Update recipe.yml

fix for kernel issues

files/scripts/bazzite-kernel.sh

@@ -0,0 +1,89 @@
+#!/usr/bin/env bash
+# Replaces the stock Fedora kernel with the Bazzite kernel.
+# The Bazzite kernel ships sched-ext (SCX) support and gaming/realtime
+# optimizations, making it well-suited for low-latency audio workloads.
+#
+# Based on the solarpowered project kernel install approach:
+# https://github.com/solar-powered/solarpowered
+
+set -ouex pipefail
+
+OS_VERSION=$(rpm -E %fedora)
+VER=$(basename "$(curl -Ls -o /dev/null -w '%{url_effective}' https://github.com/bazzite-org/kernel-bazzite/releases/latest)")
+
+# Verify we got a valid version string
+if [[ -z "$VER" ]]; then
+    echo "ERROR: Failed to determine latest bazzite kernel version" >&2
+    exit 1
+fi
+echo "Bazzite kernel version: ${VER}"
+
+# Disable kernel-install hooks so they don't trigger inside the container
+# build environment. The initramfs will be generated explicitly below.
+mkdir -p /usr/lib/kernel/install.d
+pushd /usr/lib/kernel/install.d
+printf '%s\n' '#!/bin/sh' 'exit 0' >05-rpmostree.install
+printf '%s\n' '#!/bin/sh' 'exit 0' >50-dracut.install
+chmod +x 05-rpmostree.install 50-dracut.install
+popd
+
+# Erase stock Fedora kernel RPMs from the package database (matches Bazzite's approach)
+for pkg in kernel kernel-core kernel-modules kernel-modules-core kernel-modules-extra kernel-tools-libs kernel-tools; do
+  rpm --erase "$pkg" --nodeps || true
+done
+
+# Remove ALL existing kernel module directories.
+rm -rf /usr/lib/modules
+
+# Create /boot/grub2 so grub2 RPM scriptlets don't fail in the container
+# build environment. It gets removed by the rm -rf /boot/* below.
+mkdir -p /boot/grub2
+
+echo "Installing Bazzite kernel ${VER}..."
+dnf5 install -y \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-$VER.fc$OS_VERSION.x86_64.rpm \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-common-$VER.fc$OS_VERSION.x86_64.rpm \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-core-$VER.fc$OS_VERSION.x86_64.rpm \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-devel-$VER.fc$OS_VERSION.x86_64.rpm \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-devel-matched-$VER.fc$OS_VERSION.x86_64.rpm \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-modules-$VER.fc$OS_VERSION.x86_64.rpm \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-modules-akmods-$VER.fc$OS_VERSION.x86_64.rpm \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-modules-core-$VER.fc$OS_VERSION.x86_64.rpm \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-modules-extra-$VER.fc$OS_VERSION.x86_64.rpm \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-modules-extra-matched-$VER.fc$OS_VERSION.x86_64.rpm \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-modules-internal-$VER.fc$OS_VERSION.x86_64.rpm \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-tools-$VER.fc$OS_VERSION.x86_64.rpm \
+    https://github.com/bazzite-org/kernel-bazzite/releases/download/$VER/kernel-tools-libs-$VER.fc$OS_VERSION.x86_64.rpm
+
+# Identify the newly installed Bazzite kernel version
+NEW_KVER=$(ls /usr/lib/modules | head -n1)
+
+# Ensure vmlinuz is at the path expected by rpm-ostree and bootc for boot
+# entry generation.
+if [ ! -f "/usr/lib/modules/${NEW_KVER}/vmlinuz" ]; then
+  if [ -f "/boot/vmlinuz-${NEW_KVER}" ]; then
+    cp "/boot/vmlinuz-${NEW_KVER}" "/usr/lib/modules/${NEW_KVER}/vmlinuz"
+  else
+    echo "ERROR: vmlinuz not found for kernel ${NEW_KVER}" >&2
+    exit 1
+  fi
+fi
+
+# Rebuild kernel module dependency map before generating initramfs.
+depmod -a "${NEW_KVER}"
+
+# Generate the initramfs inside the container image so that rpm-ostree and
+# bootc can use it directly at deploy time.
+dracut \
+  --no-hostonly \
+  --kver "${NEW_KVER}" \
+  --reproducible \
+  --zstd \
+  -v \
+  --add ostree \
+  --force \
+  "/usr/lib/modules/${NEW_KVER}/initramfs.img"
+
+# Atomic images manage /boot via the bootloader layer; clear any kernel
+# files the RPM dropped there.
+rm -rf /boot/*

