RE: [ACPI] Processor C2 State on ECS K7S5A Mainboard (Sis 735 chi pset)

[Grover, A. <and...@in...>]

Hi Wayne,

The change from the until now is that instead of just making sure the
latency for C2 is OK, we also check that the plvl2 address is legit. I think
the old version saying you had C2 was wrong. So, I'd say the chances of
getting C2 working on this machine are zero. Sorry.

Regards -- Andy

> From: Wayne Whitney [mailto:wh...@ma...]
> I am unable to get processor sleep state C2 to work on an ECS K7S5A
> mainboard (Sis 735 chipset).  Under kernel 2.5.4-dj3,
> /proc/acpi/processor/0/status looks like:
> 
>   Bus Mastering Activity:  00000000
>   C-State Utilization:     C1[715548] C2[71554] C3[0]
> 
> The number for C2 is always 1/10 of that for C1.  I believe that means
> that C2 is not working, that the machine immediately returns 
> from C2 back
> into C1?  With kernel 2.5.4-dj3 and the acpi-20020214 patch, the
> /proc/acpi/processor/CPU1 files disclaim any support for the C2 state.

> Is 
> there any hope
> of getting the C2 state working on this hardware?  I should 
> note that I am
> using an Athlon Thunderbird 1000/100, and that I previously was
> successfullly using an ASUS A7V mainboard (Via KT133 chipset) with C2
> sleeping and power saving from "bus disconnect on STPGNT".