Undervolting linux ubuntu 18.04 (XPS 9570 i9 32GB RAM)

gistfile1.txt

Very useful for the i9 XPS 9570 overheating on Linux. Since I use Linux for development, I don't use the nvidia that comes
with the note and also don't need turboboost enabled, even running dozens of docker containers. I was having problems with
temperature. Notebook was getting so hot it was hard to type for more than 4 hours straight.

Here are my temperatures before undevolting:

phackwer@phackwer-XPS-15-9570 ~/P/p/poc> sensors
coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +53.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +52.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +52.0°C  (high = +100.0°C, crit = +100.0°C)
Core 2:        +53.0°C  (high = +100.0°C, crit = +100.0°C)
Core 3:        +53.0°C  (high = +100.0°C, crit = +100.0°C)
Core 4:        +51.0°C  (high = +100.0°C, crit = +100.0°C)
Core 5:        +51.0°C  (high = +100.0°C, crit = +100.0°C)

acpitz-virtual-0
Adapter: Virtual device
temp1:        +25.0°C  (crit = +107.0°C)

pch_cannonlake-virtual-0
Adapter: Virtual device
temp1:        +63.0°C  

And now, after undervolting, fresh reboot, almost nothing running:

phackwer@phackwer-XPS-15-9570 ~> sensors
coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +35.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +34.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +34.0°C  (high = +100.0°C, crit = +100.0°C)
Core 2:        +35.0°C  (high = +100.0°C, crit = +100.0°C)
Core 3:        +35.0°C  (high = +100.0°C, crit = +100.0°C)
Core 4:        +34.0°C  (high = +100.0°C, crit = +100.0°C)
Core 5:        +33.0°C  (high = +100.0°C, crit = +100.0°C)

acpitz-virtual-0
Adapter: Virtual device
temp1:        +25.0°C  (crit = +107.0°C)

pch_cannonlake-virtual-0
Adapter: Virtual device
temp1:        +33.0°C  

Temperatures with undervolting after I start all my processes for a normal coding day (Docker - at least 6 instances per 
project, Intellij Idea, DBeaver, Terminator, Chrome, Franz, Mailspring, Gnome Calendar, etc, etc)

phackwer@phackwer-XPS-15-9570 ~/P/p/platform> sensors
coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +44.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 2:        +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 3:        +45.0°C  (high = +100.0°C, crit = +100.0°C)
Core 4:        +44.0°C  (high = +100.0°C, crit = +100.0°C)
Core 5:        +43.0°C  (high = +100.0°C, crit = +100.0°C)

===================================================

EASIEST WAY TO DO IT:

You will install msr-tools and pip to get undervolt (https://github.com/georgewhewell/undervolt) working:

$ sudo apt-get install msr-tools python3-pip
$ sudo pip3 install undervolt

And add to your rc.local or whatever boot start scripts you use:

/home/{$USER}/.local/bin/undervolt --core -125 --cache -125 --gpu -125

-125 has been proven a nice value to undervolt those 3 processors in your computer.