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 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1010045 Title: 12.04 hangs on shutdown deconfiguring network interfaces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/1010045/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
