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    SubjectRe: 2.6.22-rc1-mm1 [cannot change thermal trip points]
    Maciej Rutecki wrote:
    > In 2.6.20.9 I can change trippoints:
    >
    > echo "105:100:100:78:70:40:30" > /proc/acpi/thermal_zone/TZ0/trip_points
    > echo 10 > /proc/acpi/thermal_zone/TZ0/polling_frequency
    >
    > Then I got:
    > cat /proc/acpi/thermal_zone/TZ0/*
    > <setting not supported>
    > cooling mode: active
    > polling frequency: 10 seconds
    > state: active[2]
    > temperature: 45 C
    > critical (S5): 105 C
    > active[0]: 78 C: devices=0xdf415a40
    > active[1]: 70 C: devices=0xdf4159dc
    > active[2]: 40 C: devices=0xdf41598c
    > active[3]: 30 C: devices=0xdf41593c
    >
    > cat /proc/acpi/fan/*/*
    > status: off
    > status: off
    > status: on
    > status: on
    >
    > And fan turns on.
    >
    > In 2.6.22-rc1-mm1:
    > echo "105:100:100:78:70:40:30" > /proc/acpi/thermal_zone/TZ0/trip_points
    > bash: echo: write error: Błąd wejścia/wyjścia (input/output error)
    >
    > rutek:/home/maciek# cat /proc/acpi/thermal_zone/TZ0/*
    > <setting not supported>
    > polling frequency: 10 seconds
    > state: ok
    > temperature: 45 C
    > critical (S5): 256 C
    > active[0]: 78 C: devices=0xc1827a40
    > active[1]: 70 C: devices=0xc18279dc
    > active[2]: 60 C: devices=0xc182798c
    > active[3]: 50 C: devices=0xc182793c
    > rutek:/home/maciek# cat /proc/acpi/fan/*/*
    > status: off
    > status: off
    > status: off
    > status: off
    >
    > Fan turns on when temperature is over 50*C. (want: 30)
    >
    > A read this:
    > http://article.gmane.org/gmane.linux.acpi.devel/22750
    >
    > But I don't have colling_policy, but only colling_mode:
    > ls /proc/acpi/thermal_zone/TZ0/
    > cooling_mode polling_frequency state temperature trip_points
    >
    > Its bug or feature?
    >

    Committed to mainline May 10:

    Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=11ccc0f249cb01a129f54760b8ff087f242935d4
    Commit: 11ccc0f249cb01a129f54760b8ff087f242935d4
    Parent: de46c33745f5e2ad594c72f2cf5f490861b16ce1
    Author: Len Brown <len.brown@intel.com>
    AuthorDate: Mon Apr 30 22:36:01 2007 -0400
    Committer: Len Brown <len.brown@intel.com>
    CommitDate: Mon Apr 30 22:36:01 2007 -0400

    ACPI: thermal trip points are read-only
    -
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