Shut down times

Derek Broughton derek at
Mon Mar 30 16:14:44 UTC 2009

Amedee Van Gasse (Ubuntu) wrote:

> On Sun, March 29, 2009 13:33, Thorny wrote:
>> I don't understand the people's objection to clicking more than once, I
>> don't know from where they get their experience, you can't shut a Windows
>> box down without clicking more than once. That is, unless you use the
>> power switch and is isn't recommend there any more than it is here.
> Actually, the power switch on modern computers doesn't switch it off
> immediately. It gives a signal to the operating system to shut down. I
> think this is done with ACPI, but I'm not an expert in this matter.

You're right.

> Windows as well as Linux respond to this signal with a proper shutdown
> sequence. You can even configure that it doesn't shutdown, but goes to
> suspend or standby.
> Only when you press the power button longer than a couple of seconds, then
> you really cut the power like in the old days.
> All of this may of course be irrelevant for older computers that don't
> support ACPI.

There are probably very few computers left that don't support _that_ much of
ACPI. :-)

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