Bug#733952: gdm3 doesn't show greeter if started from invoke-rc.d

[John Hughes]

Package: gdm3
Version: 3.8.4-6
Severity: normal

Dear Maintainer,

   * What led up to the situation?

Trying to debug #730177 (gdm3 doesn't show greeter if can't access /usr/local)
I did an update-rc.d remove and tried to start gdm3 by invoke-rc.d gdm3 start

   * What was the outcome of this action?

Black screen with arrow cursor

   * What outcome did you expect instead?

Friendly greater screen

The greeter log contains *many* lines like:

dconf-CRITICAL **: unable to create directory '/run/user/0/dconf': Permission denied.  dconf will not work properly.

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

Kernel: Linux 3.11-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash

Versions of packages gdm3 depends on:
ii  accountsservice                              0.6.34-2
ii  adduser                                      3.113+nmu3
ii  dconf-cli                                    0.18.0-1
ii  dconf-gsettings-backend                      0.18.0-1
ii  debconf [debconf-2.0]                        1.5.52
ii  gir1.2-gdm3                                  3.8.4-6
ii  gnome-session [x-session-manager]            3.8.4-3
ii  gnome-session-bin                            3.8.4-3
ii  gnome-session-flashback [x-session-manager]  3.8.0-1
ii  gnome-settings-daemon                        3.8.5-2
ii  gnome-shell                                  3.8.4-5
ii  gnome-terminal [x-terminal-emulator]         3.10.1-1
ii  gsettings-desktop-schemas                    3.8.2-2
ii  libaccountsservice0                          0.6.34-2
ii  libatk1.0-0                                  2.10.0-2
ii  libaudit1                                    1:2.3.2-2
ii  libc6                                        2.17-97
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                           2.28.2-1+b1
ii  libgdm1                                      3.8.4-6
ii  libglib2.0-0                                 2.36.4-1
ii  libglib2.0-bin                               2.36.4-1
ii  libgtk-3-0                                   3.8.6-1
ii  libpam-modules                               1.1.3-10
ii  libpam-runtime                               1.1.3-10
ii  libpam-systemd                               204-5
ii  libpam0g                                     1.1.3-10
ii  libpango-1.0-0                               1.36.0-1+b1
ii  libpangocairo-1.0-0                          1.36.0-1+b1
ii  librsvg2-common                              2.40.0-1
ii  libselinux1                                  2.2.1-1
ii  libwrap0                                     7.6.q-24
ii  libx11-6                                     2:1.6.2-1
ii  libxau6                                      1:1.0.8-1
ii  libxdmcp6                                    1:1.1.1-1
ii  libxrandr2                                   2:1.4.1-1
ii  lsb-base                                     4.1+Debian12
ii  metacity [x-window-manager]                  1:2.34.13-1
ii  upower                                       0.9.23-2+b1
ii  x11-common                                   1:7.7+4
ii  x11-xserver-utils                            7.7+1
ii  xterm [x-terminal-emulator]                  300-1

Versions of packages gdm3 recommends:
ii  at-spi2-core               2.10.2-1
ii  desktop-base               7.0.3
ii  gnome-icon-theme           3.10.0-1
ii  gnome-icon-theme-symbolic  3.10.1-1
ii  x11-xkb-utils              7.7~1
ii  xserver-xephyr             2:1.14.5-1
ii  xserver-xorg               1:7.7+4
ii  zenity                     3.8.0-1

Versions of packages gdm3 suggests:
pn  gnome-orca            <none>
ii  libpam-gnome-keyring  3.8.2-2

-- Configuration Files:
/etc/gdm3/daemon.conf changed:
[daemon]
[security]
[xdmcp]
[greeter]
[chooser]
[debug]
  Enable = true


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