Dear Volumio users (of which I am one: recently my ancient Squeezebox gave up the ghost, and I chose Volumio as its replacement): perhaps this may be useful to you.
It has probably been posted by someone else in the past, but you never know.
(Note: my solution worked for an x86-64 Volumio box. I did not test it on other platforms.)
What is Wake On Lan (WOL)?
WOL is a feature of many mainboards that allows the machine to be turned on remotely by sending a so-called “magic packet” to its network card via the Ethernet port.
Why do I need WOL?
Because it lets you power up your Volumio box from another device (connected to the same network) without even having to move from your sofa (or armchair, or chair, or bed, or whatever).
So: because of laziness and because it’s nice to be able to do this kind of pseudo-magic things
What are the preconditions for WOL?
You need to have Volumio installed on a system that supports WOL (mosts motherboards do), and some time to spare.
Also, you need to turn on SSH access to your Volumio box, so you can tinker with system files (you will need to, a little bit).
How do I enable WOL?
This is the (mildly) tricky part. My starting point has been this link
In a nutshell, to enable WOL you need to do two things:
- enable WOL via BIOS (not always it’s on by default);
- fiddle with the software of the operating system
Unfortunately, the solution proposed by the document I linked above worked, but only until the machine was restarted. Then my WOL disappeared. In a word, it was not persistent.
However, I had enough information to look further into the issue. Annnd… I found a persistent, and pleasantly simple, solution.
In short: to get persistent activation of the WOL functionality you have to modify system file /etc/network/interfaces so that its contents are as follows. (Make a backup copy of the original first, so if you are not happy you can revert to that version.)
iface lo inet loopback
iface eth0 inet manual
post-up /sbin/ethtool -s eth0 wol g
iface wlan0 inet manual
Er, that’s it. On my Volumio box, after this change WOL works flawlessly.