On Fri, Nov 19, 2021 at 01:58:20PM +0100, Jan Stary wrote:
> This is current/amd64 on a Thinkpad T400
> (full dmesg and sysctl hw below).
>
> It provides various sensors reporting temperatures,
> but I don't really know what temperatures these are.
>
> $ sysctl hw | grep temp
>
> hw.sensors.cpu0.temp0=39.00 degC
> hw.sensors.acpithinkpad0.temp0=48.00 degC
> hw.sensors.acpithinkpad0.temp1=41.00 degC
> hw.sensors.acpithinkpad0.temp2=34.00 degC
> hw.sensors.acpithinkpad0.temp4=25.00 degC
> hw.sensors.acpithinkpad0.temp6=25.00 degC
> hw.sensors.acpitz0.temp0=48.00 degC (zone temperature)
> hw.sensors.acpitz1.temp0=44.00 degC (zone temperature)
> hw.sensors.aps0.temp0=255.00 degC
> hw.sensors.aps0.temp1=255.00 degC
> ...
Hi Jan,
There is some (emperically derived) info. about the hardware here:
https://www.thinkwiki.org/wiki/Thermal_Sensors#ThinkPad_T400
And:
https://www.sthu.org/misc/t400.html
E.g.
Index in "thermal" Location
1 CPU neighbourhood (also via ACPI THM0)
2 Ultrabay
3 Express card
4 ATI graphics module
5 Main battery (always around 50°C)
6 n/a (probably ultrabay battery)
7 Main Battery (fits about the value reported by smapi)
8 n/a (probably ultrabay battery)
9 Hard disc
10 Intel graphics module
11 Heatsink?
Those numbers are the indicies into the Linux thinkpad_acpi kernel
module, made available via '/proc/acpi/ibm/thermal'
Maybe that helps.
Cheers,
Robb.
