From: Bruno Ducrot <ducrot@poupinou.org>
To: Saurabh Nanda <saurabhnanda@gmail.com>
Cc: linux-acpi@vger.kernel.org
Subject: Re: Laptop fan on Acer 4061NWLCi
Date: Mon, 3 Apr 2006 15:41:38 +0200 [thread overview]
Message-ID: <20060403134138.GA13970@poupinou.org> (raw)
In-Reply-To: <794f042d0604030408k3073a44dg70255e3342f4a2db@mail.gmail.com>
On Mon, Apr 03, 2006 at 04:38:06PM +0530, Saurabh Nanda wrote:
> Hi,
>
> I have recently bought an Acer 4061NWLCi laptop and am having trouble
> getting ACPI to work. I hope somoene will help me out :-)
>
> I am running Ubuntu Linux -- Breezy Badger 5.10. With the default
> Ubuntu kernel (2.6.12) ACPI did not work at all. I did not even get
> the battery status in GNOME. Then I installed the latest kernel (
> 2.6.16.1) and ACPI started working - at least partially! I could check
> my CPU temperature, AC adapter status, and battery status.
>
> The only thing not working is the CPU fan. I tried reading through my
> current(broken) DSDT and surprisingly there is no mention of a fan
> anywhere! In the Thermal Zone configuration there is no mention of
> _ACx (_AC0, _AC1, etc.) as well. I can post my DSDT to the list if it
> would help.
>
> Can anyone please help me in fixing this? Running my laptop without a
> fan is pretty dangerous as the CPU temperatures crosses 65 degrees
> celcius at times.
>
> Can I declare a fan and an active cooling temperature point in the
> DSDT, recompile it and hope that it would work? Has anyone else done
> this kind of a thing before?
Yes, only problem is to define _ON and _OFF methods in order to control
the fan device. Good luck...
With my own laptop (Acer TM 4102WLMi) I can only get the fan speed,
but that's all. I think it's possible to write some
different thresholds in order to control the cpu fan, but I don't
see why this is needed (after all 65 degree celcius should be ok for
a pentium-m). In the case of my Acer, the fan speed is available
at 0x5d, 0x5c on the EC space and I think there are some more Acer
models that define those.
Cheers,
--
Bruno Ducrot
-- Which is worse: ignorance or apathy?
-- Don't know. Don't care.
next prev parent reply other threads:[~2006-04-03 13:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-03 11:08 Laptop fan on Acer 4061NWLCi Saurabh Nanda
2006-04-03 13:41 ` Bruno Ducrot [this message]
2006-04-03 15:56 ` Saurabh Nanda
2006-04-03 16:45 ` Bruno Ducrot
-- strict thread matches above, loose matches on Subject: below --
2006-04-03 15:31 Karasyov, Konstantin A
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