Package: debian-policy Severity: normal Policy 11.8.4 documents how to set the priority for an x-window-manager alternative. The algorithm for doing so increases the priority for window managers supporting the Debian menu system, but doesn't say anything about the freedesktop menu system. (And, for that matter, the algorithm seems to treat a window manager as a "session"; Policy should probably mention the x-session-manager alternative, and /usr/share/xsessions.)
-- System Information: Debian Release: stretch/sid APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 4.7.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system)