Under Ubuntu, the keyring is automatically locked by default while hibernating. When starting Ubuntu after hibernation, it prompts you for the keyring password.
To disable this lock:
- Go in Applications > System Tools > Configuration Editor
- Uncheck /apps/gnome-power-manager/lock/gnome_keyring_hibernate
Note: you can also launch the config editor with the gconf-editor command.
Reference:
- A “lock” search in the configuration editor.