Enhanced SpeedStep on Asus M2400Ne with Pentium-M Dothan

Enhanced SpeedStep on Asus M2400Ne with Pentium-M Dothan

[Tom]

I recently bought an Asus M2400Ne laptop.  It is a Centrino, and it has the
newer generation of the Pentium-M processor, Dothan.  Dubiously, Asus advertises
a Power4Gear power management function on it, which I assumed only is a utility
to change Windows power management schemes.  I'm instead running Gentoo Linux on
it, specifically kernel 2.6.8.1, unpatched except for a small patch to
speedstep-centrino.c to make it recognize the new Dothans.

I am having absolutely no success getting Intel Enhanced SpeedStep to work on
this notebook.  Using either kernel module, acpi (ACPI Processor P-States
driver) or speedstep-centrino (Intel Enhanced SpeedStep driver), I get a "No
such device" error.  In dmesg, speedstep-centrino tells me to contact the
maintainer (I did, and he said it's something with my laptop--it is looking for
a freq./voltage table for my processor when there should be one in the BIOS),
and acpi is silent.

I have talked with a few people about this, and I'm still stuck.  Someone said
that (by looking at my DSDT) Asus renamed some methods in the DSDT (probably to
make their "proprietary" power management technology require special drivers) by
one letter (from "_***" to "A***"), but I have no further ideas on how to
proceed.  I wouldn't mind either making a custom DSDT (but I wouldn't know what
names to change) or editing some files in my copy of the kernel to make it call
the "A***" methods instead (same problem), but I'm really stuck.

Any help that anyone could offer would be greatly appreciated.

Thanks,

Tom



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Re: Enhanced SpeedStep on Asus M2400Ne with Pentium-M Dothan

[Stefan Seyfried]

On Sun, Sep 05, 2004 at 11:26:16PM +0000, Tom wrote:
 
> I have talked with a few people about this, and I'm still stuck.  Someone said
> that (by looking at my DSDT) Asus renamed some methods in the DSDT (probably to
> make their "proprietary" power management technology require special drivers) by
> one letter (from "_***" to "A***"), but I have no further ideas on how to
> proceed.  I wouldn't mind either making a custom DSDT (but I wouldn't know what
> names to change) or editing some files in my copy of the kernel to make it call
> the "A***" methods instead (same problem), but I'm really stuck.
> 
> Any help that anyone could offer would be greatly appreciated.

Maybe you have to turn the speedstep feature on in the BIOS? Just a guess,
but i thik i read about some BIOSen which just renamed the corresponding
methods when the feature was switched off.
-- 
Stefan Seyfried



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Re: Enhanced SpeedStep on Asus M2400Ne with Pentium-M Dothan

[Tom]

Stefan Seyfried <seife@...> writes:
> Maybe you have to turn the speedstep feature on in the BIOS? Just a guess,
> but i thik i read about some BIOSen which just renamed the corresponding
> methods when the feature was switched off.

Nope.  There's a SpeedStep option in the BIOS, but it doesn't change the
invalid DSDT table.

Any other ideas, anyone?  I've emailed Asus support but I'm not sure
how Linux-friendly they are.

--Tom



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Re: Re: Enhanced SpeedStep on Asus M2400Ne with Pentium-M Dothan

[Sebastian Henschel]

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hello tom...

* Tom <gmane.20.thinkinginbinary-w1QkCcy0X+Ct7aBEGUsviw@public.gmane.org> [2004-09-07 15:30 +0200]:
> Stefan Seyfried <seife@...> writes:
> > Maybe you have to turn the speedstep feature on in the BIOS? Just a guess,
> > but i thik i read about some BIOSen which just renamed the corresponding
> > methods when the feature was switched off.
> 
> Nope.  There's a SpeedStep option in the BIOS, but it doesn't change the
> invalid DSDT table.
> 
> Any other ideas, anyone?  I've emailed Asus support but I'm not sure
> how Linux-friendly they are.

i have installed an ASUS M2400Neb two weeks ago and Enhanced SpeedStep
worked then, i believe. i can mail you the owner's email address in
private, if you (and he) want(s).

did you install the latest BIOS from ASUS?
ftp://ftp.asus.com/pub/ASUS/nb/M2Ne/m2ne_0203.zip

hth,
 sebastian
-- 
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::: ..O
::: OOO
::: lynx -source http://www.kodeaffe.de/shensche.pub | gpg --import

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