disable-c6-runit

A runit service for disabling the C6 power saving state on AMD Zen (Ryzen/Epyc) processors upon boot. The C6 state is known for causing soft lock freezing behaviour on Linux.

Dependencies

• zenstates.py installed in your PATH as zenstates (installing zenstates-git from the AUR will provide this)

Installation

Package Managers

Arch

This is on the AUR at disable-c6-runit-git. Either install it using your favourite AUR helper, or install the package without a helper:

$ git clone https://aur.archlinux.org/disable-c6-runit-git.git
$ cd disable-c6-runit-git
$ makepkg -si

Manual Installation

Clone the repo:

$ git clone --depth=1 https://codeberg.org/revsuine/disable-c6-runit.git
$ cd disable-c6-runit

Copy the disable-c6/ folder to wherever you store your runit services, e.g. for where Artix keeps their folders:

# cp -r disable-c6 /etc/runit/sv

For Void:

# cp -r disable-c6 /etc/sv

Enabling the Service

Symlink the service directory to your enabled services directory as usual. This varies by distro.

Void Linux

# ln -s /etc/sv/disable-c6 /var/service

Artix Linux

# ln -s /etc/runit/sv/disable-c6 /run/runit/service

Debian

# ln -s /etc/runit/disable-c6 /etc/service

Disabling the Service

Break the symlink:

# unlink /var/service/disable-c6

Or wherever your service directory is.