fan control (thinkpad t42)

fan control (thinkpad t42)

[Frederik Eaton]

Hello,

I have just purchased an IBM ThinkPad T42.

Most of the noise it makes comes from the CPU fan. This is very quiet
when the computer first turns on, or when it comes out of sleep, but
usually after a few minutes it goes into a different mode. In the new
mode the fan is loud, and worse, it "revs" every few seconds - so
rather than making a constant noise, there is something of a rhythm to
it which I find annoying.

I'm wondering if there is a way to control the fan to keep it from
doing this. I have the processor running at the slowest speed, so it
shouldn't be producing too much heat.

There is nothing in "/proc/acpi/fan/", I'm not sure what to make of
that.

# uname -a
Linux fly 2.6.12-9-686 #1 Mon Oct 10 13:25:32 BST 2005 i686 GNU/Linux
# cat /proc/cmdline 
root=/dev/hda1 ro apm=on acpi=on nolapic quiet splash

Thanks,

Frederik

Re: fan control (thinkpad t42)

[Robert Zwerus]

On Thursday 29 December 2005 01:36, Frederik Eaton wrote:
> Most of the noise it makes comes from the CPU fan. This is very quiet
> when the computer first turns on, or when it comes out of sleep, but
> usually after a few minutes it goes into a different mode. In the new
> mode the fan is loud, and worse, it "revs" every few seconds - so
> rather than making a constant noise, there is something of a rhythm to
> it which I find annoying.

You should have a look at:
http://www.thinkwiki.org/wiki/Problem_with_fan_noise
-- 
A Dieu,
 Robert Zwerus - WWW: http://zwering.adsl.utwente.nl
 ICQ UIN: 3943443 - MSN: robert_zwerus@hotmail.com

Re: fan control (thinkpad t42)

[Frederik Eaton]

Wow, thanks. That has everything.

Frederik

On Thu, Dec 29, 2005 at 02:47:44AM +0100, Robert Zwerus wrote:
> On Thursday 29 December 2005 01:36, Frederik Eaton wrote:
> > Most of the noise it makes comes from the CPU fan. This is very quiet
> > when the computer first turns on, or when it comes out of sleep, but
> > usually after a few minutes it goes into a different mode. In the new
> > mode the fan is loud, and worse, it "revs" every few seconds - so
> > rather than making a constant noise, there is something of a rhythm to
> > it which I find annoying.
> 
> You should have a look at:
> http://www.thinkwiki.org/wiki/Problem_with_fan_noise
> -- 
> A Dieu,
>  Robert Zwerus - WWW: http://zwering.adsl.utwente.nl
>  ICQ UIN: 3943443 - MSN: robert_zwerus@hotmail.com
> 

Re: fan control (thinkpad t42)

[Wil Reichert]

I run Linux on my T42.  I've got the latest BIOS, firmware, etc
updates using IBMs update tool & when theres no load, the fan is
quiet.  Some of those workarounds on the wiki looked like good ways to
toast your laptop.

Wil

On 12/28/05, Frederik Eaton <frederik@a5.repetae.net> wrote:
> Wow, thanks. That has everything.
>
> Frederik
>
> On Thu, Dec 29, 2005 at 02:47:44AM +0100, Robert Zwerus wrote:
> > On Thursday 29 December 2005 01:36, Frederik Eaton wrote:
> > > Most of the noise it makes comes from the CPU fan. This is very quiet
> > > when the computer first turns on, or when it comes out of sleep, but
> > > usually after a few minutes it goes into a different mode. In the new
> > > mode the fan is loud, and worse, it "revs" every few seconds - so
> > > rather than making a constant noise, there is something of a rhythm to
> > > it which I find annoying.
> >
> > You should have a look at:
> > http://www.thinkwiki.org/wiki/Problem_with_fan_noise
> > --
> > A Dieu,
> >  Robert Zwerus - WWW: http://zwering.adsl.utwente.nl
> >  ICQ UIN: 3943443 - MSN: robert_zwerus@hotmail.com
> >
> -
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