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From: "Renato S. Yamane" <yamane@diamondcut.com.br>
To: LKML <linux-kernel@vger.kernel.org>
Cc: hmh@hmh.eng.br, borislav@users.sf.net
Subject: Thinkpad T61 - Fan running a lot of time
Date: Tue, 24 Mar 2009 17:44:16 -0300	[thread overview]
Message-ID: <49C94620.8040309@diamondcut.com.br> (raw)

Hi,

Anyone have seen fan turned-on in 90% of the time?

I see that fan power-on when processor is up than 45°C and power-off 
when is under 45°C.

Temperature difference between 2 cores is 5°C in idle (Core1=45°C and 
Core2=40°C)

Local temperature is ~25°C, kpowersave is in "dynamic mode", my 2 cores 
(Intel T7500) is running 94% of the time in idle (checked with "top"), 
with clock in 800MHz.

The fan speed is ~2600RPM (always under 3000RPM), and I think that is 
not enough to cooling the processor, because is necessary 3min to 
decrease 1°C in Core1 and only 40sec to increase 1°C.

I think that is necessary a higher fan speed.

I see this in Debian Lenny (2.6.26-1) and 2.6.28.8 kernel... Maybe in 
other versions too.

Regards,
Renato

             reply	other threads:[~2009-03-24 20:51 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-03-24 20:44 Renato S. Yamane [this message]
2009-03-24 23:23 ` Thinkpad T61 - Fan running a lot of time Henrique de Moraes Holschuh
2009-03-25  1:01   ` Renato S. Yamane
2009-03-25  1:29     ` Henrique de Moraes Holschuh

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