How do you change login options on start screen in Ubuntu 20.04
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Not sure why but after I loaded Ubuntu on an old Acer (only OS) it asks to confirm user name before accepting PW. As I'm the only user how do I stop being offered this option and just enter PW?
Thats the default option for gdm3 (GNOME DISPLAY MANAGER)
In some very rare cases it is possible to login as special user case like gdm user for example.. thats why the option is showing "Not listed" to allow by entering user name and then password.
you can verify this by accessing to accounts directory
nautilus /var/lib/AccountsService/users
Observe that my own account has last line "false" this means this users shows in gdm login screen and other two with "true" this means they will not be shown but it may be possible to login to those users in very special and rare cases.. you can consider them they will never be used.
Thats the default option for gdm3 (GNOME DISPLAY MANAGER)
In some very rare cases it is possible to login as special user case like
gdmuser for example.. thats why the option is showing "Not listed" to allow by entering user name and then password.you can verify this by accessing to accounts directory
Observe that my own account has last line "false" this means this users shows in gdm login screen and other two with "true" this means they will not be shown but it may be possible to login to those users in very special and rare cases.. you can consider them they will never be used.