Re: RE: Presario DANGER

[Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org>]

Hi!

> > All the Compaq Presario's are in danger without ACPI. This is confirmed by new 
> > HP. (They d'ont feel to be responcible as always in certain companies. Make 
> > something, sell it and then so0rry c'ant help you)
> 
> That means you cannot even run DOS on that laptop or any software which
> disables interrupts for a long time thus stopping ACPI running. It also
> means it is not a PC compatible system. So its not even safe to boot
> your old PC games on, not even Doom
> 
> I'm under the impression ACPI requires proper thermal protection
> too.

Its there:

When the heat reaches the temperature indicated by _CRT, the OS must
immediately shutdown the system.
The system must disable the power either after the temperature reaches
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
some hardware-determined level above
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
_CRT or after a predetermined time has passed. Before disabling power,
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
platform designers should incorporate
some time that allows the OS to run its critical shutdown
operation. There is no requirement for a minimum
shutdown operation window that commences immediately after the
temperature reaches _CRT.  This is
because
*  Heat might rise rapidly in some systems and slower on others,
depending on casing design and
    environmental factors.
*  Shutdown can take several minutes on a server and only a few short
seconds on a hand-held device.
Because of this indistinct discrepancy and the fact that a critical
heat situation is a remarkably rare occurrence,
ACPI does not specify a target window for a safe shutdown. It is
entirely up to the OEM to build in a safe
buffer that it sees fit for the target platform.


								Pavel
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