Lubuntu 14.04 - unlock keyring on login

Make sure, libpam-gnome-keyring is installed on your system

sudo apt-get install libpam-gnome-keyring

Also you should have a login keyring in ~/.gnome2/keyrings/login.keyring

---Edited by OP to cover another situation.

I installed LXDE on my Ubuntu 14.04 system and started getting this keyring popup again when I took a backup. libpam-gnome-keyring was already installed on this system! To fix it, I had to add a line of text to two files, like this:

To /etc/pam.d/passwd add:

password optional pam_gnome_keyring.so

And to /etc/pam.d/login add:

session    optional     pam_gnome_keyring.so        auto_start

This will unlock the keyring on login when I log in through LXDE.