gdm crashes after update

Probleme crach gdm .

requires restarting x server via control alt backspace

journalclt -p err

jui 18 08:48:29 supertux gnome-session-binary[980]: Unrecoverable failure in required component org.gnome.Shell.desktop

journalctl | grep gnome-session

jui 18 07:43:42 supertux gnome-session[1008]: gnome-session-binary[1008]: WARNING: Falling back to non-systemd startup procedure due to error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1
jui 18 07:43:42 supertux gnome-session-binary[1008]: WARNING: Falling back to non-systemd startup procedure due to error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1
jui 18 07:43:42 supertux /usr/lib/gdm-x-session[1007]: dbus-daemon[1007]: [session uid=120 pid=1007] Activating service name='org.freedesktop.systemd1' requested by ':1.4' (uid=120 pid=1008 comm="/usr/lib/gnome-session-binary --autostart /usr/sha")
jui 18 07:43:42 supertux /usr/lib/gdm-x-session[1007]: dbus-daemon[1007]: [session uid=120 pid=1007] Activating service name='org.freedesktop.systemd1' requested by ':1.4' (uid=120 pid=1008 comm="/usr/lib/gnome-session-binary --autostart /usr/sha")
jui 18 07:43:43 supertux gnome-session[1008]: gnome-session-binary[1008]: WARNING: App 'org.gnome.Shell.desktop' exited with code 1
jui 18 07:43:43 supertux gnome-session-binary[1008]: WARNING: App 'org.gnome.Shell.desktop' exited with code 1
jui 18 07:43:43 supertux gnome-session[1008]: gnome-session-binary[1008]: WARNING: App 'org.gnome.Shell.desktop' exited with code 1
jui 18 07:43:43 supertux gnome-session[1008]: gnome-session-binary[1008]: WARNING: App 'org.gnome.Shell.desktop' respawning too quickly
jui 18 07:43:43 supertux gnome-session-binary[1008]: WARNING: App 'org.gnome.Shell.desktop' exited with code 1
jui 18 07:43:43 supertux gnome-session-binary[1008]: Unrecoverable failure in required component org.gnome.Shell.desktop
jui 18 07:43:43 supertux gnome-session-binary[1008]: WARNING: App 'org.gnome.Shell.desktop' respawning too quickly
jui 18 07:43:43 supertux gnome-session-binary[1008]: Entering running state
jui 18 07:44:56 supertux gnome-session-f[1065]: gnome-session-failed: Fatal IO error 11 (Ressource temporairement non disponible) on X server :0.
jui 18 07:44:56 supertux gnome-session[1008]: gnome-session-binary[1008]: WARNING: App 'org.gnome.SettingsDaemon.Wacom.desktop' exited with code 1
jui 18 07:44:56 supertux gnome-session[1008]: gnome-session-binary[1008]: WARNING: App 'org.gnome.SettingsDaemon.Color.desktop' exited with code 1
jui 18 07:44:56 supertux gnome-session[1008]: gnome-session-binary[1008]: WARNING: App 'org.gnome.SettingsDaemon.MediaKeys.desktop' exited with code 1
jui 18 07:44:56 supertux gnome-session[1008]: gnome-session-binary[1008]: WARNING: App 'org.gnome.SettingsDaemon.Power.desktop' exited with code 1
jui 18 07:44:56 supertux gnome-session-binary[1008]: WARNING: App 'org.gnome.SettingsDaemon.Wacom.desktop' exited with code 1
jui 18 07:44:56 supertux gnome-session-binary[1008]: WARNING: App 'org.gnome.SettingsDaemon.Color.desktop' exited with code 1
jui 18 07:44:56 supertux gnome-session-binary[1008]: WARNING: App 'org.gnome.SettingsDaemon.MediaKeys.desktop' exited with code 1
jui 18 07:44:56 supertux gnome-session-binary[1008]: WARNING: App 'org.gnome.SettingsDaemon.Power.desktop' exited with code 1
jui 18 07:44:56 supertux gnome-session[1008]: gnome-session-binary[1008]: WARNING: App 'org.gnome.SettingsDaemon.Keyboard.desktop' exited with code 1
jui 18 07:44:56 supertux gnome-session-binary[1008]: WARNING: App 'org.gnome.SettingsDaemon.Keyboard.desktop' exited with code 1
jui 18 07:44:56 supertux /usr/lib/gdm-x-session[1007]: dbus-daemon[1007]: [session uid=120 pid=1007] Activating service name='org.freedesktop.systemd1' requested by ':1.4' (uid=120 pid=1008 comm="/usr/lib/gnome-session-binary --autostart /usr/sha")
