Bug#1120609: gdm3 fails to start after upgrade to 49.1-6

[Brent]

Package: gdm3
Version: 48.0-3
Severity: important
X-Debbugs-Cc: webe3vt at aim.com

gdm3 fails to start after upgrading.  I get the black screen with a blinking
cursor in the top left corner.

The problem happens when upgrading the following:
gdm3 48.0-3 to 49.1-6
gir1.2-gdm-1.0 48.0-3 to 49.1-6
libgdm1 48.0-3 to 49.1-6
gnome-session 48.0-2 to 49.1-3
gnome-session-bin 48.0-2 to 49.1-3
gnome-session-common 48.0-2 to 49.1-3

This is the smallest set of dependent packages I can narrow it down to.
gdm3 starts fine when I revert the upgrade.


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

Kernel: Linux 6.12.48251025 (SMP w/2 CPU threads; PREEMPT)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_WARN, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gdm3 depends on:
ii  accountsservice                              23.13.9-8
ii  dbus [default-dbus-system-bus]               1.16.2-2
ii  dbus-bin                                     1.16.2-2
ii  dbus-daemon                                  1.16.2-2
ii  dconf-cli                                    0.49.0-2
ii  dconf-gsettings-backend                      0.49.0-2
ii  debconf [debconf-2.0]                        1.5.91
ii  gir1.2-gdm-1.0                               48.0-3
ii  gnome-session [x-session-manager]            48.0-2
ii  gnome-session-bin                            48.0-2
ii  gnome-session-common                         48.0-2
ii  gnome-session-flashback [x-session-manager]  3.58.0-1
ii  gnome-settings-daemon                        48.1-2
ii  gnome-shell                                  48.5-3
ii  gnome-terminal [x-terminal-emulator]         3.58.0-1
ii  gsettings-desktop-schemas                    49.1-1
ii  libaccountsservice0                          23.13.9-8
ii  libaudit1                                    1:4.1.2-1
ii  libc6                                        2.41-12
ii  libgdk-pixbuf-2.0-0                          2.44.4+dfsg-1
ii  libgdm1                                      48.0-3
ii  libglib2.0-0t64                              2.86.1-1
ii  libglib2.0-bin                               2.86.1-1
ii  libgtk-3-0t64                                3.24.51-1
ii  libgudev-1.0-0                               238-7
ii  libjson-glib-1.0-0                           1.10.8+ds-2
ii  libkeyutils1                                 1.6.3-6
ii  libpam-modules                               1.7.0-5
ii  libpam-runtime                               1.7.0-5
ii  libpam-systemd [logind]                      258.1-2
ii  libpam0g                                     1.7.0-5
ii  librsvg2-common                              2.61.3+dfsg-2
ii  libselinux1                                  3.9-2
ii  libsystemd0                                  258.1-2
ii  libx11-6                                     2:1.8.12-1
ii  libxau6                                      1:1.0.11-1
ii  libxcb1                                      1.17.0-2+b1
ii  libxdmcp6                                    1:1.1.5-1
ii  metacity [x-window-manager]                  1:3.58.1-1
ii  mutter [x-window-manager]                    48.5-1
ii  polkitd                                      126-2
ii  procps                                       2:4.0.4-9
ii  systemd [systemd-sysusers]                   258.1-2
ii  systemd-sysv                                 258.1-2
ii  ucf                                          3.0052
ii  x11-common                                   1:7.7+26
ii  x11-xserver-utils                            7.7+11
ii  xfce4-session [x-session-manager]            4.20.3-1
ii  xfwm4 [x-window-manager]                     4.20.0-1
ii  xterm [x-terminal-emulator]                  403-1

Versions of packages gdm3 recommends:
ii  at-spi2-core                                 2.58.1-1
ii  desktop-base                                 14.0.0~pre2
ii  gnome-session [x-session-manager]            48.0-2
ii  gnome-session-flashback [x-session-manager]  3.58.0-1
ii  x11-xkb-utils                                7.7+9
ii  xfce4-session [x-session-manager]            4.20.3-1
ii  xserver-xephyr                               2:21.1.20-1
ii  xserver-xorg                                 1:7.7+26
ii  zenity                                       4.1.99-1

Versions of packages gdm3 suggests:
pn  libpam-fprintd        <none>
ii  libpam-gnome-keyring  48.0-5
pn  libpam-pkcs11         <none>
pn  libpam-sss            <none>
ii  orca                  49.4-1

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


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