https://bugzilla.kernel.org/show_bug.cgi?id=31302
Aaron Lu <aaron...@intel.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEEDINFO
--- Comment #11 from Aaron Lu <aaron...@intel.com> 2013-06-21 05:46:29 ---
(In reply to comment #10)
> Created an attachment (id=89451)
--> (https://bugzilla.kernel.org/attachment.cgi?id=89451) [details]
> acpidump
Your ACPI table provides a fake FAN control device, it doesn't do anything real
to turn on/off the FAN with the specified interface:
PowerResource (FN01, 0x00, 0x0000)
{
Method (_STA, 0, Serialized) // _STA: Status
{
Return (VFN1)
}
Method (_ON, 0, Serialized) // _ON_: Power On
{
Store (One, VFN1)
}
Method (_OFF, 0, Serialized) // _OFF: Power Off
{
Store (Zero, VFN1)
}
}
And VFN1 is just a variable in memory space used to track the power resource's
status:
Field (GNVS, AnyAcc, Lock, Preserve)
{
OSYS, 16,
... ...
Offset (0xEB),
DSEN, 8,
ECON, 8,
GPIC, 8,
CTYP, 8,
L01C, 8,
VFN0, 8,
VFN1, 8,
VDRV, 8
}
No wonder Linux can't turn on the FAN. A firmware bug I would say. Any BIOS
update available from your vendor site?
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