linux-kernel - Re: [BUG] Fans keep running, first found since v2.6.38-rc7

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Date:	Wed, 9 Mar 2011 11:41:28 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Wang Lei <f3d27b@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [BUG] Fans keep running, first found since v2.6.38-rc7

On Wednesday, March 09, 2011, Wang Lei wrote:
> Hi, hackers!
> 
> I have ever reported some bugs, always got kind help, even though one
> thing is not fixed yet, leaving my SBx00 sound card no voice.
> 
> Recently, i encounter another problem, after startup all fans keep
> running. I guess it's a bug. I first saw this at v2.6.38-rc7. It still
> exists at v2.6.38-rc8. The version I'm running now, v2.6.38-rc6+, is OK.
> 
> I cat /sys/class/thermal/thermal_zone0/trip_point_*_temp at the latest
> v2.6.38-rc8, get this output:
> 
> [~]$ cat /sys/class/thermal/thermal_zone0/trip_point_*_temp
> 105000
> 15900
> 15900
> 15900
> 15900
> 15900
> [~]$ 
> 
> This is the output at v2.6.38-rc6+:
> 
> [~]$ cat /sys/class/thermal/thermal_zone0/trip_point_*_temp
> 105000
> 95000
> 75000
> 65000
> 55000
> 40000
> [~]$
> 
> Any help is appreciated.

There was only one commit in that area since 2.6.38-rc6, but it shouldn't
affect the functionality this way.

Is yout thermal management controlled by ACPI?

Rafael
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