files/scripts/branding.sh

@@ -1,6 +1,14 @@
 #!/usr/bin/env bash
 
 set -oue pipefail
+
+# Fix boot entry title and OS identity
+sed -i 's|^PRETTY_NAME=.*|PRETTY_NAME="Miasma OS"|' /usr/lib/os-release
+sed -i 's|^NAME=.*|NAME="Miasma OS"|' /usr/lib/os-release
+sed -i 's|^ID=.*|ID=miasma-os|' /usr/lib/os-release
+sed -i 's|^ID_LIKE=.*|ID_LIKE=fedora|' /usr/lib/os-release
+sed -i 's|^LOGO=.*|LOGO=distributor-logo|' /usr/lib/os-release
+
 mv /tmp/files/assets/images/distributor-logo.svg /usr/share/icons/hicolor/scalable/places/distributor-logo.svg
 mv /tmp/files/assets/splash/default.jxl /usr/share/backgrounds/default.jxl
 mv /tmp/files/assets/splash/default-dark.jxl /usr/share/backgrounds/default-dark.jxl
@@ -17,3 +25,16 @@ mv /tmp/files/assets/images/fedora_logo_med.png /usr/share/pixmaps/fedora_logo_m
 mv /tmp/files/assets/images/fedora_whitelogo.svg /usr/share/pixmaps/fedora_whitelogo.svg
 mv /tmp/files/assets/images/fedora_whitelogo_med.png /usr/share/pixmaps/fedora_whitelogo_med.png
 mv /tmp/files/assets/images/system-logo-white.png /usr/share/pixmaps/system-logo-white.png
+
+# Replace EFI boot picker icon (shown before SDDM) with Miasma OS logo
+mkdir -p /usr/share/pixmaps/bootloader
+python3 -c "
+import struct
+with open('/usr/share/pixmaps/system-logo-white.png', 'rb') as f:
+    png_data = f.read()
+# ICNS format: embed PNG data directly using ic09 (512x512) slot
+entry = b'ic09' + struct.pack('>I', 8 + len(png_data)) + png_data
+icns = b'icns' + struct.pack('>I', 8 + len(entry)) + entry
+with open('/usr/share/pixmaps/bootloader/fedora.icns', 'wb') as f:
+    f.write(icns)
+"

files/scripts/cachyos-kernel.sh

@@ -0,0 +1,82 @@
+#!/usr/bin/env bash
+# Replaces the stock Fedora kernel with the CachyOS LTO kernel.
+# CachyOS LTO kernel is compiled with Link-Time Optimization and ships
+# sched-ext (SCX) support, giving lower latency for realtime audio workloads.
+#
+# Adapted from the Zena project (https://github.com/zena-linux/zena),
+# specifically build-scripts/modules/base/kernel.sh.
+# Zena is licensed under the Apache License 2.0.
+# Credit to the Zena contributors: https://github.com/zena-linux/zena/graphs/contributors
+
+set -ouex pipefail
+
+shopt -s nullglob
+
+KERNEL_PACKAGES=(
+  kernel-cachyos-lto
+  kernel-cachyos-lto-core
+  kernel-cachyos-lto-devel-matched
+  kernel-cachyos-lto-modules
+)
+
+# Disable kernel-install hooks so they don't trigger inside the container
+# build environment. The initramfs will be generated explicitly below.
+pushd /usr/lib/kernel/install.d
+printf '%s\n' '#!/bin/sh' 'exit 0' >05-rpmostree.install
+printf '%s\n' '#!/bin/sh' 'exit 0' >50-dracut.install
+chmod +x 05-rpmostree.install 50-dracut.install
+popd
+
+# Erase stock Fedora kernel RPMs from the package database
+for pkg in kernel kernel-core kernel-modules kernel-modules-core; do
+  rpm --erase "$pkg" --nodeps || true
+done
+
+# Remove ALL existing kernel module directories. The original script used
+# `head -n1` which only removed the first entry — on Kinoite's base image
+# there are typically two kernel versions, leaving an orphaned module
+# directory that confuses rpm-ostree/bootc at deploy time.
+for KVER in $(ls /usr/lib/modules 2>/dev/null); do
+  rm -rf "/usr/lib/modules/$KVER"
+done
+
+dnf5 -y install "${KERNEL_PACKAGES[@]}"
+
+dnf5 versionlock add "${KERNEL_PACKAGES[@]}" || true
+
+# Identify the newly installed CachyOS kernel version
+NEW_KVER=$(ls /usr/lib/modules | head -n1)
+
+# Ensure vmlinuz is at the path expected by rpm-ostree and bootc for boot
+# entry generation. Some COPR kernel RPMs only install vmlinuz to /boot and
+# not to /usr/lib/modules/<kver>/vmlinuz; copy it over if missing.
+if [ ! -f "/usr/lib/modules/${NEW_KVER}/vmlinuz" ]; then
+  if [ -f "/boot/vmlinuz-${NEW_KVER}" ]; then
+    cp "/boot/vmlinuz-${NEW_KVER}" "/usr/lib/modules/${NEW_KVER}/vmlinuz"
+  else
+    echo "ERROR: vmlinuz not found for kernel ${NEW_KVER}" >&2
+    exit 1
+  fi
+fi
+
+# Rebuild kernel module dependency map before generating initramfs.
+depmod -a "${NEW_KVER}"
+
+# Generate the initramfs inside the container image so that rpm-ostree and
+# bootc can use it directly at deploy time. Without this step, Kinoite boots
+# with no initramfs and hits a dracut emergency shell (the "wall of errors").
+#   --no-hostonly : include all drivers, not just the CI build host's hardware
+#   --add ostree  : include the ostree dracut module for atomic deployments
+dracut \
+  --reproducible \
+  --no-hostonly \
+  --add "ostree" \
+  --filesystems "btrfs" \
+  --add-drivers "btrfs" \
+  --force \
+  "/usr/lib/modules/${NEW_KVER}/initramfs.img" \
+  "${NEW_KVER}"
+
+# Atomic images manage /boot via the bootloader layer; clear any kernel
+# files the RPM dropped there.
+rm -rf /boot/*

