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From: John Baldwin <jhb@freebsd.org>
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Cc: Matthew Fleming <mdf@freebsd.org>, Nick Ulen <uncle@wolfman.devio.us>
Subject: Re: `hw.acpi.thermal.tz0.temperature' disappeared
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On Saturday, April 16, 2011 11:51:22 am Nick Ulen wrote:
> FreeBSD was successfully upgraded.
> 
> uname -v
> FreeBSD 9.0-CURRENT #0: Mon Apr 11 18:14:36 MSD 2011     
> root@test:/usr/obj/usr/src/sys/GENERIC 
> 
> Everything seems to be working well except
> `hw.acpi.thermal.tz0.temperature' disappeared from the list of available 
> sysctl variables.
> 
> sysctl hw.acpi.thermal.
> 
> hw.acpi.thermal.min_runtime: 0
> hw.acpi.thermal.polling_rate: 10
> hw.acpi.thermal.user_override: 0
> hw.acpi.thermal.tz0.active: -1
> hw.acpi.thermal.tz0.passive_cooling: 0
> hw.acpi.thermal.tz0.thermal_flags: 0
> hw.acpi.thermal.tz0._PSV: -1
> hw.acpi.thermal.tz0._HOT: -1
> hw.acpi.thermal.tz0._CRT: 90.0C
> hw.acpi.thermal.tz0._TC1: -1
> hw.acpi.thermal.tz0._TC2: -1
> hw.acpi.thermal.tz0._TSP: -1
> 
> output from:
>  sysctl -a |grep acpi
> is here: https://privatepaste.com/ca08d4658b

I suspect it is still there, but sysctl doesn't know how to display it 
anymore.  This is probably due to the changes with formatting of sysctl 
information.  mdf@ is probably responsible in that case.

    SYSCTL_ADD_OPAQUE(&sc->tz_sysctl_ctx, SYSCTL_CHILDREN(sc->tz_sysctl_tree),
		      OID_AUTO, "temperature", CTLFLAG_RD, &sc->tz_temperature,
		      sizeof(sc->tz_temperature), "IK",
		      "current thermal zone temperature");

-- 
John Baldwin