Bug#769610: gdm3: purging the package fails because the GDM user is still in use

[Martin-Éric Racine]

Package: gdm3
Version: 3.14.1-1
Severity: important

Removing user `Debian-gdm' ...
Warning: group `Debian-gdm' has no more members.
userdel: user Debian-gdm is currently used by process 2019
/usr/sbin/deluser: `/usr/sbin/userdel Debian-gdm' returned error code 8. Exiting.
Could not remove Debian-gdm user.
/usr/sbin/delgroup: `Debian-gdm' still has `Debian-gdm' as their primary group!
Could not remove Debian-gdm group.

Presumably, the daemon wasn't stopped prior to removal, so the user is still being used and cannot be removed by postrm.

-- System Information:
Debian Release: jessie/sid
  APT prefers testing
  APT policy: (1001, 'testing')
Architecture: i386 (i586)

Kernel: Linux 3.16.0-4-586
Locale: LANG=fi_FI.UTF-8, LC_CTYPE=fi_FI.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages gdm3 depends on:
ii  accountsservice              0.6.37-3+b1
ii  adduser                      3.113+nmu3
ii  dconf-cli                    0.22.0-1
ii  dconf-gsettings-backend      0.22.0-1
ii  debconf [debconf-2.0]        1.5.53
ii  gir1.2-gdm3                  3.14.1-1
pn  gnome-session-bin            <none>
pn  gnome-settings-daemon        <none>
pn  gnome-shell                  <none>
ii  gsettings-desktop-schemas    3.14.1-1
ii  libaccountsservice0          0.6.37-3+b1
ii  libaudit1                    1:2.4-1
ii  libc6                        2.19-13
pn  libcanberra-gtk3-0           <none>
ii  libcanberra0                 0.30-2.1
ii  libgdk-pixbuf2.0-0           2.31.1-2+b1
ii  libgdm1                      3.14.1-1
it  libglib2.0-0                 2.42.0-2
ii  libglib2.0-bin               2.42.0-2
ii  libgtk-3-0                   3.14.4-2
ii  libpam-modules               1.1.8-3.1
ii  libpam-runtime               1.1.8-3.1
ii  libpam-systemd               215-5+b1
ii  libpam0g                     1.1.8-3.1
ii  librsvg2-common              2.40.5-1
ii  libselinux1                  2.3-2
ii  libsystemd0                  215-5+b1
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+b1
ii  lsb-base                     4.1+Debian13+nmu1
ii  metacity [x-window-manager]  1:3.14.1-2
ii  policykit-1                  0.105-7
ii  ucf                          3.0030
ii  x11-common                   1:7.7+7
ii  x11-xserver-utils            7.7+3+b1
ii  xterm [x-terminal-emulator]  312-1

Versions of packages gdm3 recommends:
ii  at-spi2-core               2.14.0-1
ii  desktop-base               7.0.3
pn  gnome-icon-theme           <none>
pn  gnome-icon-theme-symbolic  <none>
ii  x11-xkb-utils              7.7+1
ii  xserver-xephyr             2:1.16.1.901-1
ii  xserver-xorg               1:7.7+7
ii  zenity                     3.14.0-1

Versions of packages gdm3 suggests:
pn  gnome-orca            <none>
ii  libpam-gnome-keyring  3.14.0-1+b1