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DateTue, 12 Aug 2008 13:44:27 +0200
FromMilan Broz <>
SubjectRe: 2.6.27-rc1: critical thermal shutdown on thinkpad x60
Pavel Machek wrote:
> Hi!>>> On Tue, Aug 12, 2008 at 11:41:35AM +0200, Pavel Machek wrote:
>>>>>> Aug  6 11:00:10 amd kernel: ACPI: Critical trip point
>>>>>> Aug  6 11:00:10 amd kernel: Critical temperature reached (128 C),
>>>>>> shutting down.>>>>>> Aug  6 11:00:10 amd shutdown[24414]: shutting down for system halt
>>>>>>>>>>>> ...and machine went down at that point :-(.>>>>> I hope you can easily reproduce it?>>>>>>>>>> So it's new in 2.6.27rc1 and wasn't in 2.6.26? Can you please>>>> Yes, I'm very sure. It makes machine basically unusable.>>> Does this mean you can easily reproduce it?  >>> Please do a bisect then. >>>>>>> Not that one :-(. Thinkpad does not even have fan device: it is
>>>> controlled by hardware.>> Hi,>> I see exactly the same on my x60s, but during upgrade to 2.6.26.2.> > Are you sure?

yes. maybe some userspace tool controlling frequency is involved, no idea yet.
But it is 2.6.26 tree for sure.

> >> I found that (at least in my case) the problem is, that in
>> 2.6.25 the core frequency drop to 1GHz (instead of 1.67GHz) when
>> the temperature is above some limit.> > Can you verify that 2.6.26 is okay?

No, it is not ok.
I'll run bisect again, but I hit it at least one in some 2.6.26-rc too.

> >> Now, the CPU cores remains on 1.67GHz and fan is unable to cool them properly
>> under heavy load (even if I set "level disengaged" through thinkpad fan control,
>> temperature sensor shows after a while 128 C (probably not real temp,
>> I expect some critical flag => and it properly switch off the
>> system...)> > How do you control fans? I could not get anything but -EINVAL from IBM
> ACPI driver :-(.

you need add fan_control=1 to thinkpad_acpi module

http://www.thinkwiki.org/wiki/How_to_control_fan_speed
http://www.thinkwiki.org/wiki/ACPI_fan_control_script


>> (I had bad reproducer script in bisect and bisect failed, so I'll try it again,
>> but anyway, for me the bug is even in 2.6.26 tree. It never happened in 2.6.25.)> > Hmmm... that's seriously strange. I definitely don't see it in
> 2.6.26. Maybe it is config dependend?! (Attaching my 2.6.27-rc2
> failing config.)

hm. strange, I'll try this config too...

Milan


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