linux-kernel - Re: Acer Aspire One fan control

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Date:	Fri, 13 Feb 2009 20:34:40 +0100
From:	Peter Feuerer <peter@...e.net>
To:	Thomas Renninger <trenn@...e.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Acer Aspire One fan control

Thomas Renninger writes:

> 
> Does it help if you do:
> echo 10 >/proc/acpi/thermal_zone/*/polling_frequency

Actually there is nothing in /proc/acpi/thermal_zone/. So it seems for me, 
that there is no driver which handles the temperature and the fan of the 
Acer Aspire One yet. A search on google didn't disprove it. That's why I 
started to write my own kernel module. But I tested it only with 2.6.28.4. 
Maybe there's already something in 2.6.29, not sure about it. 

> If the fan is controlled via thermal ACPI trip points, maybe latest kernel
> versions do help? There were several commits lately in this area, e.g.:
> 676962dac6e267ce7c13f73962208f9124a084bb
> f5adfaa372c76423b6e8e4727a9701330374f364

Those patches have been applied to 2.6.28.

> The latter adds a boot param you could give a try if you think it's worth it:
> ACPI: Add "acpi.power_nocheck=1" to disable power state check in power
> transition

I will try the acpi.power_nocheck option, but google results on that don't 
sound very promising.

--peter
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