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#1 2018-06-06 21:21:50

Registered: 2017-01-27
Posts: 9

High PCH temperature reported - Cannonlake/Coffeelake

I just bought a Asus ROG Strix GL503GE laptop. lm_sensors is reporting 10 degrees higher temperature for the PCH than what I get on windows with hwinfo/hwmonitor
Windows 10 : 50-52 degrees Celsius
Linux: 60-63 degrees Celsius
Now I am wondering if this could be a bug with lm_sensors or is the PCH really running hotter with the linux kernel.
The laptop sports an i7-8750H running on Intel HM370 (Cannon Lake-H)

CPU on the other hand, runs around 45-47 degrees celsius same as Windows. It is the PCH temperature thats bothering me.
The laptop has an optimus setup with dual GPUs. But I don't intend on using the Nvidia GPU on linux and have switched that one off using bbswitch.
I know coffeelake is pretty new and at times hardware support in Linux takes a while to catch up.
Just wanted to check in and see anybody had similar experience with Coffeelake.
Any thoughts ?


#2 2018-07-03 23:13:21

From: Brazil
Registered: 2012-01-08
Posts: 5

Re: High PCH temperature reported - Cannonlake/Coffeelake

I having the same problem.

Adapter: Virtual device
temp1:        +79.0°C  

Adapter: Virtual device
temp1:        +43.0°C  (crit = +120.0°C)

Adapter: Virtual device
temp1:        +49.0°C  

Adapter: ISA adapter
Package id 0:  +43.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +41.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +43.0°C  (high = +100.0°C, crit = +100.0°C)
Core 2:        +42.0°C  (high = +100.0°C, crit = +100.0°C)
Core 3:        +40.0°C  (high = +100.0°C, crit = +100.0°C)
Core 4:        +40.0°C  (high = +100.0°C, crit = +100.0°C)
Core 5:        +42.0°C  (high = +100.0°C, crit = +100.0°C)

And the fan speed don't increase when the temperature is high.
Any help?


#3 2018-07-04 06:55:00

Registered: 2012-09-03
Posts: 24,890

Re: High PCH temperature reported - Cannonlake/Coffeelake

I'd say that the GPU is not actually deactivated?
"Activate" it, load the nvidia driver (or just use optirun, denepnding on your setup) and check the GPU temp.

nvidia-smi --format=csv,noheader --query-gpu="temperature.gpu"


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