recipes/common/copr-packages.yml

@@ -2,6 +2,7 @@ modules:
   - type: dnf
     repos:
       copr:
+        - bieszczaders/kernel-cachyos-addons
         - patrickl/wine-tkg
         - timlau/audio
         - alternateved/eza

recipes/common/fedora-packages.yml

@@ -1,7 +1,23 @@
 modules:
+  - type: dnf
+    remove:
+      packages:
+        - zram-generator-defaults
+
   - type: dnf
     install:
       packages:
+        # CachyOS kernel performance companion packages
+        # cachyos-settings: kernel tunables and sysctl optimisations from CachyOS
+        # cachyos-ksm-settings: Kernel Samepage Merging tuning (reduces RAM usage)
+        # scx-manager / scx-scheds / scx-tools: sched-ext schedulers;
+        #   scx_lavd is ideal for low-latency realtime audio workloads
+        - cachyos-settings
+        - cachyos-ksm-settings
+        - scx-manager
+        - scx-scheds-git
+        - scx-tools-git
+
         # useful tools
         - zsh
         - openssl
@@ -12,7 +28,6 @@ modules:
         - alacritty
         - ripgrep
         - fd-find
-        - realtime-setup
         - zoxide
         - fzf
 

recipes/recipe.yml

@@ -3,13 +3,34 @@
 # image will be published to ghcr.io/<user>/<name>
 name: miasma-os
 # description will be included in the image's metadata
-description: An personal spin based on Bazzite targeted towards musicians and music producers inspired by Fedora Jam
+description: An KDE based Universal Blue image targeted towards musicians and music producers inspired by Fedora Jam
 
 # the base image to build on top of (FROM) and the version tag to use
-base-image: ghcr.io/ublue-os/bazzite
-image-version: latest # latest is also supported if you want new updates ASAP
+base-image: ghcr.io/ublue-os/aurora
+image-version: latest
 
 modules:
+  # Swap stock Fedora kernel for Bazzite kernel
+  - type: script
+    scripts:
+      - bazzite-kernel.sh
+
+  # Install SCX scheduler (works with Bazzite kernel's sched-ext support)
+  - type: dnf
+    repos:
+      copr:
+        - bieszczaders/kernel-cachyos-addons
+    install:
+      install-weak-deps: false
+      packages:
+        - scx-scheds-git
+        - scx-manager
+
+  - type: systemd
+    system:
+      enabled:
+        - scx_loader.service
+
   - type: dnf
     install:
       packages: