , I think shutdown will kill them. Any other good suggestion to track down which process are hung. Or How do I know "by strace on init/ shutdown pid" so that I can track which process shutdown/init is waiting on before shutting down the system

Need urgent reply
Thanks

[MikeTbob]

I think it may be related to APM and/or ACPI, you could modify your /boot/grub/menu.lst file to disable them.
just add this code to the kernel line of the above mentioned file:

acpi=off noapm noapic

it should look something like this, but yours will be different.

title Gentoo Linux
        root (hd0,0)
        kernel /boot/kernel-2.6.24-gentoo-r8 real_root=/dev/hda8 acpi=off noapm noapic

If it doesn't help, then you can change the file back and try something else.

[KRUPASINDHU PRADHAN]

Thanks
uname -a
Linux Node1 2.6.10-telco-1.45-mckinley-smp #1 SMP Tue Apr 1 23:16:59 UTC 2008 ia64 GNU/Linux
{MM-1}root@Node1:~# cat /boot/grub/menu.lst
cat: /boot/grub/menu.lst: No such file or directory

I don't have this file with me.
Is there any other configuration file for editing the same

[MikeTbob]

Uhhh, are you using Grub as a boot loader? Perhaps Lilo?
You could try /boot/grub/grub.conf
Make sure /boot is mounted or you will never find it.