Missing C-States on Core Duo
On my laptop  shows a maximum of 8 c-states. But only 3 are in use.
Where are the others gone? The output of dmesg shows only three of
them, too. The max_cstate reports 8 so whats wrong with my system? As
far as I know, there should be at least a C4-state. Is there any
parameter, I need to pass through the kernel or is it a damn limitation
of my system or what else went wrong? The laptop is a Fujitsu-Siemens
S7110 and I'm using a brand new Etch.
active state: C3
bus master activity: 00000000
C1: type[C1] promotion[C2] demotion[--] latency
C2: type[C2] promotion[C3] demotion[C1] latency
*C3: type[C3] promotion[--] demotion[C2] latency
#dmesg | grep "power states"
ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3])
ACPI: CPU1 (power states: C1[C1] C2[C2] C3[C3])