thanks to the solution proposed by @Robbie Williamson I was able to start my ubuntu server by sending WOL packets
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/981461 Title: Network interfaces are not correctly brought down on halt, disrupting Wake-on-LAN To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ifupdown/+bug/981461/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
