[coreboot] ACPI on m57sli v1.0

Tiago Marques tiagomnm at gmail.com
Mon Jul 6 18:31:19 CEST 2009

Hi all,

Can someone please answer me these questions?

Best regards,
Tiago Marques

On Sat, Jul 4, 2009 at 2:06 AM, Tiago Marques<tiagomnm at gmail.com> wrote:
> Hi,
> One thing I would like to ask, not just regarding this motherboard but
> all AM2/AM2+/AM3 boards.
> Would it be possible to implement a feature that would allow us to
> configure custom P-States to save on CMOS, other than what the
> manufacturer specifies? Most BIOS allow setting lower and higher
> multipliers than stock on some CPUs but disable CPU power management
> altogether when doing so. It would be quite a leap forward, when
> compared with vendor BIOS to be able to specify at least one VID and
> FID for the high power state and another FID and VID for the low power
> state.
> With overclocking the benefits are enormous in the power bill and also
> for the low power state, since the manufacturer specifies 1.1v @ 1GHz
> and most CPUs handle 0.8v @ 800MHz quite easily. I'd love to get those
> low power states on my home server :)
> I've been trying to get hold of one of these M57SLI-S4 boards to try
> and implement this but would like to know if this is something
> possible to achieve with the current code base.
> Best regards,
> Tiago Marques
> On Fri, Jul 3, 2009 at 3:55 PM, Harald Gutmann<harald.gutmann at gmx.net> wrote:
>> On Friday 03 July 2009 00:15:33 Rudolf Marek wrote:
>>> > Maybe Rudolf Marek can us help here, because he wrote the automatic
>>> > generation for that ACPI table (SSDT).
>>> Hi,
>>> If I understand correctly, the 1800MHz is missing? If so, please check what
>>> is the portal frequency for this CPU. Maybe it is 2000 and not 1800 (so
>>> prop bios is wrong). Check the BKDG. I'm very busy so I think better would
>>> be if someone else could check.
>> I'll also check this, to see if coreboot or vendor is wrong.
>> Thanks for you fast reply!
>>> The interupt driven parport works now?
>> Right now the parport is just working with polling.
>> But I think I can fix it to get it interrupt driven with a little dsdt.asl
>> patch.
>> (Maybe sunday, or even towmorrow.)
>>> Rudolf
>> Regards,
>> Harald
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