[ltp] missing C4 power state on core duo (x60s)

[Martin Aumueller]

No C4 here either on a X60s with BIOS 1.04. And neither when on battery.

However, as opposed to almost never it now manages to enter C3 quite often - 
and then it emits the well-known noise. That is probably due to the fact that 
/proc/acpi/processor/CPU0/power never shows
bus master activity:     00000000
when the ohci_hci driver is loaded. This is probably the reason for the lower 
power consumption with BIOS 1.04.

Martin

On Thu July 27 2006 17:46, Kevin O'Brien wrote:
> Andrew Barr wrote:
> > On Thu, 2006-07-27 at 08:12 -0700, Kevin O'Brien wrote:
> >> Hello,
> >> When I look at /proc/acpi/processors/CPU*/power I only see ACPI power
> >> states
> >> C1, C2 and C3. According to intel documentation the core duo can enter
> >> C4 as
> >> well.
> >
> > Well, not that this has any bearing on your situation but on my R51
> > (Pentium M Dothan) I don't see C4 unless I am running on battery power.
> >
> > Andrew
>
> Andrew,
> Thank you for the reply. I don't see the C4 state even when running on
> battery power.
> Kevin
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