I feel like this may be due to recent changes in init system.
Try to use systemd as describe in https://wiki.debian.org/systemd, it solved the issue for me.
Without this - i've been having a lot of issue (with gdm and group permissions).
Sylvain -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org