Comment 2 for bug 566736

I would love your suggestions for me I modified the /etc/init/networking.conf into:
# networking - configure virtual network devices
#
# This task causes virtual network devices that do not have an associated
# kernel object to be started on boot.

description "configure virtual network devices"

start on (local-filesystems
   and stopped udevtrigger)

task

pre-start exec mkdir -p /var/run/network

exec ifup -a
#modification starts here
post-start script
 initctl emit -n net-device-up
end script
#modification ends here

I'm on a virtual server (proxmox) which is running several Virtual ubuntu 10.04 server that's maybe one the net-device-up was never triggered?