Hi Daniel, No crash file was generated. It's simply fail to login as a second user if the first session is still open.
I can only provide logs if you need them. Apr 20 15:19:59 Jupiter gsd-color[26758]: failed to connect to device: Failed to connect to missing device /org/freedesktop/ColorManager/devices/xrandr_Samsung_Electric_Company_LC49G95T_H4ZR200280_gdm_120 Apr 20 15:20:00 Jupiter gdm-launch-environment]: GLib-GObject: g_object_unref: assertion 'G_IS_OBJECT (object)' failed Apr 20 15:20:00 Jupiter gdm3: Gdm: Child process -16722 was already dead. Apr 20 15:20:54 Jupiter gdm3: GLib-GObject: g_object_set_is_valid_property: object class 'GdmLocalDisplay' has no property named 'supported-session-tyes' Apr 20 15:20:55 Jupiter systemd[1]: Started Session c5 of User gdm. Apr 20 15:20:56 Jupiter org.gnome.Shell.desktop[29533]: Window manager warning: Failed to parse saved session file: L’ouverture du fichier « /var/lib/gdm3/.config/mutter/sessions/10edbd1855b7ffec6f165046085575987900000295180000.ms » a échoué : Aucun fichier ou dossier de ce type Apr 20 15:21:03 Jupiter gdm3: Gdm: GdmDisplay: Session never registered, failing Apr 20 15:21:11 Jupiter gdm3: GLib: Source ID 229 was not found when attempting to remove it Apr 20 15:21:22 Jupiter gsd-color[26758]: failed to connect to device: Failed to connect to missing device /org/freedesktop/ColorManager/devices/xrandr_Samsung_Electric_Company_LC49G95T_H4ZR200280_gdm_120 Apr 20 15:21:22 Jupiter gdm-launch-environment]: GLib-GObject: g_object_unref: assertion 'G_IS_OBJECT (object)' failed Apr 20 15:21:22 Jupiter gdm3: Gdm: Child process -29500 was already dead. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1969516 Title: gdm3 crash when switching users To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1969516/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs