As a further test of comment #3, when I type CTRL+ALT+F1, I get TTY.
There, I login with admin user account.
Then I type "sudo gdm start" and get the following messages:
** (gdm-binary:1910): WARNING **: Failed to acquire org.gnome.DisplayManager
** (gdm-binary:1910): WARNING **: Could not acquire name; bailing out
As this point, I logout and hold the main power button to shutdown the machine. Upon reboot, an automatic recovery process occurs.
Hope this helps clarify the problem.
As a further test of comment #3, when I type CTRL+ALT+F1, I get TTY.
There, I login with admin user account.
Then I type "sudo gdm start" and get the following messages:
** (gdm-binary:1910): WARNING **: Failed to acquire org.gnome. DisplayManager
** (gdm-binary:1910): WARNING **: Could not acquire name; bailing out
As this point, I logout and hold the main power button to shutdown the machine. Upon reboot, an automatic recovery process occurs.
Hope this helps clarify the problem.