Package: gdm3 Version: 45.0.1-2 Followup-For: Bug #1059245 Thanks for the reply, Simon.
I have done some more investigation, comparing to a freshly installed VM, and see this difference in the debug logs of gdm-wayland-session, which seems to be what misbehaves in my previous logs. $ sudo journalctl -t gdm-wayland-session Dec 26 14:01:56 desktop gdm-wayland-session[1469]: Gdm: Enabling debugging Dec 26 14:01:56 desktop gdm-wayland-session[1469]: Gdm: Running session message bus Dec 26 14:01:56 desktop gdm-wayland-session[1469]: GLib: g_unix_open_pipe() called with FD_CLOEXEC; please migrate to using O_CLOEXEC instead Dec 26 14:01:56 desktop gdm-wayland-session[1469]: GLib: g_unix_open_pipe() called with FD_CLOEXEC; please migrate to using O_CLOEXEC instead Dec 26 14:01:56 desktop gdm-wayland-session[1469]: Gdm: could not fetch environment: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1 Dec 26 14:01:56 desktop gdm-wayland-session[1469]: Gdm: Running wayland session Dec 26 14:01:56 desktop gdm-wayland-session[1469]: GLib: g_unix_open_pipe() called with FD_CLOEXEC; please migrate to using O_CLOEXEC instead Dec 26 14:01:56 desktop gdm-wayland-session[1469]: GLib-GIO: Using cross-namespace EXTERNAL authentication (this will deadlock if server is GDBus < 2.73.3) Dec 26 14:01:56 desktop gdm-wayland-session[1469]: Gdm: Could not register display: GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: Aucun affichage disponible This compared to a healthier test VM $ sudo journalctl -t gdm-wayland-session Dec 26 07:29:00 test-vm gdm-wayland-session[2232]: Gdm: Enabling debugging Dec 26 07:29:00 test-vm gdm-wayland-session[2232]: Gdm: Running session message bus Dec 26 07:29:00 test-vm gdm-wayland-session[2232]: GLib-GIO: Using cross-namespace EXTERNAL authentication (this will deadlock if server is GDBus < 2.73.3) Dec 26 07:29:00 test-vm gdm-wayland-session[2232]: Gdm: session message bus already running, not starting another one Dec 26 07:29:00 test-vm gdm-wayland-session[2232]: Gdm: Running wayland session Dec 26 07:29:00 test-vm gdm-wayland-session[2232]: GLib-GIO: Using cross-namespace EXTERNAL authentication (this will deadlock if server is GDBus < 2.73.3) Dec 26 07:29:00 test-vm gdm-wayland-session[2232]: Gdm: gdm-wayland-session: Session will register itself So the error seems to be that “Aucun affichange disponible” (No display available), so this would confirm the permission issue somewhere. I indeed can't see a running Xwayland on the impacted system. -- System Information: Debian Release: 12.4 APT prefers stable APT policy: (990, 'stable'), (500, 'stable-security'), (500, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 6.1.0-15-amd64 (SMP w/8 CPU threads; PREEMPT) Locale: LANG=fr_FR.UTF-8, LC_CTYPE=en_AU (charmap=UTF-8) (ignored: LC_ALL set to en_AU.UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages gdm3 depends on: ii accountsservice 22.08.8-6 ii adduser 3.134 ii dbus [default-dbus-system-bus] 1.14.10-1~deb12u1 ii dbus-bin 1.14.10-1~deb12u1 ii dbus-daemon 1.14.10-1~deb12u1 ii dconf-cli 0.40.0-4 ii dconf-gsettings-backend 0.40.0-4 ii debconf [debconf-2.0] 1.5.82 ii gir1.2-gdm-1.0 45.0.1-2 ii gnome-session [x-session-manager] 43.0-1+deb12u1 ii gnome-session-bin 43.0-1+deb12u1 ii gnome-session-common 43.0-1+deb12u1 ii gnome-settings-daemon 43.0-4 ii gnome-shell 43.9-0+deb12u1 ii gnome-terminal [x-terminal-emulator] 3.46.8-1 ii gsettings-desktop-schemas 43.0-1 ii libaccountsservice0 22.08.8-6 ii libaudit1 1:3.0.9-1 ii libc6 2.36-9+deb12u3 ii libcanberra-gtk3-0 0.30-10 ii libcanberra0 0.30-10 ii libgdk-pixbuf-2.0-0 2.42.10+dfsg-1+b1 ii libgdm1 45.0.1-2 ii libglib2.0-0 2.78.3-1 ii libglib2.0-bin 2.78.3-1 ii libgtk-3-0 3.24.38-2~deb12u1 ii libgudev-1.0-0 237-2 ii libkeyutils1 1.6.3-2 ii libpam-modules 1.5.2-6+deb12u1 ii libpam-runtime 1.5.2-6+deb12u1 ii libpam-systemd [logind] 252.19-1~deb12u1 ii libpam0g 1.5.2-6+deb12u1 ii librsvg2-common 2.54.7+dfsg-1~deb12u1 ii libselinux1 3.4-1+b6 ii libsystemd0 252.19-1~deb12u1 ii libx11-6 2:1.8.4-2+deb12u2 ii libxau6 1:1.0.9-1 ii libxcb1 1.15-1 ii libxdmcp6 1:1.1.2-3 ii polkitd 122-3 ii procps 2:4.0.2-3 ii systemd-sysv 252.19-1~deb12u1 ii ucf 3.0043+nmu1 ii x11-common 1:7.7+23 ii x11-xserver-utils 7.7+9+b1 ii xiterm+thai [x-terminal-emulator] 1.10-2+b2 Versions of packages gdm3 recommends: ii at-spi2-core 2.46.0-5 ii desktop-base 12.0.6+nmu1~deb12u1 ii gnome-session [x-session-manager] 43.0-1+deb12u1 ii x11-xkb-utils 7.7+7 ii xserver-xephyr 2:21.1.7-3+deb12u2 ii xserver-xorg 1:7.7+23 ii zenity 3.44.0-1 Versions of packages gdm3 suggests: pn libpam-fprintd <none> ii libpam-gnome-keyring 42.1-1+b2 pn libpam-pkcs11 <none> pn libpam-sss <none> ii orca 43.1-1 -- Configuration Files: /etc/gdm3/daemon.conf changed: [daemon] [security] [xdmcp] [chooser] [debug] Enable=true -- debconf information: * shared/default-x-display-manager: gdm3 gdm3/daemon_name: /usr/sbin/gdm3
