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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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