RE: Query regarding the linux ACPI

["Adachi, Kenichi" <adachi-fvZ7ij+YLgEZc9YY0SgeQc8NsWr+9BEh@public.gmane.org>]

Hi,

> That means this option can be programmed in the BIOS and we
> can have it as
> option in the BIOS.
> Am I right ?
>

Power button override is done at hardware level as Derek pointed out and
what you have to look into is the Datasheet of your chipset. 

For example, ICH4 Datasheet says:

  2.10 Power Management Interface
  Table 2-10. Power Management Interface Signals

  <Quote>
  PWRBTN#
      :
  If PWRBTN# is pressed for more than 4 seconds, this causes an
unconditional transition (power button override) to the S5 state with
only the PWRBTN# available as a wake event. Override occurs even if the
system is in the S1-S4 states. This signal has an internal pull-up
resistor.
  </Quote>

Thanks,
- Adachi, Kenichi 



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