Shared access to Mac OS X: how to manage wakeonlan and sleep
ryandesign at macports.org
Mon Jul 6 18:22:05 PDT 2009
On Jul 6, 2009, at 17:47, Jean-Michel Pouré wrote:
> The Mac goes to sleep automatically after 3 hours of inactivity.
Then I assume you are either all on the same subnet as this Power Mac
and can therefore send it a wakeonlan signal yourself, or else you
have a device on the local subnet (perhaps a router running DD-WRT or
another machine that's always on) to which you first connect and tell
it to wake the Power Mac.
> My questions :
> * How can I manage sleep so that it is triggered after an SSH
> disconnection and let's say 30 minutes of inactivity.
> * When using screen, I would like to be sure that the Mac does not
> go to
I don't know a built-in way to accomplish either of those, but I'm
not familiar with what hooks might be available in the ssh or screen
programs to let you do this.
Personally whenever I want to sleep my machines I use small script
"sleepmac" I wrote which looks like this:
if [ ! -z "$1" ]; then
if [ -x $SLEEPWATCHER ]; then
osascript -e 'tell app "System Events" to sleep' &
You can specify a delay before sleeping, e.g. to sleep in one minute:
It uses the sleepwatcher port if installed, or AppleScript if not.
There was some set of circumstances that I cannot recall or test for
at the moment whereby sleep wouldn't work, complaining instead of an
inability to connect to the windowserver, and I believe it involved
being logged in via ssh and/or using screen. I think using
sleepwatcher instead of AppleScript may have helped with this, or at
least I was testing whether this helped. I have primarily been using
Tiger so I don't know if any of this has changed on Leopard.
sleepwatcher has many more capabilities that might be useful to you
if you wanted to write a script or scripts to help you manage the
requirements you mentioned.
> * Is sleep state safe?
It should be safe to put a machine to sleep in the middle of a
compile, and it should resume where it left off when you wake up. If
that's what you mean.
> I would like to know if some of you have innovating solutions. This is
> only a compilation platform. We also have VNC access to view the
> and verify that Kdenlive runs smoothly.
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