jui 18 07:44:57 supertux /usr/lib/gdm-x-session[1224]: dbus-daemon[1224]: [session uid=120 pid=1224] Activating service name='org.a11y.Bus' requested by ':1.0' (uid=120 pid=1229 comm="/usr/lib/gnome-session-check-accelerated ")
jui 18 07:44:57 supertux /usr/lib/gdm-x-session[1224]: dbus-daemon[1224]: [session uid=120 pid=1224] Activating service name='org.freedesktop.systemd1' requested by ':1.3' (uid=120 pid=1225 comm="/usr/lib/gnome-session-binary --autostart /usr/sha")
jui 18 07:44:57 supertux /usr/lib/gdm-x-session[1224]: dbus-daemon[1224]: [session uid=120 pid=1224] Activating service name='org.freedesktop.systemd1' requested by ':1.4' (uid=120 pid=1225 comm="/usr/lib/gnome-session-binary --autostart /usr/sha")
jui 18 07:44:57 supertux gnome-session[1225]: gnome-session-binary[1225]: WARNING: Falling back to non-systemd startup procedure due to error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1
jui 18 07:44:57 supertux gnome-session-binary[1225]: WARNING: Falling back to non-systemd startup procedure due to error: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1
jui 18 07:44:57 supertux /usr/lib/gdm-x-session[1224]: dbus-daemon[1224]: [session uid=120 pid=1224] Activating service name='org.freedesktop.systemd1' requested by ':1.4' (uid=120 pid=1225 comm="/usr/lib/gnome-session-binary --autostart /usr/sha")
jui 18 07:44:57 supertux /usr/lib/gdm-x-session[1224]: dbus-daemon[1224]: [session uid=120 pid=1224] Activating service name='org.freedesktop.systemd1' requested by ':1.4' (uid=120 pid=1225 comm="/usr/lib/gnome-session-binary --autostart /usr/sha")
jui 18 07:44:58 supertux gnome-session-binary[1225]: Entering running state
jui 18 07:53:44 supertux /usr/lib/gdm-x-session[1466]: /etc/gdm/Xsession: Setup done, will execute: /usr/bin/gnome-session
jui 18 07:53:44 supertux dbus-daemon[1464]: [session uid=1000 pid=1464] Activating via systemd: service name='org.a11y.Bus' unit='at-spi-dbus-bus.service' requested by ':1.3' (uid=1000 pid=1478 comm="/usr/lib/gnome-session-check-accelerated ")
jui 18 07:53:44 supertux systemd[1437]: gnome-session-x11@gnome.target: Requested dependency OnFailure=gnome-session-failed.target ignored (target units cannot fail).
jui 18 07:53:44 supertux systemd[1437]: gnome-session.target: Requested dependency OnFailure=gnome-session-failed.target ignored (target units cannot fail).
jui 18 07:53:44 supertux systemd[1437]: gnome-session-pre.target: Requested dependency OnFailure=gnome-session-shutdown.target ignored (target units cannot fail).
jui 18 07:53:44 supertux systemd[1437]: gnome-session-initialized.target: Requested dependency OnFailure=gnome-session-shutdown.target ignored (target units cannot fail).
jui 18 07:53:44 supertux systemd[1437]: gnome-session@gnome-initial-setup.target: Requested dependency OnFailure=gnome-session-failed.target ignored (target units cannot fail).
jui 18 07:53:44 supertux systemd[1437]: gnome-session@gnome-login.target: Requested dependency OnFailure=gnome-session-failed.target ignored (target units cannot fail).
jui 18 07:53:44 supertux systemd[1437]: gnome-session-x11.target: Requested dependency OnFailure=gnome-session-failed.target ignored (target units cannot fail).
jui 18 07:53:44 supertux systemd[1437]: gnome-session@gnome.target: Requested dependency OnFailure=gnome-session-failed.target ignored (target units cannot fail).
jui 18 07:53:44 supertux systemd[1437]: gnome-session-failed.target: Requested dependency OnFailure=gnome-session-shutdown.target ignored (target units cannot fail).
jui 18 07:53:44 supertux gnome-session-c[1490]: Error creating FIFO: Le fichier existe

