Please check for crashes (which gdm3 is designed to catch and that then causes the session type to change):
https://wiki.ubuntu.com/Bugs/Responses#Missing_a_crash_report_or_having_a_.crash_attachment
Please check for crashes (which gdm3 is designed to catch and that then causes the session type to change):
https:/ /wiki.ubuntu. com/Bugs/ Responses# Missing_ a_crash_ report_ or_having_ a_.crash_ attachment