[ltp] [ACPI] fan always on: ACPI on IBM ThinkPad R51 (update)

[Suso Baleato]

Hi all.

While waiting for second level support answer to the always-on fan
problem I requested the original software, wich arrives to me today. I
have a second HD so I decided to install it and try again. I found a
"POWERPLAY" option in the XP's ATI Radeon Mobility 7500 driver, wich
is a powersaving feature of this chip. Activating this thing, the fan
stops *inmediatly* so apparently it exists a direct relationship between
the graphic chip and the fan behaviour.

I was seeking the last ATI proprietary driver but it does not seem to
support this chip. Do you know if there are some driver for linux wich
can use this feature? Other case... is anyone interested in developing
it? :) I can do a lot of betatesting...

O 9/9/2004, "pub@wigginghaus.de" <pub@wigginghaus.de> escribiu:

>Am Donnerstag, 9. September 2004 15:57 schrieb James Knott:
>> Svein Larsen wrote:
>> > I have an R50 and i think it was me who started this thread.
>> > Can someone please update me if i missed something; is there a solution
>> > to make the fan stop when only cold air coming out of the fan? Its
>> > really annoying. I'am quite sure that when i boot Winoze (seldom tho :)
>> > the fan often stops when computer is idle. It never happens when booting
>> > into linux :/
>>
>> I'd rather have a fan that didn't stop, than one that didn't run.
>
>Boy, I wish I could laugh at this... :( Just kidding...
>Ok, here's my situation (R50): So far the only solution to stop the fan from
>running ALL the time with Linux is compiling the latest ATI Driver (which is
>not open and therefore not everybody's first choice) which has the energy
>saving features. It works better than the original XFree Driver.  I am also
>using speedstep with a 2.6.7 kernel. That way the fan pretty much behaves
>like under Window*, which is far from being what you expect from a machine
>that expensive. Oh - the latest Bios-Update (don't quite remember now which
>version) solved the problem with the fan running a little faster every 4-5
>seconds...
>
>Nils
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