Jeremy Fitzhardinge wrote:
I have a Thinkpad X60 with an Intel Core Duo T2400. In
/proc/acpi/thermal_zone, I'm getting two subdirectories, each with their
own set of files:
So your machine has two thermal zones..
The interesting thing is that the two sets of files are not consistent -
sometimes they don't even show the same temperature.
I would expect they wouldn't, otherwise there would be no reason for the
BIOS people to set up two thermal zones..
The reason I'm interested in this is that I think it's behind some of my
cpufreq problems. Sometimes the kernel decides that I just can't raise
the max frequency above 1GHz, because its been thermally limited (I've
put printks in to confirm that its the ACPI thermal limit on the policy
notifier chain which is limiting the max speed). It seems to me that
having a thermal zone for each core is a BIOS bug, since they're really
the same chip, but the THM1 entries should be ignored. I don't believe
How do you know they are one for each core? ACPI thermal zones can be
anywhere in the machine that needs OS-controlled cooling. Could be the
CPU heatsink, voltage regulator, or someplace else.
the CPU has ever approached either 97 C, let alone 127; while I put it
under a fair amount of load, it is sitting on a desktop with no airflow
obstructions, so if it really is overheating it suggests a serious
design problem with the hardware.
But I'm just speculating; I'm not really sure what all this means. Any
clues?
I think we need more information to decide what is going on here.. what
temperatures are registering in the thermal zones when the CPU clock is
being limited?
--
Robert Hancock Saskatoon, SK, Canada
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Home Page: http://www.roberthancock.com/
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