http://bugzilla.kernel.org/show_bug.cgi?id=12476





------- Comment #9 from [email protected]  2009-01-21 00:04 -------
Hi, Ivo
    Thanks for the info.
    From the acpidump we know that the there exists the ACPI fan device and the
FAN device is controlled by the following ACPI object:
    >Method (_ON, 0, Serialized)            {
         If (ECON) // ECON will be one after EC initialization
        {
              If (DTSE)
              {
                 \_SB.SECB (0x9C, 0x05)
              }
        }
        Store (One, VFN0)
   }

   If the DTSE is non-zero, the SECB object will be evaluated and the physical
FAN device will be operated. But from the data in comment #7 it seems that the
DTSE is zero. In such case the ACPI object related with ACPI FAN device is
useless. So the FAN device can't be turned on/off by evaluating the ACPI
objects.

   Based on the above analysis it seems that this is a BIOS bug. Will you
please check whether it can be fixed by BIOS upgrading?
   Thanks.


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