I can't find the source of the problem
can you help me.

thank you

Go to TTY and restart gdm

sudo systemctl restart gdm

If it errors out, what does it say?

send the system logs to fix the bug.
simply restart xserver with control atl backspace and return to normal.
But is That a normal bug well apparaise is not serious

crach gdm

gdm.service - GNOME Display Manager
     Loaded: loaded (/usr/lib/systemd/system/gdm.service; enabled; vendor preset: disabled)
     Active: active (running) since Sun 2020-07-19 15:44:57 CEST; 1min 51s ago
   Main PID: 525 (gdm)
      Tasks: 81 (limit: 19125)
     Memory: 234.3M
     CGroup: /system.slice/gdm.service
             ├─ 525 /usr/bin/gdm
             ├─ 732 gdm-session-worker [pam/gdm-launch-environment]
             ├─ 812 /usr/lib/gdm-x-session dbus-run-session -- gnome-session --autostart /usr/share/gdm/greeter/autostart
             ├─ 814 /usr/lib/Xorg vt1 -displayfd 3 -auth /run/user/120/gdm/Xauthority -nolisten tcp -background none -noreset -keeptty -verbose 3
             ├─ 984 dbus-run-session -- gnome-session --autostart /usr/share/gdm/greeter/autostart
             ├─ 986 dbus-daemon --nofork --print-address 4 --session
             ├─ 988 /usr/lib/gnome-session-binary --autostart /usr/share/gdm/greeter/autostart
             ├─1002 /usr/lib/at-spi-bus-launcher
             ├─1008 /usr/bin/dbus-daemon --config-file=/usr/share/defaults/at-spi2/accessibility.conf --nofork --print-address 3
             ├─1053 /usr/lib/gnome-session-failed
             ├─1054 /usr/lib/gsd-sharing
             ├─1055 /usr/lib/gsd-wacom
             ├─1056 /usr/lib/gsd-color
             ├─1057 /usr/lib/gsd-keyboard
             ├─1058 /usr/lib/gsd-print-notifications
             ├─1059 /usr/lib/gsd-rfkill
             ├─1060 /usr/lib/gsd-smartcard
             ├─1061 /usr/lib/gsd-datetime
             ├─1063 /usr/lib/gsd-media-keys
             ├─1064 /usr/lib/gsd-screensaver-proxy
             ├─1066 /usr/lib/gsd-sound
             ├─1067 /usr/lib/gsd-a11y-settings
             ├─1071 /usr/lib/gsd-housekeeping
             ├─1074 /usr/lib/gsd-power
             ├─1103 /usr/lib/at-spi2-registryd --use-gnome-session
             └─1138 /usr/lib/gsd-printer

jui 19 15:45:04 supertux gsd-sharing[1054]: Failed to StopUnit service: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1
jui 19 15:45:04 supertux gsd-sharing[1054]: Failed to StopUnit service: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1
jui 19 15:45:06 supertux /usr/lib/gdm-x-session[814]: (II) event1  - Power Button: device removed
jui 19 15:45:06 supertux /usr/lib/gdm-x-session[814]: (II) event0  - Power Button: device removed
jui 19 15:45:06 supertux /usr/lib/gdm-x-session[814]: (II) event3  - Microsoft Microsoft® SiderWinderTM X6 Keyboard: device removed
jui 19 15:45:06 supertux /usr/lib/gdm-x-session[814]: (II) event5  - E-Signal COUGAR Minos X3: device removed
jui 19 15:45:06 supertux /usr/lib/gdm-x-session[814]: (II) event6  - E-Signal COUGAR Minos X3 Keyboard: device removed
jui 19 15:45:06 supertux /usr/lib/gdm-x-session[814]: (II) event8  - E-Signal COUGAR Minos X3 System Control: device removed
jui 19 15:45:06 supertux /usr/lib/gdm-x-session[814]: (II) event4  - Microsoft Microsoft® SiderWinderTM X6 Keyboard: device removed
jui 19 15:45:06 supertux /usr/lib/gdm-x-session[814]: (II) event11 - E-Signal COUGAR Minos X3 Consumer Control: device removed

Where is the crash?

a white screen appears with a message that something is wrong.

when i display the services in systemctl there is a bug.

supertux gsd-sharing [1054]: Failed to StopUnit service: GDBus.Error: org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.freedesktop.systemd1 exited with status 1

I have found the problem Zram the new config file is crap
to restore his previous works

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