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

[Alex Deucher]

On Tue, 14 Sep 2004 18:28:11 +0000, Suso Baleato <susinho@ultreia.org> wrote:
> 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...

I added an option in xorg 6.8.0 called "DynamicClocks" that turns on
automatic clock scaling on radeons.  it's not a full powerplay
implementation (I don't think it handles the chip gating and such),
but it does help for some people.

Alex

> 
> 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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