[Bug 1010045] Re: 12.04 hangs on shutdown deconfiguring network interfaces

[Andreas van der Locht]

Hi,

this problem could be reproduced although on a physical machine with
12.04.1 LTS and Kernel 3.2.0 ....

At the attached screenshot you ca seen the kernel panic message when stopping the open-iscsi deamon.
It's the same for a reboot or a networking stop/restart.

After installation of the Kernel 3.4 from
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.4-precise/linux-image-3.4.0-030400-generic_3.4.0-030400.201205210521_amd64.deb
the system has no problem with rebooting anymore.
This has been tested in a KVM-Environment and a physical machine.

I hope this c,ould be a solution for some installations.
In some cases (production) you should wait for the official 3.4-Kernel-Support in Ubuntu 12.04

** Attachment added: "Screenshot from stopping iscsi"
   https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/1010045/+attachment/3419802/+files/iscsi-stop.jpg

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https://bugs.launchpad.net/bugs/1010045

Title:
  12.04 hangs on shutdown deconfiguring network interfaces

Status in “ifupdown” package in Ubuntu:
  Incomplete

Bug description:
  When shutting down the 12.04 guest, it hangs on "Deconfiguring network
  interfaces...", when there are multiple networkcards.

  The system is going down for halt NOW!
   * Stopping web server apache2                                           [ OK ]  ... waiting 
   * Stopping Bacula File daemon...                                        [ OK ] 
  Checking for running unattended-upgrades: 
   * Running nssldap-update-ignoreusers...                                 [ OK ] 
   * Stopping Name Service Cache Daemon nscd                               [ OK ] 
   * Stopping Postfix Mail Transport Agent postfix                         [ OK ] 
   * Stopping ftp server proftpd                                           [ OK ] 
   * Asking all remaining processes to terminate...                        [ OK ] 
   * All processes ended within 2 seconds....                              [ OK ] 
  rpcbind: rpcbind terminating on signal. Restart with "rpcbind -w"
   * Deconfiguring network interfaces...                                          

  <hang>

  We only have this issue when a vm has multiple network cards assigned.
  When we do a manual "/etc/init.d/network stop; halt", the vm shuts down like expected.

  dpkg -l | grep ifupdown
  ii  ifupdown                         0.7~beta2ubuntu8              high level tools to configure network interfaces

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