See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=759745
... I, at least, experience both symptoms at the same time (unable to log in with gdm3 until installing systemd-sysv and unable to change wireless). Happy to provide more info. -p -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
