Bug#683338: gdm3: no prompt anymore after login cancel using disable_user_list

[Jonathan Michalon]

Package: gdm3
Version: 3.4.1-2
Severity: important

When disable_user_list is activated, entering an username and then cancelling
login (when prompted for the password) results in an empty unusable greeter.
Only solution would be to reboot using the button or restart from console. 

It seems not to affect people without disable_user_list.

In :1-greeter.log I found this:
gdm-simple-greeter[32019]: CRITICAL: get_column_number: assertion `i < gtk_tree_view_get_n_columns (treeview)' failed

A screenshot showing the emptiness may be found here:
http://misc.michalon.eu/GDM-Screenshot.png


-- System Information:
Debian Release: wheezy/sid
  APT prefers testing
  APT policy: (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 3.2.0-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gdm3 depends on:
ii  accountsservice                             0.6.21-6
ii  adduser                                     3.113+nmu3
ii  dconf-gsettings-backend                     0.12.1-2
ii  dconf-tools                                 0.12.1-2
ii  debconf [debconf-2.0]                       1.5.44
ii  dpkg                                        1.16.4.3
ii  fvwm [x-window-manager]                     1:2.5.30.ds-1.1
ii  gir1.2-freedesktop                          1.32.1-1
ii  gir1.2-glib-2.0                             1.32.1-1
ii  gnome-session [x-session-manager]           3.4.2.1-1
ii  gnome-session-bin                           3.4.2.1-1
ii  gnome-session-fallback [x-session-manager]  3.4.2.1-1
ii  gnome-settings-daemon                       3.4.2-3
ii  gnome-terminal [x-terminal-emulator]        3.4.1.1-1
ii  gsettings-desktop-schemas                   3.4.2-1
ii  libaccountsservice0                         0.6.21-6
ii  libatk1.0-0                                 2.4.0-2
ii  libattr1                                    1:2.4.46-8
ii  libaudit0                                   1:1.7.18-1.1
ii  libc6                                       2.13-33
ii  libcairo-gobject2                           1.12.2-2
ii  libcairo2                                   1.12.2-2
ii  libcanberra-gtk3-0                          0.28-4
ii  libcanberra0                                0.28-4
ii  libdbus-1-3                                 1.6.0-1
ii  libdbus-glib-1-2                            0.100-1
ii  libfontconfig1                              2.9.0-6
ii  libgdk-pixbuf2.0-0                          2.26.1-1
ii  libglib2.0-0                                2.32.3-1
ii  libglib2.0-bin                              2.32.3-1
ii  libgtk-3-0                                  3.4.2-2
ii  libpam-modules                              1.1.3-7.1
ii  libpam-runtime                              1.1.3-7.1
ii  libpam0g                                    1.1.3-7.1
ii  libpango1.0-0                               1.30.0-1
ii  librsvg2-common                             2.36.1-1
ii  libselinux1                                 2.1.9-5
ii  libupower-glib1                             0.9.17-1
ii  libwrap0                                    7.6.q-23
ii  libx11-6                                    2:1.5.0-1
ii  libxau6                                     1:1.0.7-1
ii  libxdmcp6                                   1:1.1.1-1
ii  libxklavier16                               5.2.1-1
ii  libxrandr2                                  2:1.3.2-2
ii  lsb-base                                    4.1+Debian7
ii  metacity [x-window-manager]                 1:2.34.3-2
ii  policykit-1-gnome                           0.105-2
ii  twm [x-window-manager]                      1:1.0.6-1
ii  upower                                      0.9.17-1
ii  x11-common                                  1:7.7+1
ii  x11-xserver-utils                           7.7~3
ii  xterm [x-terminal-emulator]                 278-1

Versions of packages gdm3 recommends:
ii  desktop-base             7.0.0
ii  gnome-icon-theme         3.4.0-2
ii  libatk-adaptor [at-spi]  2.5.3-1
ii  x11-xkb-utils            7.7~1
ii  xserver-xephyr           2:1.12.1.902-1
ii  xserver-xorg             1:7.7+1
ii  zenity                   3.4.0-2

Versions of packages gdm3 suggests:
ii  gnome-mag             1:0.16.3-1
ii  gnome-orca            3.4.2-2
ii  gnome-shell           3.4.1-8
ii  gok                   2.30.0-1
ii  libpam-gnome-keyring  3.4.1-4

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