I had this same issue and mine was also a keyring/security issue. In my case I had setup a PKI smart card to login to US DoD services from my home computer, but forgot to remove the card after a reboot, so gdm3 was trying to access the card. Once I removed the card and unplugged the card reader I was able to login, but not before I had used TTY and startx command to get to a desktop. So definitely check your credentials management or keyring for this issue.
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/2003610 Title: Cannot log in, keeps asking username To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/2003610/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
