Http://karuppuswamy.com/wordpress/2010/06/18/enter-password-to-unlock-your-keyring-prompt-in-ubuntu/
Ubuntu uses centralized password management tool called seahorse.
This tool is a front end GUI to Gnome's keyring management system. In
Simple this tool stores all passwords with a master password which is
Normally same as login password. This tool can manage your PGP keys, SSH
Keys and pass phrases we use in different applications in Ubuntu.
You can find the seahorse tool inUbuntu Main Menu-> Applications-> accessories-> passwords and encryption keys.
In practical I face a problem once I change my login password. You can change password either throughSystem-> preference-> about me-> Change Password...Or you can use shell commandPasswd. I use to change my password in either of these ways. In both the cases, I encounterEnter password to unlock your login KeyringPrompt dialog box during my first login after changing password.
Seahorse uses your login password as master password to unlock its
Pass Phrase storage box. When you change the password, it is not updated
To seahorse (at least, this is what I believe). So the New Login
Password fails to unlock seahorse storage box.
The simple command line way to do it is to remove~ /. Gnome2/keyrings/login. Keyring.
In GUI way:
Step-1:Ubuntu Main Menu-> Applications-> accessories-> passwords and encryption keys (This isSystem-> preference->Passwords and encryption keysIn my Ubuntu)
Step-2: InPasswordsTab, right clickPasswords: Login. In the menu selectChange Password...Option.
Step-3: enter your old login password and New login passwords.
You are done. Next time, it won't ask for any login password
Gnome keyring. If Ubuntu integrate this change while changing the user
Password, it wocould be better user experience.