Hi, rtkit (0.13-3) entered Debian/testing and the systemd unit file is still at the wrong place. testing: /usr/lib/x86_64-linux-gnu/systemd/system/rtkit-daemon.service buster: /lib/systemd/system/rtkit-daemon.service Sometimes it needs 3+1 attempts :-). Bonne chance, - Sedat - [1] https://packages.debian.org/bullseye/amd64/rtkit/filelist [2] https://packages.debian.org/buster/amd64/rtkit/filelist