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disable-c6

A systemd service to disable the C6 state upon system boot, preventing Ryzen freezes. Here is some info on the bug.

This simply installs zenstates.py from ZenStates-Linux and creates a one-shot service based on it.

Prerequisites

The zenstates.py script requires the msr kernel module. Ensure that you're either loading the msr module at startup or have it compiled into the kernel. If /dev/cpu/*/msr exists, then your msr module is active.

Refer to your specific distribution and init system to find out how to load kernel modules. For instance, if you're using systemd, refer to man modules-load.d.

Installation

Arch Linux

This package is available on the AUR as disable-c6-systemd. Use your preferred AUR install method. For instance, using yay to install:

yay -S disable-c6-systemd
sudo systemctl enable disable-c6.service
sudo systemctl start disable-c6.service

Others

git clone https://github.com/jfredrickson/disable-c6.git
cd disable-c6
git submodule init
git submodule update
sudo ./install.sh

This will install a systemd unit called disable-c6 to the default location, /usr/local/lib/systemd/system/disable-c6.service, and offer to enable/start the service for you.

You can also customize the install location. See ./install.sh --help for options.

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A systemd service to disable the C6 state upon system boot, preventing Ryzen freezes.

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