I'm very sorry but I have to modify my report from 2 days ago.
I repeated all my tests today and was not successful on any machine with the proposed version of gdm.
I may have forgotten to erase the file generated by my "echo" command in /etc/gdm/PostLogin/Default during a manual login and erroneously believed it had been generated during an automatic login.
Now, after new tests on 3 different machines, I can confirm that nothing is generated during an automatic login, so /etc/gdm/PostLogin/Default is still not run.
I'm very sorry but I have to modify my report from 2 days ago. PostLogin/ Default during a manual login and erroneously believed it had been generated during an automatic login. PostLogin/ Default is still not run.
I repeated all my tests today and was not successful on any machine with the proposed version of gdm.
I may have forgotten to erase the file generated by my "echo" command in /etc/gdm/
Now, after new tests on 3 different machines, I can confirm that nothing is generated during an automatic login, so /etc/gdm/