On 6/21/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:

Not at all, still the same.

Then maybe your BIOS correctly reports C4 through acpi. BTW I tested
on a Dell Inspiron 6400.
ACPI reports 3 c-states in dmesg:

ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3])
ACPI: Processor [CPU0] (supports 8 throttling states)
ACPI: CPU1 (power states: C1[C1] C2[C2] C3[C3])
ACPI: Processor [CPU1] (supports 8 throttling states)

Also /proc/acpi/processor/CPU0/power:
active state:            C0
max_cstate:              C8
bus master activity:     00000000
maximum allowed latency: 8000 usec
states:
   C1:                  type[C1] promotion[--] demotion[--]
latency[001] usage[00004077] duration[00000000000000000000]
   C2:                  type[C2] promotion[--] demotion[--]
latency[001] usage[04337133] duration[00000000007870996131]
   C3:                  type[C3] promotion[--] demotion[--]
latency[085] usage[02418145] duration[00000000013129058814]

Could you please check your dmesg output, and see how many C-states it reports?

Thanks,
Edwin
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