[ltp] Re: ThinkPad T61 (7658CTO) Thermal Sensors
Daniel Castro
linux-thinkpad@linux-thinkpad.org
Tue, 22 Jul 2008 15:52:39 +0100
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Not safe you say... uhm...
Well even with the fan constantly running the cpu temp will be around
65C on normal CPU usage.
I haven't found anywhere where it actually says what's safe and what's
not. Not even on those websites you quote. But anything below 75C for
the cpu sounds safe to me. Is it not really?
________________________
Daniel Castro
Networking and Distributed Systems
Computer Science
Trinity College Dublin
Mobile: 083-318-2058
86.4.3 Trinity Hall, Dartry Road, Dublin 6
________________________
green wrote:
> On Tue, 2008.07.22, 204, Daniel Castro wrote:
>
>> So to elaborate more in this:
>> I think I have identified some of the sensors:
>>
>> dancasmo@BlackBeauty:~$ cat /proc/acpi/ibm/thermal
>> temperatures: 59 50 42 -128 50 -128 25 -128 49 54 50 -128 -128 -128
>> -128 -128
>>
>> +------------------------------------------------+
>> | Index in "thermal" |Location (estimated) |
>> |-----------------------+------------------------|
>> | 1 |CPU |
>> |-----------------------+------------------------|
>> | 2 |MiniPCI |
>> |-----------------------+------------------------|
>> | 3 |HDD |
>> |-----------------------+------------------------|
>> | 4 |n/a (-128) |
>> |-----------------------+------------------------|
>> | 5 |Battery 1 |
>> |-----------------------+------------------------|
>> | 6 |n/a (-128) |
>> |-----------------------+------------------------|
>> | 7 |Battery 2 |
>> |-----------------------+------------------------|
>> | 8 |n/a (-128) |
>> |-----------------------+------------------------|
>> | 9 |????? |
>> |-----------------------+------------------------|
>> | 10 |????? |
>> |-----------------------+------------------------|
>> | 11 |????? |
>> |-----------------------+------------------------|
>> | 12 |n/a (-128) |
>> |-----------------------+------------------------|
>> | 13 |n/a (-128) |
>> |-----------------------+------------------------|
>> | 14 |n/a (-128) |
>> |-----------------------+------------------------|
>> | 15 |n/a (-128) |
>> |-----------------------+------------------------|
>> | 16 |n/a (-128) |
>> +------------------------------------------------+
>>
>> I still don't know what indexes 9, 10 and 11 are. Anyone knows? Or any
>> ideas how I can figure this out?
>> Also, those temperatures are with the fan off, I have it configured to be
>> off when CPU temp is below 70C and 60C for the rest. Is that safe?
>>
>
> No! That is likely not safe. The CPU is, I think, the most
> temperature-tolerant area in the system. Watch the other temperatures too.
>
> Although no one really knows what the safe thresholds are for the sensors.
>
> http://www.thinkwiki.org/wiki/How_to_control_fan_speed
> http://www.thinkwiki.org/wiki/ACPI_fan_control_script
>
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Not safe you say... uhm...<br>
Well even with the fan constantly running the cpu temp will be around
65C on normal CPU usage.<br>
I haven't found anywhere where it actually says what's safe and what's
not. Not even on those websites you quote. But anything below 75C for
the cpu sounds safe to me. Is it not really?<br>
<pre class="moz-signature" cols="72">________________________
Daniel Castro
Networking and Distributed Systems
Computer Science
Trinity College Dublin
Mobile: 083-318-2058
86.4.3 Trinity Hall, Dartry Road, Dublin 6
________________________
</pre>
<br>
<br>
green wrote:
<blockquote cite="mid:20080722134718.GH11085@swansys" type="cite">
<pre wrap="">On Tue, 2008.07.22, 204, Daniel Castro wrote:
</pre>
<blockquote type="cite">
<pre wrap=""> So to elaborate more in this:
I think I have identified some of the sensors:
dancasmo@BlackBeauty:~$ cat /proc/acpi/ibm/thermal
temperatures: 59 50 42 -128 50 -128 25 -128 49 54 50 -128 -128 -128
-128 -128
+------------------------------------------------+
| Index in "thermal" |Location (estimated) |
|-----------------------+------------------------|
| 1 |CPU |
|-----------------------+------------------------|
| 2 |MiniPCI |
|-----------------------+------------------------|
| 3 |HDD |
|-----------------------+------------------------|
| 4 |n/a (-128) |
|-----------------------+------------------------|
| 5 |Battery 1 |
|-----------------------+------------------------|
| 6 |n/a (-128) |
|-----------------------+------------------------|
| 7 |Battery 2 |
|-----------------------+------------------------|
| 8 |n/a (-128) |
|-----------------------+------------------------|
| 9 |????? |
|-----------------------+------------------------|
| 10 |????? |
|-----------------------+------------------------|
| 11 |????? |
|-----------------------+------------------------|
| 12 |n/a (-128) |
|-----------------------+------------------------|
| 13 |n/a (-128) |
|-----------------------+------------------------|
| 14 |n/a (-128) |
|-----------------------+------------------------|
| 15 |n/a (-128) |
|-----------------------+------------------------|
| 16 |n/a (-128) |
+------------------------------------------------+
I still don't know what indexes 9, 10 and 11 are. Anyone knows? Or any
ideas how I can figure this out?
Also, those temperatures are with the fan off, I have it configured to be
off when CPU temp is below 70C and 60C for the rest. Is that safe?
</pre>
</blockquote>
<pre wrap=""><!---->
No! That is likely not safe. The CPU is, I think, the most
temperature-tolerant area in the system. Watch the other temperatures too.
Although no one really knows what the safe thresholds are for the sensors.
<a class="moz-txt-link-freetext" href="http://www.thinkwiki.org/wiki/How_to_control_fan_speed">http://www.thinkwiki.org/wiki/How_to_control_fan_speed</a>
<a class="moz-txt-link-freetext" href="http://www.thinkwiki.org/wiki/ACPI_fan_control_script">http://www.thinkwiki.org/wiki/ACPI_fan_control_script</a>
</pre>
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