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Enabling WOL (Wake on Lan) in Ubuntu 16.10

To enable WOL support, first restart your system and enter the EFI firmware (also called the EFI "BIOS" as a misnomer!). I'm running Asus systems at home, and quite honestly, their new EFI UIs are pretty slick.

In any case, head over to Advanced > APM. In this view, Power On By PCI-E/PCI should be set to enabled. Couple examples of this view are shown below

Now restart your system once more and boot into Ubuntu.

In a terminal run sudo ethtool <interface> where you can find the correct interface via ifconfig -a — obviously pick the one showing the correct IP. At the bottom, you want this output to show Wake-on: g since this indicates wake on Magic Packet is enabled.

mdesilva@skylake:~ sudo ethtool enp0s31f6
[sudo] password for mdesilva:
Settings for enp0s31f6:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Speed: 1000Mb/s
        Duplex: Full
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        MDI-X: on (auto)
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes

Add NETDOWN=no in /etc/default/halt to prevent powering off the network card during shutdown. That's it!

Since my development box is a Mac, I did brew install wakeonlan and setup a ZSH alias for wakeonlan <MAC Address> where the MAC address is that of your network card; it will be the same MAC address as the one shown earlier via ifconfig.

You can also confirm this by running ping -c3 <Target IP> && arp -a and compare the MAC address just to be sure.