Re: Query regarding the linux ACPI

[Derek Broughton <dbroughton-F3m4/jXepmf3fQ9qLvQP4Q@public.gmane.org>]

From: "siva" <sivakumar.subramani-uxC5H9eHYlcAvxtiuMwx3w@public.gmane.org>

> When I was reading the ACPI specification, I found the following information,
> The ACPI specification also allows that if the user presses the power button
for more than four seconds
> while the system is in the working state, a hardware event is generated and
the system will transition to the
> soft-off state. This hardware event is called a power button override. In
reaction to the power button
> override event, the hardware clears the power button status bit (PWRBTN_STS).
>
> I would like to know, whether this Power button override feature is available
in the Linux ACPI
> implementation. If it is implemented, where can I find them  and how to use
it?

It's a "hardware" event.  Surely ACPI isn't strictly involved.  I read this as
meaning that ACPI mustn't interfere with such function.  Certainly my Dell
Inspiron will shut off when I hold the power button down for 4 seconds without
generating an ACPI event.



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