http://bugzilla.kernel.org/show_bug.cgi?id=6519





------- Additional Comments From [EMAIL PROTECTED]  2006-05-15 12:26 -------
 
>> So in acpi_processor_get_power_info, 
>> acpi_processor_get_power_info_cst fails and
>> acpi_processor_get_power_info_fadt is called. The latter 
>> finds states C2 and C3
>> but assigns latencies which, suspiciously, are each 1 
>> greater than the
>> permissible maximum. Would these be dummy values that get 
>> inserted when genuine values could not be read?

These values are inserted by the BIOS writer to indicate that
the the platform  does not support these C-states.

Generally, we've found that vendors assume the OS will use _CST
and will ignore the FADT, and thus they don't bother putting
anything interesting in the FADT -- as that path is never tested.



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