I disable all login passwords on my Ubuntu which is on my AGX Xavier Dev Kit. And I set the automatic login. When I open the chorimum I enter the keyring password. After that when I restart the device Ubuntu asks me a login password. I tried all my passwords but I could not login to my account. So I want to reset the password. I could not open GNU GRUB menu with Shift or esc keys. Is there any difference? How can I open GNU GRUB menu?