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3

My first thought was to simply start broadcasting WOL magic packets over the network, but my Raspberry Pi is not waking up. So I'm assuming it either doesn't support WOL, or I haven't properly configured it.

What do I have to do to enable Wake-on-LAN?

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I wonder though, how on Earth did you manage to have power attached and not having your Pi turned on? – Tibor Jun 14 '12 at 16:23
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@Tibor: I only have an imaginary one, that's how. – Oliver Salzburg Jun 14 '12 at 18:10
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@OliverSalzburg: Then imagine it's waking up. – David Schwartz Jul 20 '12 at 23:00
a better way for the pi would be to wake up a pc then the pc does its thing after which the pi then turns of the pc thats magic – user961 Aug 2 '12 at 23:24
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While I wouldn't be suprised if the pi's operating consumption is comparable to many desktop's waiting-for-wake-on-lan consumption, it would be an interesting question if there is enough public information available about the SOC to do clock throttling and achieve a lower power idle state. – Chris Stratton Aug 3 '12 at 0:01

3 Answers

up vote 18 down vote accepted

It doesn't support WoL.

Considering the device draws so little power, the benefits of shutting it of and waking it with WoL are few and far between. Just leave it on!

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Rumour has it that the LAN chip does support WoL... – Alex Chamberlain Aug 3 '12 at 8:27
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@AlexChamberlain Yes, but once the OS is halted you can't get it back without rebooting. – Jivings♦ Aug 3 '12 at 9:37
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@Jivings Can you reboot using the WoL support in the LAN chip? – Alex Chamberlain Aug 3 '12 at 9:38
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Its not just the Pi, going to sleep also puts external HDDs to sleep which can mean significant power savings or simply prolong the life of HDD. – Mrchief Dec 29 '12 at 4:10
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Ok, so the new RaspBmc spins down external HDD after 20 minutes of inactivity - sweet! You can also configure the time period to anything like. So I guess WOL takes a back seat for now! :) – Mrchief Jan 1 at 4:16
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up vote 14 down vote

The RPi doesn't need Wake On Lan.

If it's connected to the power supply then it's on. There is no suspend or hibernation.

If it's not connected to the power supply, then it's definitely not going to turn on.

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What happens if you shutdown the OS? – Alex Chamberlain Aug 3 '12 at 8:28
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@AlexChamberlain It says "System Halted" and then you unplug it. – Jivings♦ Aug 3 '12 at 9:35
Let's go to chat... – Alex Chamberlain Aug 3 '12 at 9:37
@Jivings : how to boot after it has been halted ? – user1648 Sep 27 '12 at 8:32
@user1648: Unplug and plug back in. However the new firmware appears to allow the Pi to reboot itself. – Jivings♦ Sep 28 '12 at 5:55
up vote 13 down vote

I beg to differ. If you dig a bit deeper you find out the LAN micro chip, which incidentally is also the 2 port USB hub.

The manufacturer of the LAN microchip clearly says in their specifications the there is WoL on the LAN module.

Ethernet features: 10/100 Ethernet controller supports numerous power management wakeup features, including Magic Packet™, Wake-on LAN (WOL) and Link Status Change.

Now how you use it is another question. End of the day as long as there is power connected to Raspberry Pi (even if it off state or sleeping), you can use the WoL with out problem.

I know the other answers say you cannot shut down or sleep the Raspberry Pi (maybe with existing OS's), but the answer is still there is WoL in the LAN Module and that is a fact.

One thing to cry about if the fact that PoE has been omitted, but luckily Raspberrians questioned this fact and it turns out.. they just forgot about it.. oops.

Is power over Ethernet (PoE) possible?

Not in the base device, but it’s been a very commonly requested feature, so we’re examining options for later releases.

Somewhere on their blog they admitted to forgetting about it.. cannot find it now.

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Page 2 of the schematic. – Alex Chamberlain Aug 3 '12 at 8:26

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