C3 on Travelmate 8000

C3 on Travelmate 8000

[Daniel Jasper]

Hi,

on my Travelmate 8005 (with Pentium M - Dothan) there is constant bus 
master activity. I already tried to disable USB, PCMCIA, Network, 
Framebuffer, Cpufreq etc., but even with a minimalistic system there ist 
still the following output of /proc/acpi/processor/CPU0/power:

active state:            C2
default state:           C1
bus master activity:     ffffffff
states:
    C1:                  promotion[C2] demotion[--] latency[000] 
usage[00000010]
   *C2:                  promotion[C3] demotion[C1] latency[001] 
usage[00901857]
    C3:                  promotion[--] demotion[C2] latency[085] 
usage[00000000]

Is there anything else I can do? Or can I somehow find out, what is 
causing the bus master activity? Disabling the bm_check=1 in the 
processor.c code works, but that is probably the wrong solution.


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Re: C3 on Travelmate 8000

[Nate Lawson]

> on my Travelmate 8005 (with Pentium M - Dothan) there is constant bus 
> master activity. I already tried to disable USB, PCMCIA, Network, 
> Framebuffer, Cpufreq etc., but even with a minimalistic system there ist 
> still the following output of /proc/acpi/processor/CPU0/power:
> 
> active state:            C2
> default state:           C1
> bus master activity:     ffffffff
> states:
>    C1:                  promotion[C2] demotion[--] latency[000] 
> usage[00000010]
>   *C2:                  promotion[C3] demotion[C1] latency[001] 
> usage[00901857]
>    C3:                  promotion[--] demotion[C2] latency[085] 
> usage[00000000]
> 
> Is there anything else I can do? Or can I somehow find out, what is 
> causing the bus master activity? Disabling the bm_check=1 in the 
> processor.c code works, but that is probably the wrong solution.

You should check the processor/chipset errata ("specification update" in 
Intel-language).  Perhaps the BM status register is broken on your 
particular chipset.

-- 
Nate


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