On Mon, 2008-12-08 at 05:17 +0800, Rafael J. Wysocki wrote:
> On Friday, 21 of November 2008, Zhang Rui wrote:
>From the test it seems that the shutdown is caused by that the
temperature is above the critical threshold.
>CRT threshold 100
>the temperature 144C
But the problem is why the temperature is above the critical threshold.
>From the acpidump the temperature is obtained by evaluating the _TMP
object.
Method (_TMP, 0, Serialized)
{
If (DTSE)
{
If (LGreaterEqual (DTS1, DTS2))
{
Return (Add (0x0AAC, Multiply (DTS1, 0x0A)))
}
Return (Add (0x0AAC, Multiply (DTS2, 0x0A)))
}
If (ECON)
{
Return (Add (0x0AAC, Multiply
(\_SB.PCI0.LPC.WBEC.DTMP, 0x0A)))
}
Return (0x0BB8)
}
>From the above definition of _TMP object the temperature will be related
with the following factor:
a. DTSE . If the DTSE is non-zero, the temperature will be the
maixium of DTSE1/DTS2. But the DTSE/DTS1/DTS2 is defined in ACPI NVS
memory region. If the DTSE is non-zero, in theory the shutdown will
happen on the kernel of 2.6.28-rc3.
b. DTMP. When the DTSE is zero, the temperature will be obtained from
DTMP, which is an EC internal register.
Hi, Maxime
As there exist some changes related with EC between 2.6.28-rc3/rc5,
Will you please use the git-bisect to identify which commit causes the
regression?
Thanks.
> > > ...
> > > temperature: 51 C
> > > temperature: 51 C
> > > temperature: 144 C
> > >
> > > And then it shutdowns because critical temperature was reached
> > >
> > > Another thing that might be important : the output of dmesg
> > > Every 5 seconds this message appears (not in 2.6.28-rc3):
> > >
> > > ACPI: Transitioning device [FAN] to D3
> > > ACPI: Unable to turn cooling device [ffff81007fb656d0] 'off'
> > >
> > > Hope it will help you.
>
> I wonder why _may_ be the reason of this. Alex?
>
> Rafael
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