2990WX Linux Patches

Until Kernel 4.18.6 is released with the k10temp patch, Threadripper thermals will be mis-reported by 27c. Building a custom Kernel module will fix the issue temporarily.

This specifically patches thermal detection for the Gigabyte X399 Aorus Extreme for Ubuntu, but most likely will easily translate to other distros and motherboards.

Install Build Tools

Add deb-src lines for distribution sources in /etc/apt (just duplicate the deb line and add deb-src).

Add deb-src to apt and install build tools, Kernel dependencies.

apt update && apt upgrade
apt install build-essential bison flex linux-headers lm-sensors
apt build-dep linux

Clone patched IT87 Kernel Driver

The original Kernel IT87 driver was removed by the original author when he couldn’t keep up with requests anymore. Pull from a clone of that repository with the AMD patches built in. This will build and install the module for your current Kernel.

git clone https://github.com/rpavlik/it87
cd it87
make clean
make
make install

Note

https://github.com/Road-Drum/it87 contains a unmodified fork of original it87.

Force Detection of Module

Both the IT8792E and IT8795E have the same ID, so we need to force module installation and ignore conflicts.

Install it87 module and show sensor data.

modprobe it87 ignore_resource_conflict=1
sensors-detect
sensors | grep -i amd

sensors-detect can be run with all default values.
See Reading Sensors for a breakdown of sensors for the X399 Aorus board.
If a line is returned, then you are correctly reading Threadripper thermal temperatures.

Load Module on Boot

Add the module load line for ramfs and update it.

0644 root root /etc/initramfs/modules

...
it87 ignore_resource_conflict=1

sudo update-initramfs -u

Important

Any new Kernel installed will require a new build of this module.

Reading Sensors

Be sure to read the correct chipset to find the right sensor values. Labels are according to the board layout diagram in the manual.

sensors

it8792-isa-0a60.

in0:          +1.19 V  (min =  +0.00 V, max =  +2.78 V)
in1:          +1.50 V  (min =  +0.00 V, max =  +2.78 V)
in2:          +1.05 V  (min =  +0.00 V, max =  +2.78 V)
in3:          +2.02 V  (min =  +0.00 V, max =  +2.78 V)
in4:          +1.80 V  (min =  +0.00 V, max =  +2.78 V)
in5:          +1.50 V  (min =  +0.00 V, max =  +2.78 V)
in6:          +2.78 V  (min =  +0.00 V, max =  +2.78 V)
3VSB:         +3.33 V  (min =  +0.00 V, max =  +5.56 V)
Vbat:         +3.21 V
fan1:           0 RPM  (min =    0 RPM)
fan2:           0 RPM  (min =    0 RPM)
fan3:           0 RPM  (min =    0 RPM)
temp1:        +43.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
temp2:        -55.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
temp3:        +41.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor

it8792 Fan Mapping

Layout Name	Sensor Name
fan1	SYS_FAN5_PUMP
fan2	SYS_FAN6_PUMP
fan3	SYS_FAN4

it8686-isa-0a40.

in0:          +0.77 V  (min =  +0.00 V, max =  +3.06 V)
in1:          +2.00 V  (min =  +0.00 V, max =  +3.06 V)
in2:          +2.03 V  (min =  +0.00 V, max =  +3.06 V)
in3:          +2.00 V  (min =  +0.00 V, max =  +3.06 V)
in4:          +1.19 V  (min =  +0.00 V, max =  +3.06 V)
in5:          +0.88 V  (min =  +0.00 V, max =  +3.06 V)
in6:          +1.20 V  (min =  +0.00 V, max =  +3.06 V)
3VSB:         +3.24 V  (min =  +0.00 V, max =  +6.12 V)
Vbat:         +3.12 V
fan1:         432 RPM  (min =   10 RPM)
fan2:           0 RPM  (min =    0 RPM)
fan3:        1506 RPM  (min =    0 RPM)
fan4:         703 RPM  (min =    0 RPM)
fan5:           0 RPM  (min =    0 RPM)
temp1:        +40.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
temp2:        +53.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
temp3:        +36.0°C  (low  =  +0.0°C, high = +90.0°C)  sensor = AMD AMDSI
temp4:        +44.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
temp5:        +49.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
temp6:        -55.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor

it8686 Fan Mapping

Layout Name	Sensor Name
fan1	CPU_FAN
fan2	SYS_FAN1
fan3	SYS_FAN2 (Built in VRM fans).
fan4	SYS_FAN3
fan5	CPU_OPT
temp3	Threadripper CPU temp (AMD AMDSI).

Note

SYS_FAN2 is unlisited in manual.

Building Kernel 4.18.6+

If you would rather install a later Kernel, be aware that this will not be auto upgraded, and you’ll need to install additional packages for Kernel support such as ZFS (e.g. zfs-dkms spl-dkms). These are essentially Vanilla Kernels for Ubuntu with core patches. You will need at least Kernel 4.18.6.

Determine your platform and grab Kernel 4.18.6 source with ubuntu pataches. Any recent 64bit CPU will be amd64. You only need the generic Kernel.

Download ubuntu Kernel 4.18.6 package and install.

wget http://Kernel.ubuntu.com/~Kernel-ppa/mainline/v4.18.6/linux-headers-4.18.6-041806_4.18.6-041806.201809050847_all.deb
wget http://Kernel.ubuntu.com/~Kernel-ppa/mainline/v4.18.6/linux-headers-4.18.6-041806-generic_4.18.6-041806.201809050847_amd64.deb
wget http://Kernel.ubuntu.com/~Kernel-ppa/mainline/v4.18.6/linux-image-unsigned-4.18.6-041806-generic_4.18.6-041806.201809050847_amd64.deb
wget http://Kernel.ubuntu.com/~Kernel-ppa/mainline/v4.18.6/linux-modules-4.18.6-041806-generic_4.18.6-041806.201809050847_amd64.deb
dpkg -i linux-headers*all.deb
dpkg -i linux-headers*amd64.deb
dpkg -i linux-modules*amd64.deb
dpkg -i linux-image*amd64.deb

Load the updated Kernel module and Add to ramfs:

modprobe k10temp

0644 root root /etc/initramfs/modules

...
k10temp

sudo update-initramfs -u

References