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Re: wakeonlan




Am 19.04.2008 um 22:51 schrieb Paul Csanyi:

Andrei Popescu <andreimpopescu@gmail.com> writes:

On Sat, Apr 19, 2008 at 09:41:14PM +0200, Paul Csanyi wrote:

When I run the command wakeonlan the server box wan't not to wake up.

I never used wake-on-lan, but I see from the description of the
wakeonlan package that it used UDP packets in order to avoid the need
for root. Maybe you should also try etherwake?

Maybe I don't understand the description of wakeonlan:

"You can wake up WOL compliant Computers which have been powered down
 to sleep mode or start WOL compliant Computers with a BIOS feature."

Well, if I power down the server with "shutdown -t 1 -h now" then I
can't to wake it up with wakeonlan?

Have you tried suspending (hibernating) the system and then waking it
up? If I understand you correctly, you are trying to power up a system
that is not in suspend-to-disk or suspend-to-ram mode, but off.

I have never used a system with a NIC that actually has a special cable
for Wake-on LAN (my cheap NICs were always regular PCI ones without that
connection) and I haven't read the docs for wakeonlan, so I am not sure
if that makes a difference, but I always thought (and verified by
experiment for my hardware) that I needed to suspend the system for WOL
to work; starting a machine which had simply been powered off with the
shutdown command never worked. Again, maybe this is possible with certain
hardware, but it would certainly be special.

-Moritz


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