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    SubjectRe: swsusp and suspend2 like to overheat my laptop


    On Wed, 9 Aug 2006, Andreas Mohr wrote:

    > On Wed, Aug 09, 2006 at 07:45:23AM -0400, Steven Rostedt wrote:
    > > It does look like something isn't setting up the ACPI power properly on
    > > resume, and that the CPU is probably in a busy loop while the machine is
    > > idle. Just a guess.
    >
    > In that case could you post
    > cat /proc/acpi/processor/CPU?/*
    > ?

    This is after a suspend:

    $ cat /proc/acpi/processor/CPU*/*
    processor id: 0
    acpi id: 0
    bus mastering control: yes
    power management: no
    throttling control: yes
    limit interface: yes
    active limit: P0:T0
    user limit: P0:T0
    thermal limit: P0:T0
    active state: C1
    max_cstate: C8
    bus master activity: 00000000
    states:
    *C1: type[C1] promotion[--] demotion[--] latency[000]
    usage[00000000] duration[00000000000000000000]
    state count: 4
    active state: T0
    states:
    *T0: 00%
    T1: 25%
    T2: 50%
    T3: 75%
    processor id: 1
    acpi id: 1
    bus mastering control: yes
    power management: no
    throttling control: yes
    limit interface: yes
    active limit: P0:T0
    user limit: P0:T0
    thermal limit: P0:T0
    active state: C1
    max_cstate: C8
    bus master activity: 00000000
    states:
    *C1: type[C1] promotion[--] demotion[--] latency[000]
    usage[00000000] duration[00000000000000000000]
    state count: 4
    active state: T0
    states:
    *T0: 00%
    T1: 25%
    T2: 50%
    T3: 75%



    >
    > Perhaps we're losing ACPI C2/C3 state power saving, and checking
    > the busmaster activity indicators there would be useful, too.
    >
    > Oh, in this context maybe it's actually a problem of a misbehaving driver?
    > An active USB mouse is known to distort ACPI power saving, causing reduced
    > notebook battery operation length (due to busmaster activity preventing
    > ACPI idling, I think). Now what if some certain driver actually caused
    > permanent busmaster activity...?

    I unplug everything before doing a suspend. Right now I'm leaving the
    network connected so I don't need to go throught the connection process
    again.


    Got to leave the hotel now, eat breakfast and go to work ;)

    -- Steve

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