Bug#759745: gdm3: Unable to login post-upgrade without systemd-sysv installed

[Jeremy T. Bouse]

Package: gdm3
Version: 3.12.2-2.1
Severity: grave
Justification: renders package unusable

Performed routine aptitude upgrade and had new version of gdm installed.
Shutdown laptop and upon restart was no longer presented with the login
greeter. Gnome environment would work by getting to shell and running
startx but was presented with a systemd-login error on the console shell
when logging in. Installed systemd-sysv which purged sysinit-core, rebooted
and the system was once again usable.

Suggest that there is a dependency not properly resolving in there to
ensure that systemd is running as PID 1.


-- System Information:
Debian Release: jessie/sid
  APT prefers testing-updates
  APT policy: (500, 'testing-updates'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.14-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gdm3 depends on:
ii  accountsservice                              0.6.37-3
ii  adduser                                      3.113+nmu3
ii  dconf-cli                                    0.20.0-2
ii  dconf-gsettings-backend                      0.20.0-2
ii  debconf [debconf-2.0]                        1.5.53
ii  gir1.2-gdm3                                  3.12.2-2.1
ii  gnome-session [x-session-manager]            3.12.1-3
ii  gnome-session-bin                            3.12.1-3
ii  gnome-session-flashback [x-session-manager]  3.8.1-1
ii  gnome-settings-daemon                        3.12.2-1
ii  gnome-shell                                  3.12.2-3
ii  gnome-terminal [x-terminal-emulator]         3.12.3-2
ii  gsettings-desktop-schemas                    3.12.2-1
ii  libaccountsservice0                          0.6.37-3
ii  libatk1.0-0                                  2.12.0-1
ii  libaudit1                                    1:2.3.7-1
ii  libc6                                        2.19-9
ii  libcairo-gobject2                            1.12.16-2
ii  libcairo2                                    1.12.16-2
ii  libcanberra-gtk3-0                           0.30-2
ii  libcanberra0                                 0.30-2
ii  libgdk-pixbuf2.0-0                           2.30.7-1
ii  libgdm1                                      3.12.2-2.1
ii  libglib2.0-0                                 2.40.0-4
ii  libglib2.0-bin                               2.40.0-4
ii  libgtk-3-0                                   3.12.2-3
ii  libpam-modules                               1.1.8-3.1
ii  libpam-runtime                               1.1.8-3.1
ii  libpam-systemd                               208-8
ii  libpam0g                                     1.1.8-3.1
ii  libpango-1.0-0                               1.36.6-1
ii  libpangocairo-1.0-0                          1.36.6-1
ii  librsvg2-common                              2.40.3-1
ii  libselinux1                                  2.3-1
ii  libsystemd-daemon0                           208-8
ii  libsystemd-id128-0                           208-8
ii  libsystemd-journal0                          208-8
ii  libsystemd-login0                            208-8
ii  libwrap0                                     7.6.q-25
ii  libx11-6                                     2:1.6.2-3
ii  libxau6                                      1:1.0.8-1
ii  libxdmcp6                                    1:1.1.1-1
ii  libxrandr2                                   2:1.4.2-1
ii  lsb-base                                     4.1+Debian13
ii  metacity [x-window-manager]                  1:3.12.0-2
ii  policykit-1                                  0.105-6.1
ii  ucf                                          3.0030
ii  x11-common                                   1:7.7+7
ii  x11-xserver-utils                            7.7+3
ii  xterm [x-terminal-emulator]                  308-1

Versions of packages gdm3 recommends:
ii  at-spi2-core               2.12.0-2
ii  desktop-base               7.0.3
ii  gnome-icon-theme           3.12.0-1
ii  gnome-icon-theme-symbolic  3.12.0-1
ii  x11-xkb-utils              7.7+1
ii  xserver-xephyr             2:1.16.0-1
ii  xserver-xorg               1:7.7+7
ii  zenity                     3.12.1-1.1

Versions of packages gdm3 suggests:
ii  gnome-orca            3.12.2-1
ii  libpam-gnome-keyring  3.8.2-2+b1

-- debconf information:
* shared/default-x-display-manager: gdm3
  gdm3/daemon_name: /usr/sbin/gdm3