[Beowulf] WOL on nforce4 mobo under linux?

Mattijs Janssens m.janssens at opencfd.co.uk
Thu May 18 00:45:06 PDT 2006

I had to change the /etc/init.d/halt script to end with

     echo '5' > /proc/acpi/sleep

just before the 'exec $command' (which normally does the halt). Anyway, 
bit of a hack but sends my machines to sleep where they can be woken up.

Just try above command from command line to see if your ethtool settings 
are correct & acpi is functional.

David Mathog wrote:
> Have any of you managed to get WOL working for an nforce4 mobo 
> running a recent linux kernel?
> On an A8N5X (nforce4, not ultra) motherboard WOL works fine if
> the machine shuts down from XP.  So the BIOS and hardware are
> clearly set up correctly.  However on "poweroff" from linux
> ( using the forcedeth driver) it won't wake up from
> a magic packet.  The ethernet card light stays on though, and
> it blinks as packets go by, so it should be able to respond to the packet.
> Things I've tried so far:
> 1.  ethtool -s eth0 wol g
>     ethtool eth0 (verifies that wake-on is set to g)
> 2.  modify /etc/rc.d/init.d/halt
>     remove the "-i" option off the final /sbin/halt call
> 3.  google, a lot
> 4.  tried to install the nvidia "nvnet" driver - except it
>     blew up when trying to build the driver.
>     This was the x86 version, not the 64 version.
>     Apparently nvnet doesn't get along with this
>     kernel version.
> The kernel starts with only: append="resume=/dev/hda3 splash=silent",
> acpi seems to be used (judging from the dmesg entries) and acpid is up.
> It did strike me as odd that in /proc/acpi/wakeup there
> seems not to be a device corresponding to the network card.
> I tried changing the settings of everything in there to "enable"
> and it didn't help, still a magic packet sent to the machine
> following a "poweroff" did not wake it.
> Any ideas?
> Thanks,
> David Mathog
> mathog at caltech.edu
> Manager, Sequence Analysis Facility, Biology Division, Caltech
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Mattijs Janssens

OpenCFD Ltd.
The Mews, Picketts Lodge,
Picketts Lane, Salfords,
Surrey RH1 5RG.
Tel: +44 (0)1293 821272
Email: M.Janssens at OpenCFD.co.uk
URL: http://www.OpenCFD.co.uk

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