Installation § sudo apt update sudo apt upgrade -y sudo reboot sudo sed -i 's/bullseye/bookworm/g' /etc/apt/sources.list sudo apt upgrade --without-new-pkgs sudo apt full-upgrade Troubleshooting § Linux kernel build error: return code 11 dkms error § sudo dpkg --purge <*-dkms> && sudo apt -f install # should find what package is occurring error # read logs # my case, /var/libs/dkms/kernel-mft-dkms/4.18.0/build/make.log # sudo dpkg --purge kernel-mft-dkms && sudo apt -f install resolved the error