Ubuntu 11.04 Shutdown and Restart Problem with CIFS

UPDATE(07/29/2011): The GRUB thing didn’t work at all, back to basic trapping signal via upstart scripts in /etc/init/dbus.conf.  I tried it before using /etc/init/network-manager.conf but on Ubuntu 10.10, it’s not working anymore. Here’s another test and works for me.

1. Modify the current /etc/init/dbus.conf.

$> sudo vi /etc/init/dbus.conf

2. Add a pre-stop script, which looks like this:

pre-stop script
       trap "TERM signal" TERM
      /bin/umount -a -t cifs -l -f
      trap - TERM
end script 

3. Save the script and have a test.

4. Done.

UPDATE(07/28/2011): Found a better alternative via GRUB, link here. Mainly you just need to modify the  /etc/default/grub. Here’s the details:

1. Edit the /etc/default/grub

$> sudo vi /etc/default/grub

2. Add “reboot=pci” on the GRUB_CMDLINE_LINUX line, it should look something like this:

... GRUB_CMDLINE_LINUX="reboot=pci" ...

3. Update the grub

$> sudo update-grub

 

4. Done

—————

It’s an ancient bug (here), which still exist in Ubuntu 11.04, or even in other distros. When you got a mounted samba shares before the shutdown or restart process, the machine waits for around 10 minutes before it complete the operation. Very troublesome that’s why I tried various workaround but none of them  works with Ubuntu 11.04. Not even the /etc/rc6.d/K*  or the upstart /etc/init configurations, nor the old python script I posted before (here’s the link).

After few considerations, I made a desperate workaround, creating a script that triggers before the /sbin/shutdown, /sbin/reboot and /sbin/restart commands.

1. Rename the current shutdown, reboot and restart commands in /sbin.

#> mv /sbin/shutdown /sbin/shutdown2
#> mv /sbin/reboot /sbin/reboot2
#> mv /sbin/restart /sbin/restart2 

2. Then create scripts with names of the previous commands in /sbin, which contains the following:

#!/bin/sh
umount -t cifs -a -f -l
/sbin/shutdown2 $@
exit 0 

3. Make similar script for reboot and restart command which also points to /sbin/reboot2 and /sbin/restart2.

4.  Until the dbus implementation of stop on deconfiguring-networking comes to Ubuntu 11.04, which I think working with
Ubuntu 11.10 oneiric. I think this is the least workaround that works for me.

5. Done