Temperature AMD 7800X3D on Linux

[chrizdeluxe]

Hi,
I'm just starting to tinkering around with themes and i recognized that the CPU temperature from my CPU is not showing correctly.

I think its not a real issue so i post it here first.

Its showing the Tctl instead of the Tccd1.
Tctl has as far as i know an offset and its not the real temperature of the CPU.
On older AMD CPUs there is a Tdie on the first position.

This is the output of lm_sensors, i think psutil get this in the same order.

k10temp-pci-00c3
Adapter: PCI adapter
Tctl: +45.5°C
Tccd1: +41.6°C

After some research in the code i found where the CPU temperature is read and its the first position.

turing-smart-screen-python/library/sensors/sensors_python.py

Lines 85 to 94 in d44505f

	@staticmethod
	def temperature() -> float:
	cpu_temp = 0
	sensors_temps = psutil.sensors_temperatures()
	if 'coretemp' in sensors_temps:
	# Intel CPU
	cpu_temp = sensors_temps['coretemp'][0].current
	elif 'k10temp' in sensors_temps:
	# AMD CPU
	cpu_temp = sensors_temps['k10temp'][0].current

My temporarily solution is to edit line 94 to
cpu_temp = sensors_temps['k10temp'][1].current

Does somebody know if there is no Tdie for the newer AMD CPUs or am i missing something to see the Tdie?
I'm running Kernel 6.6.1-arch1-1

Beside that 'issue' it runs pretty good, thanks for your great work.

[marcosins]

My 7800x3D too doesn't report Tdie sensor

$ uname -mr && sensors && lscpu -J | jq '.["lscpu"][7].data'
6.8.0-49-generic x86_64
(...)
k10temp-pci-00c3
Adapter: PCI adapter
Tctl:         +47.1°C  
Tccd1:        +42.6°C  

"AMD Ryzen 7 7800X3D 8-Core Processor"

Edit: found this extract from the 5.15 release¹²

Other notable changes:

• In k10temp, do not display Tdie on Zen CPUs if there is no difference between Tdie and Tctl

Footnotes

1. https://lkml.iu.edu/hypermail/linux/kernel/2108.3/06462.html#:~:text=difference%20between%20Tdie%20and%20Tctl ↩

2. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e7c1bbcf0c315c56cd970642214aa1df3d8cf61d ↩