Re: [Mactel-linux-devel] C4 state problem

[Miguel S. F. <mig...@gm...>]

Hi all,

I too only have C1 and C2 states.


On 4/7/07, Ludovic Rousseau <lud...@gm...> wrote:
> On 07/04/07, Sven Anders <an...@an...> wrote:
> > For a start we take a look at the current available c-states:
> >
> > #> cat /proc/acpi/processor/CPU?/power
> >
> > active state:            C3
> > max_cstate:              C8
> > bus master activity:     00000000
> > maximum allowed latency: 8000 usec
> > states:
> >     C1:                  type[C1] promotion[C2] demotion[--] latency[001]
> > usage[00002590] duration[00000000000000000000]
> >     C2:                  type[C2] promotion[C3] demotion[C1] latency[001]
> > usage[00002086] duration[00000000000006795863]
> >    *C3:                  type[C3] promotion[--] demotion[C2] latency[055]
> > usage[00003633] duration[00000000000009200376]
>
> I don't know if it is of any interest but I have a different result:
>
> $ cat /proc/acpi/processor/CPU0/power
> active state:            C2
> max_cstate:              C8
> bus master activity:     00000000
> states:
>     C1:                  type[C1] promotion[C2] demotion[--]
> latency[000] usage[00000010] duration[00000000000000000000]
>    *C2:                  type[C2] promotion[--] demotion[C1]
> latency[001] usage[01409563] duration[00000000005313483434]
>
> I have a MacBook Pro with Core1Duo and using the Debian Etch
> 2.6.18-4-686 kernel (no additional patch)
>
> Bye

This is a Macbook Pro 15.4", Dual Core T2500 cpu.
I get low battery uptime. (+/- 2h, not shure)

Kernel is 2.6.18.4-mactel
I'm using ATI drivers:  fglrx 8.31.5
The distro is ubuntu 6.10



[CPU-POWERSTATES]
--(cray)-(pts2)-(14:30/12-Abr-07)--
--<~>-- cat /proc/acpi/processor/CPU?/power
active state:            C2
max_cstate:              C8
bus master activity:     00000000
states:
    C1:                  type[C1] promotion[C2] demotion[--]
latency[000] usage[00000010] duration[00000000000000000000]
   *C2:                  type[C2] promotion[--] demotion[C1]
latency[001] usage[43467481] duration[00000000203957347293]
active state:            C2
max_cstate:              C8
bus master activity:     00000000
states:
    C1:                  type[C1] promotion[C2] demotion[--]
latency[000] usage[00000010] duration[00000000000000000000]
   *C2:                  type[C2] promotion[--] demotion[C1]
latency[001] usage[43198784] duration[00000000208704738735]

Why doesn't the C3 state appear in here??


-- snippet of dmesg --
ACPI: (supports S0 S3 S4 S5)
...
ACPI (exconfig-0455): Dynamic SSDT Load - OemId [APPLE ] OemTableId [
Cpu0Ist] [20060707]
ACPI (exconfig-0455): Dynamic SSDT Load - OemId [APPLE ] OemTableId [
Cpu0Cst] [20060707]
ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3])
ACPI: Processor [CPU0] (supports 8 throttling states)
ACPI (exconfig-0455): Dynamic SSDT Load - OemId [APPLE ] OemTableId [
Cpu1Ist] [20060707]
ACPI (exconfig-0455): Dynamic SSDT Load - OemId [APPLE ] OemTableId [
Cpu1Cst] [20060707]
ACPI: CPU1 (power states: C1[C1] C2[C2] C3[C3])
ACPI: Processor [CPU1] (supports 8 throttling states)



[FANS]
--(cray)-(pts2)-(14:38/12-Abr-07)--
--</sys/devices/platform/applesmc>-- for i in fan*; do echo -n "$i: "
; cat $i; done
fan0_actual_speed: 998
fan0_manual: 0
fan0_maximum_speed: 6000
fan0_minimum_speed: 1000
fan0_safe_speed: 1200
fan0_target_speed: 1000
fan1_actual_speed: 996
fan1_manual: 0
fan1_maximum_speed: 6000
fan1_minimum_speed: 1000
fan1_safe_speed: 1200
fan1_target_speed: 1000

Any extra info about energy savings in linux ?

Best regards,

-- 
Miguel Sousa Filipe