Arch Linux

_pheinrich_

Member

Registered: 2014-05-26

Posts: 53

WOL setting with systemd

Hi,

I try to set the WOL flag every time my computer is started to be able starting it up with wol again.

executing

/usr/bin/ethtool -s enp2s1 wol g

sets the Wake-on flag to 'g'

ethtool enp2s1 | grep Wake-on
        Supports Wake-on: umbg
        Wake-on: g

shutting down the computer and booting up via

wol [mac]

is working

Now I need to set the Wake-on flag every time the computer comes up.
I have installed the wol-systemd package from aur because I am using NetworkManager on a headless system.

with

systemctrl start wol@enp2s1

the flag is set correctly

BUT

enabling the systemd file fails during startup with

Sep 07 20:56:15 ThinkX40 systemd[1]: Starting Wake-on-LAN for enp2s1...
Sep 07 20:56:15 ThinkX40 ethtool[232]: Cannot get current wake-on-lan settings: No such device
Sep 07 20:56:15 ThinkX40 ethtool[232]: not setting wol
Sep 07 20:56:15 ThinkX40 systemd[1]: Started Wake-on-LAN for enp2s1.

I think that the unit gets executed too early when the interface isn't up.

I tried several After= targets without luck.

[Unit]
Description=Wake-on-LAN for %i
Requires=network.target
Wants=network.target network-online.target
After=network.target network-online.target

[Service]
ExecStart=/usr/bin/ethtool -s %i wol g
Type=oneshot

[Install]
WantedBy=multi-user.target

Any ideas?

Last edited by _pheinrich_ (2015-09-07 19:04:25)

losko

Member

Registered: 2014-11-19

Posts: 42

Re: WOL setting with systemd

From the wiki:

/etc/systemd/system/wol@.service

[Unit]
Description=Wake-on-LAN for %i
Requires=network.target
After=network.target

[Service]
ExecStart=/usr/bin/ethtool -s %i wol g
Type=oneshot

[Install]
WantedBy=multi-user.target

Same as my homeserver, always worked for me...

I think that the unit gets executed too early when the interface isn't up

Maybe is waiting for network-online.target

Last edited by losko (2015-09-07 19:48:08)

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"Greetings from the Banana Republic"

R00KIE

Forum Fellow

From: Between a computer and a chair

Registered: 2008-09-14

Posts: 4,734

Re: WOL setting with systemd

Try 'man systemd.link'. I have never tried it myself but it should work.

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R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K

anatolik

Developer

Registered: 2012-09-27

Posts: 458

Re: WOL setting with systemd

If you use systemd-networkd for the link configuration then you can setup WOL using [Link] config option https://wiki.archlinux.org/index.php/Wa … th_systemd  Do not use third-party systemd services for WOL.

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