Could you please attach the output of dmesg right after you get the error with ethtool? And I believe lspci would also be helpful for the kernel people.
** Changed in: ethtool (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Server, which is subscribed to ethtool in Ubuntu. https://bugs.launchpad.net/bugs/1780872 Title: wake on lan is not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ethtool/+bug/1780872/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs