> Maybe it has to do with desktop-file-utils? kmix from bullseye/sid installs, among others:
/etc/xdg/autostart/kmix_autostart.desktop /etc/xdg/autostart/restore_kmix_volumes.desktop On my system, I have me@box:/etc/xdg/autostart$ ls -lh .. lrwxrwxrwx 1 root root 43 18. Okt 2016 kmix_autostart.desktop -> /usr/ share/autostart/kmix_autostart.desktop -rw-r--r-- 1 root root 3,0K 11. Nov 10:35 kmix_autostart.desktop.dpkg-new ... lrwxrwxrwx 1 root root 49 18. Okt 2016 restore_kmix_volumes.desktop -> / usr/share/autostart/restore_kmix_volumes.desktop -rw-r--r-- 1 root root 2,6K 11. Nov 10:35 restore_kmix_volumes.desktop.dpkg- new ... The links to /usr/share/autostart are missing their targets. They were originally installed with stretch: https://packages.debian.org/stretch/amd64/kmix/filelist Cheers, Johannes