Re: `hw.acpi.thermal.tz0.temperature' disappeared

2011/4/16 Nick Ulen <uncle_at_wolfman.devio.us>:
> FreeBSD was successfully upgraded.
>
> uname -v
> FreeBSD 9.0-CURRENT #0: Mon Apr 11 18:14:36 MSD 2011
> root_at_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
>
> CPU (From /var/run/dmesg.boot): https://privatepaste.com/d107389cc1
>
> Why is this so and how can it be changed?
> How is it possible to monitor CPU temperature now?

If you have an Intel CPU (according to coretemp manpage), you can use
coretemp module:

# kldload coretemp
# sysctl -a | grep temp
[...]
dev.cpu.0.temperature: 84.0C
dev.cpu.1.temperature: 85.0C
dev.coretemp.0.%desc: CPU On-Die Thermal Sensors
dev.coretemp.0.%driver: coretemp
dev.coretemp.0.%parent: cpu0
dev.coretemp.1.%desc: CPU On-Die Thermal Sensors
dev.coretemp.1.%driver: coretemp
dev.coretemp.1.%parent: cpu1

If you're using an AMD CPU, the right module seems to be amdtemp.

Regards,
Romain