I used a Jetson nano 2 Gb for a project, and I used it for a while now. I just reboot it and now i struggle to log:
It is booting and when it come for the session manager (I guess) I log with my user and passwrd, then it is showing black screen with Nvidia logo then session manager appears again with authentication required… It is the good passwd but still, not logging …
It is possible that you have memory issue. If there is not enough space, booting problems can be occurred. I suggest you to connect the device ssh (or via serial) and delete unused packages or files to get some space.