Re: ACPI and VIA C3

[Ludwig Meyerhoff <ludwig@antar.de>]

Hallo!

I already tried the epia1 patch for the 2.6.6 kernel, I even tried the 
acpi patch (acpi.sourceforge.net) for the 2.6.7 kernel, without getting 
the new kernel recognize the processor to have also a C2 state (saves 
about 25% power when idle) ...

What processor do You have (cat /proc/cpuinfo) and what does ACPI say 
(modprobe processor; cat /proc/acpi/processor/CPU0/power)?
Maybe something went wrong during the patching or I made something wrong 
in configuring the kernel?



Saluti!

Ludwig

Matthijs wrote:
> On Sat, 26 Jun 2004 19:40:10 +0200, Ludwig Meyerhoff <ludwig@antar.de>
> wrote:
>
>
> > I have a VIA C3 (Ezra) processor. It is very nice for "normal" 
> > applications, as it takes only a few watt.
> >
> > Now: does anyone know how I can achieve full ACPI support for my 
> > processor in a more recent kernel than 2.4.20? In special I would like 
> > to use frequency scaling/throttling, as most of the time my small 
> > computer does nothing.
>
>
> I also have a VIA C3 machine, installed kernel 2.6.6 on it. I have
> absolutely no knowledge of ACPI and all, but perhaps the following
> link will provide the information you need:
>
> http://www3.sympatico.ca/howlettfamily/epia/epia_howto/index.html
>
> According to section 8.1, it is possible to get frequency throttling
> to work, but with kernel 2.6.6 you need to patch the source and
> compile from scratch. I have done this, compiled the kernel 'the
> Debian way' with help from:
> http://www.desktop-linux.net/debkernel.htm
> ... and use the '.config' from the link supplied in section 11.1 from
> the first URL I wrote above.
>
> Good luck,