KCM for Universal Blue images

Installation

This is now included in Aurora by default. The following instructions are to install the latest development version.

Via layering

curl -L https://copr.fedorainfracloud.org/coprs/ledif/kcm_ublue/repo/fedora-41/ledif-kcm_ublue-fedora-41.repo | \
  sudo tee /etc/yum.repos.d/_copr_ledif_kcm_ublue.repo
dnf install kcm_ublue

Via sysext

Warning

Installing a sysext with SELinux enabled can lead to an unstable system. Before installing this extension, please first verify that SELinux is set to permissive in /etc/selinux/config. If it is set to "enforcing," change it to "permissive" and reboot before continuing.

These instructions will create a temporary installation using a sysext placed in /run/extensions. These changes are ephemeral and will not persist across reboots.

Download and install the kcm_ublue system extension:

wget https://github.com/ledif/kcm_ublue/releases/download/aurora-41-x86-64/kcm_ublue.raw
sudo install -d -m 0755 -o 0 -g 0 /run/extensions/
sudo restorecon -RFv /run/extensions/
sudo install -m 644 -o 0 -g 0 kcm_ublue.raw /run/extensions/kcm_ublue.raw
sudo systemctl restart systemd-sysext.service

Verify that the sysext is loaded:

> systemd-sysext status
HIERARCHY EXTENSIONS    SINCE                      
/opt      none          -                          
/usr      kcm_ublue   Sun 2025-01-12 13:24:25 CST

Then, either manually launch the System Settings application and scroll to the bottom, or launch it directly with systemsettings kcm_ublue.

Development

Tested on Aurora 41 Developer Experience.

To build and run:

just build
just install
just run

This will create a sysext in /run/extensions. This is an ephemeral installation and will be removed upon reboot.