Dear Jeremy, here the requested output:
For gdm, it reports this: avril 22 05:04:26 g6.lan.dac org.freedesktop.secrets[12950]: GNOME_KEYRING_CONTROL=/var/lib/gdm3/.cache/keyring-DNYYK1 avril 22 05:04:40 g6.lan.dac gdm-launch-environment][12595]: pam_unix(gdm-launch-environment:session): session closed for user Debian-gdm avril 22 05:04:40 g6.lan.dac systemd[1]: var-lib-gdm3-.cache-gvfs.mount: Deactivated successfully. avril 22 05:04:40 g6.lan.dac gdm-launch-environment][12595]: GLib-GObject: g_object_unref: assertion 'G_IS_OBJECT (object)' failed avril 22 05:04:40 g6.lan.dac systemd[1]: var-lib-gdm3-.cache-doc.mount: Deactivated successfully. avril 22 05:04:40 g6.lan.dac gdm3[12058]: Gdm: Child process -12600 was already dead. avril 22 05:04:40 g6.lan.dac systemd[1]: gdm.service: Deactivated successfully. where it says: Gdm: Child process -12600 was already dead. avril 22 05:04:40 And for gnome-shell, I found this output: avril 22 05:04:14 g6.lan.dac gnome-shell[12614]: Error looking up permission: GDBus.Error:org.freedesktop.portal.Error.NotFound: No entry for geolocation avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: JS ERROR: Exception in callback for signal: login-format-changed: Error: Wrong type number; string expected avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: ATK Bridge is disabled but a11y has already been enabled. avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Registering session with GDM avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:15 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:16 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:16 g6.lan.dac gnome-shell[12614]: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument avril 22 05:04:20 g6.lan.dac gnome-shell[12614]: No permission to control network connections: Polkit.Error: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Action org.freedesktop.NetworkManager.network-control is not registered Where it says: Failed to lock front buffer on /dev/dri/card0: drmModeAddFB2WithModifiers failed: Invalid argument I'd like to note, the recent upgrade has introduced some bugs also with goa-daemon, where goa-daemon is consistently respawning, after logging into a X session with startx. If I kill goa-daemon with $ killall -9 goa-daemon, this stops, and I can use my GNOME applications again, without waiting a half minute for them to start. Thank you very much. Sincerely, Adrian Kiess On Thu, 21 Apr 2022 12:34:37 -0400 Jeremy Bicha <jeremy.bi...@canonical.com> wrote: > On Thu, Apr 21, 2022 at 11:51 AM Adrian Immanuel Kiess > <adr...@mx.aik.onl> wrote: > > GDM3 fails to load, after bringing up the system. > > Please switch to a virtual terminal (like Ctrl+Alt+F3) and look for > interesting messages in > journalctl -b > > Probably especially messages from gnome-shell or gdm > > Thank you, > Jeremy Bicha