Shut down times

Amedee Van Gasse (Ubuntu) amedee-ubuntu at
Mon Mar 30 13:32:06 UTC 2009

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.
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.


More information about the ubuntu-users mailing list